Communication method and apparatus

Abstract

The present application provides a communication method and apparatus. The method comprises: determining a phase tracking reference signal (PTRS); and mapping the PTRS into an intermediate frequency domain range within a first bandwidth, wherein the PTRS is not mapped in an edge frequency domain range within the first bandwidth. The present application can improve the phase noise estimation performance, thereby improving the demodulation performance under a phase noise condition.

Description

A communication method and apparatus

[0001] This application claims priority from the Chinese patent application No. 202410418510.4 filed on April 8, 2024, and entitled "A communication method and apparatus", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of communication technology, in particular to a communication method and apparatus. BACKGROUND

[0003] Communication is the transmission of information between two or more points, and sensing is the detection of parameters of the physical environment, such as ranging, speed measurement, etc. Integrated sensing and communications (ISAC) is to integrate the functions of communication and sensing together, so that the future communication system has both communication and sensing functions. In the process of transmitting information in the wireless channel, the characteristics of the channel are actively recognized and analyzed, so as to sense the physical characteristics of the surrounding environment, so that the functions of communication and sensing are enhanced.

[0004] At present, high frequency, such as 6 gigahertz (GHz) or above frequency band, mainly including 28 GHz, 39 GHz, 60 GHz, 73 GHz, etc., is used to solve the growing demand for communication because of its rich frequency resources. Its significant feature is to include a large bandwidth and a high-integrated antenna array to achieve high throughput, but there will also be serious radio frequency distortion problems, such as phase noise (PHN) and carrier frequency offset (CFO). In addition, the Doppler shift of high frequency is also larger, and all of them will introduce phase errors, resulting in the performance degradation of high-frequency communication systems or even unable to work.

[0005] Taking phase noise as an example, as the frequency band increases, the higher the phase noise power spectral density, the greater the impact on the received signal, as shown in FIG. 1 and FIG. 2. When the frequency band is high, the deterioration of phase noise will lead to poor demodulation performance. Therefore, in the existing new radio (NR) protocol, a phase tracking reference signal (PTRS) is introduced in the uplink transmission to compensate for the impact of phase noise and improve the demodulation performance under the condition of phase noise. That is, in order to remove the phase noise, the sending end will insert the PTRS on part of the subcarriers, and send the known reference signal, i.e. the PTRS, to the receiving end. The receiving end can estimate the phase noise according to the PTRS and then perform corresponding phase compensation.

[0006] By performing frequency-domain spectrum shaping (FDSS) processing on the signal of the sending end, the perception function can be improved, but the communication function is reduced, for example, after performing FDSS processing on the signal of the sending end, the signal energy of the PTRS on the edge subcarrier is too low, which affects the estimation of the phase noise, thereby reducing the demodulation performance. SUMMARY

[0007] The present application provides a communication method and device, which can improve the phase noise estimation performance, thereby improving the demodulation performance under the phase noise condition.

[0008] In a first aspect, an embodiment of the present application provides a communication method, which can be applied to a terminal device, including can be executed by the terminal device, can be executed by a component (for example, a processor, a chip, or a chip system, etc.) in the terminal device, or can be a logic module or software that can realize all or part of the terminal device function, the method includes: determining a phase tracking reference signal PTRS; mapping the PTRS to a middle frequency domain range within a first bandwidth, and not mapping the PTRS in an edge frequency domain range within the first bandwidth.

[0009] Optionally, the PTRS is sent.

[0010] In the above method, by mapping the PTRS in the middle frequency domain range within the first bandwidth, and not mapping the PTRS in the edge frequency domain range within the first bandwidth, the PTRS can be mapped on the subcarrier with strong signal energy, and the PTRS is not mapped on the subcarrier with weak signal energy, which ensures the relevant parameters of the receiving end, so that the PTRS mapped on the subcarrier with strong signal energy is better received, thereby ensuring the phase noise estimation performance of the receiving end. In summary, by the above method, the phase noise estimation performance can be improved, thereby improving the demodulation performance under the phase noise condition.

[0011] In a possible implementation manner, the first bandwidth is a scheduling bandwidth N RB or a part of the scheduling bandwidth The part of the scheduling bandwidth is N RB . The data symbols transmitted in the scheduling bandwidth N RB are generated based on the data symbols in the part of the scheduling bandwidth . For example, by copying a part of the data in the scheduling bandwidth N to the frequency resource outside the scheduling bandwidth N , or copying the conjugate of a part of the data in the scheduling bandwidth N to the frequency resource outside the scheduling bandwidth N .

[0012] In the above method, when the first bandwidth is the scheduling bandwidth, it can be applied to the case where the scheduling bandwidth is scheduled, or can be applied to the case where the total bandwidth is scheduled, when the first bandwidth is the partial scheduling bandwidth, it can be applied to the bandwidth expansion and the case where the partial scheduling bandwidth is scheduled, in short, when the first bandwidth is the scheduling bandwidth or the partial scheduling bandwidth, the adaptability of the system can be ensured.

[0013] In yet another possible implementation, the scheduling bandwidth N RB The number of corresponding subcarriers is equal to the number of data modulation symbols plus the number of PTRSs that need to be mapped within the scheduling bandwidth N RB ; or the number of corresponding subcarriers is equal to the number of data modulation symbols plus the number of PTRSs that need to be mapped within the partial scheduling bandwidth ; wherein the ; wherein the indicates the number of subcarriers included in one resource block.

[0014] In yet another possible implementation, the edge frequency domain range includes K0 and / or K1 subcarriers, and / or the edge frequency domain range includes N0 and / or N1 resource blocks, wherein the K0, the K1, the N0, and the N1 are integers greater than or equal to 0.

[0015] Optionally, the K0 can be equal to the K1, and the N0 can be equal to the N1, in this way, the system design can be simplified.

[0016] Optionally, the K0 can not be equal to the K1, and the N0 can not be equal to the N1, in this way, the flexibility of the system can be improved.

[0017] In the above method, by not mapping the PTRS in the edge frequency domain range within the first bandwidth, it can be ensured that the PTRS is not mapped on the subcarrier with weak signal energy, and the related parameters of the receiving end are ensured, so that the receiving end avoids receiving the PTRS on the subcarrier with weak signal energy, thereby affecting the phase noise estimation performance, and further avoiding reducing the demodulation performance. In short, by the above method, the phase noise estimation performance can be improved, thereby improving the demodulation performance under the phase noise condition.

[0018] In yet another possible implementation, the first bandwidth includes a scheduling bandwidth N RB , and the intermediate frequency domain range includes a range of subcarrier indexes, and the range of subcarrier indexes includes a range of resource block indexes, and the range of resource block indexes includes [N0, N RB - N1]; or the first bandwidth includes a partial scheduling bandwidth The intermediate frequency domain range includes a range of subcarrier indexes, which includes The intermediate frequency domain range includes a range of resource block indexes, which includes Wherein, the represents the number of subcarriers included in one resource block.

[0019] In the above method, by mapping the PTRS in the intermediate frequency domain range within the first bandwidth, the PTRS can be mapped on the subcarriers with strong signal energy, to ensure the relevant parameters of the receiving end, so that the PTRS mapped on the subcarriers with strong signal energy is better received, thereby ensuring the phase noise estimation performance of the receiving end. In summary, by the above method, the phase noise estimation performance can be improved, thereby improving the demodulation performance under the phase noise condition.

[0020] In another possible implementation, when the first bandwidth is a partial scheduling bandwidth , the K0=0 and / or the K1=0; or when the first bandwidth is a partial scheduling bandwidth , the N0=0 and / or the N1=0.

[0021] Optionally, the K0 can be equal to the K1, and the N0 can be equal to the N1, in this way, the system design can be simplified.

[0022] Optionally, the K0 can not be equal to the K1, and the N0 can not be equal to the N1, in this way, the flexibility of the system can be improved.

[0023] In the above method, by not mapping the PTRS in the edge frequency domain range within the first bandwidth, the PTRS can be avoided from being mapped on the subcarriers with weak signal energy, to ensure the relevant parameters of the receiving end, so that the receiving end avoids receiving the PTRS on the subcarriers with weak signal energy, thereby affecting the phase noise estimation performance, and further avoiding reducing the demodulation performance. In summary, by the above method, the phase noise estimation performance can be improved, thereby improving the demodulation performance under the phase noise condition.

[0024] In another possible implementation, the intermediate frequency domain range includes M SC subcarriers and / or M RB resource blocks; the first bandwidth includes a scheduling bandwidth N RB , the intermediate frequency domain range includes a range of subcarrier indexes, which includes or The intermediate frequency domain range includes a range of resource block indexes, which includes or or the first bandwidth includes a partial scheduling bandwidth The intermediate frequency domain range includes a range of subcarrier indexes, which includes Or The intermediate frequency domain range includes a range of resource block indexes, which includes Or Wherein, the indicates the number of subcarriers included in one resource block.

[0025] In the above method, by mapping the PTRS in the intermediate frequency domain range within the first bandwidth, the PTRS can be mapped on the subcarriers with strong signal energy, so as to ensure the correlation parameters of the receiving end, so that the PTRS mapped on the subcarriers with strong signal energy is better received, thereby ensuring the phase noise estimation performance of the receiving end. In summary, by the above method, the phase noise estimation performance can be improved, thereby improving the demodulation performance under the phase noise condition.

[0026] In another possible implementation manner, the first bandwidth is a partial scheduling bandwidth When the and the M SC , including: Or the first bandwidth is a partial scheduling bandwidth When the and the M RB , including:

[0027] In another possible implementation manner, the starting position of the PTRS mapping in the intermediate frequency domain range is equal to the subcarrier reference starting position plus a first offset; and / or the starting position of the PTRS mapping in the intermediate frequency domain range is equal to the resource block reference starting position plus a second offset.

[0028] In another possible implementation manner, the relationship among the K0, the K1, the M SC , the N RB , including: Wherein, the indicates the number of subcarriers included in one resource block; and / or the relationship among the K0, the K1, the M SC , the N , including: Wherein, the indicates the number of subcarriers included in one resource block.

[0029] In another possible implementation manner, one or more of the following related to the first parameter, the one or more of the following including: K0, K1, N0, N1, M SC , or M RB; wherein the first parameter comprises a roll-off coefficient and / or a bandwidth extension coefficient.

[0030] In the above method, by the above manner, dynamic adjustment of performance can be realized.

[0031] In yet another possible implementation, the PTRS density parameter, which is a parameter employed when mapping the PTRS into the intermediate frequency domain range within the first bandwidth, satisfies one or more of the following: the PTRS density parameter is predefined; the PTRS density parameter is related to one or more of the following parameters, including: K0, K1, N RB , M SC or M RB ; or the PTRS density parameter is related to a first parameter, which comprises a roll-off coefficient and / or a bandwidth extension coefficient.

[0032] In the above method, by increasing the density of the PTRS, the loss of the number of PTRS caused by not mapping the second part in the edge frequency domain range can be avoided, thereby ensuring the number of transmitted PTRS, and further ensuring the phase noise estimation performance, thereby improving the demodulation performance under the condition of phase noise.

[0033] In yet another possible implementation, the PTRS comprises a first part and a second part; the mapping the PTRS into the intermediate frequency domain range within the first bandwidth comprises: mapping the first part of the PTRS into the intermediate frequency domain range within the first bandwidth; the not mapping the PTRS in the edge frequency domain range within the first bandwidth comprises: not mapping the second part in the edge frequency domain range within the first bandwidth; the method further comprises: mapping the second part onto X resource blocks in the intermediate frequency domain range within the first bandwidth, wherein the number of PTRS corresponding to the second part is equal to the X.

[0034] In the above method, by mapping the second part onto X resource blocks in the intermediate frequency domain range instead of the edge frequency domain range, the loss of the number of PTRS caused by not mapping the second part in the edge frequency domain range can be avoided, thereby ensuring the number of transmitted PTRS, and further ensuring the phase noise estimation performance, thereby improving the demodulation performance under the condition of phase noise.

[0035] In yet another possible implementation, the method further comprises: receiving indication information, the indication information being used to indicate the frequency domain position of the X resource blocks.

[0036] In yet another possible implementation, the PTRS is mapped on the continuous Y resource blocks in the intermediate frequency domain range within the first bandwidth.

[0037] In the above method, in this way, the phase noise estimation performance can be ensured, thereby improving the demodulation performance under the phase noise condition.

[0038] In a second aspect, an embodiment of the present application provides a communication method, which can be applied to a network device, including can be executed by the network device, can be executed by a component (for example, a processor, a chip, or a chip system, etc.) in the network device, or can be a logic module or software to realize all or part of the network device function, and the method includes: receiving a phase tracking reference signal (PTRS) in a middle frequency domain range in a first bandwidth, and not receiving the PTRS in an edge frequency domain range of the first bandwidth.

[0039] In the above method, in the above way, the PTRS can be received on the subcarrier with strong signal energy, and the PTRS is not received on the subcarrier with weak signal energy, the correlation parameters of the receiving end are ensured, the PTRS mapped on the subcarrier with strong signal energy is better received, and the phase noise estimation performance of the receiving end is ensured. In summary, in the above way, the phase noise estimation performance can be improved, thereby improving the demodulation performance under the phase noise condition.

[0040] In a possible implementation, the first bandwidth is a scheduling bandwidth N RB or a partial scheduling bandwidth The partial scheduling bandwidth is a part of the scheduling bandwidth N RB .

[0041] In the above method, when the first bandwidth is the scheduling bandwidth, it can be applied to the case where the scheduling bandwidth is scheduled, or can be applied to the case where the total bandwidth is scheduled, when the first bandwidth is the partial scheduling bandwidth, it can be applied to the bandwidth extension and the case where the partial scheduling bandwidth is scheduled, in summary, when the first bandwidth is the scheduling bandwidth or the partial scheduling bandwidth, the adaptability of the system can be ensured.

[0042] In another possible implementation, the scheduling bandwidth N RB corresponds to a number of subcarriers equal to a number of data modulation symbols plus a number of PTRSs to be mapped in the scheduling bandwidth N RB ; or the partial scheduling bandwidth corresponds to a number of subcarriers equal to a number of data modulation symbols plus a number of PTRSs to be mapped in the partial scheduling bandwidth ; wherein the indicates a number of subcarriers included in one resource block.

[0043] In yet another possible implementation form, the edge frequency domain range comprises K0 and / or K1 subcarriers, and / or the edge frequency domain range comprises N0 and / or N1 resource blocks, wherein the K0, the K1, the N0, the N1 are integers greater than or equal to 0.

[0044] Optionally, the K0 can be equal to the K1, and the N0 can be equal to the N1, in this way, the system design can be simplified.

[0045] Optionally, the K0 can not be equal to the K1, and the N0 can not be equal to the N1, in this way, the flexibility of the system can be improved.

[0046] In the above method, by not mapping the PTRS in the edge frequency domain range within the first bandwidth, it can be ensured that the PTRS is not mapped on the subcarriers with weak signal energy, and the relevant parameters of the receiving end are ensured, so that the receiving end avoids receiving the PTRS on the subcarriers with weak signal energy, thereby affecting the phase noise estimation performance, and further avoiding reducing the demodulation performance. In summary, by the above method, the phase noise estimation performance can be improved, thereby improving the demodulation performance under the phase noise condition.

[0047] In yet another possible implementation form, the first bandwidth comprises a scheduling bandwidth N RB The intermediate frequency domain range comprises a range of subcarrier indexes, and the range of subcarrier indexes comprises The intermediate frequency domain range comprises a range of resource block indexes, and the range of resource block indexes comprises [N0, N RB The first bandwidth comprises a partial scheduling bandwidth The intermediate frequency domain range comprises a range of subcarrier indexes, and the range of subcarrier indexes comprises The intermediate frequency domain range comprises a range of resource block indexes, and the range of resource block indexes comprises Wherein, the The number of subcarriers included in one resource block is represented by NRB.

[0048] In the above method, by mapping the PTRS in the intermediate frequency domain range within the first bandwidth, it can be ensured that the PTRS is mapped on the subcarriers with strong signal energy, and the relevant parameters of the receiving end are ensured, so that the PTRS mapped on the subcarriers with strong signal energy is better received, thereby ensuring the phase noise estimation performance of the receiving end. In summary, by the above method, the phase noise estimation performance can be improved, thereby improving the demodulation performance under the phase noise condition.

[0049] In yet another possible implementation form, when the first bandwidth is a partial scheduling bandwidth The K0 = 0 and / or the K1 = 0; or the first bandwidth is a partial scheduling bandwidth When the N0=0 and / or the N1=0.

[0050] Optionally, the K0 can be equal to the K1, and the N0 can be equal to the N1, in this way, the system design can be simplified.

[0051] Optionally, the K0 can not be equal to the K1, and the N0 can not be equal to the N1, in this way, the flexibility of the system can be improved.

[0052] In the above method, by the way of not mapping the PTRS in the edge frequency domain range within the first bandwidth, it can be guaranteed that the PTRS is not mapped on the subcarriers with weak signal energy, and the relevant parameters of the receiving end are guaranteed, so that the receiving end avoids receiving the PTRS on the subcarriers with weak signal energy, thereby affecting the phase noise estimation performance, and further avoiding reducing the demodulation performance. In summary, by the above-mentioned manner, the phase noise estimation performance can be improved, thereby improving the demodulation performance under the phase noise condition.

[0053] In another possible implementation manner, the intermediate frequency domain range includes M SC subcarriers and / or M RB resource blocks; the first bandwidth includes a scheduling bandwidth N RB , the intermediate frequency domain range includes a range of subcarrier indexes, the range of subcarrier indexes includes or a range of resource block indexes of the intermediate frequency domain range includes or or the first bandwidth includes a partial scheduling bandwidth the intermediate frequency domain range includes a range of subcarrier indexes, the range of subcarrier indexes includes or the intermediate frequency domain range includes a range of resource block indexes, the range of resource block indexes includes or wherein, the indicates the number of subcarriers included in one resource block.

[0054] In the above method, by the way of mapping the PTRS in the intermediate frequency domain range within the first bandwidth, it can be guaranteed that the PTRS is mapped on the subcarriers with strong signal energy, and the relevant parameters of the receiving end are guaranteed, so that the PTRS mapped on the subcarriers with strong signal energy is better received, thereby guaranteeing the phase noise estimation performance of the receiving end. In summary, by the above-mentioned manner, the phase noise estimation performance can be improved, thereby improving the demodulation performance under the phase noise condition.

[0055] In another possible implementation manner, the first bandwidth is a partial scheduling bandwidth , the and the MSC relationship between the K0, the K1, the M or the first bandwidth is a partial scheduling bandwidth , the and the M RB relationship between the K0, the K1, the M

[0056] In yet another possible implementation, the starting position of the PTRS mapping in the intermediate frequency domain range is equal to a subcarrier reference starting position plus a first offset; and / or the starting position of the PTRS mapping in the intermediate frequency domain range is equal to a resource block reference starting position plus a second offset.

[0057] In yet another possible implementation, the relationship between the K0, the K1, the M SC , the N RB relationship between the K0, the K1, the M wherein the indicates a number of subcarriers included in one resource block; and / or the relationship between the K0, the K1, the M SC , the N relationship between the K0, the K1, the M wherein the indicates a number of subcarriers included in one resource block.

[0058] In yet another possible implementation, one or more of the following is related to a first parameter, the one or more of the following comprising: the K0, the K1, the N0, the N1, the M SC or the M RB ; wherein the first parameter comprises a roll-off factor and / or a bandwidth extension factor.

[0059] In the above method, by the above manner, dynamic adjustment of performance can be achieved.

[0060] In yet another possible implementation, a PTRS density parameter satisfies one or more of the following, wherein the PTRS density parameter is a parameter adopted when the PTRS is mapped into an intermediate frequency domain range within a first bandwidth, the one or more of the following comprising: the PTRS density parameter is predefined; the PTRS density parameter is related to one or more of the following parameters, the one or more of the following parameters comprising: the K0, the K1, the N RB , the N the M SC or the M RB ; or the PTRS density parameter is related to a first parameter, the first parameter comprising a roll-off factor and / or a bandwidth extension factor.

[0061] In the above method, by increasing the density of the PTRS, the loss of the number of PTRS caused by the fact that the second part is not mapped in the edge frequency domain range can be avoided, thereby ensuring the number of transmitted PTRS, and further ensuring the phase noise estimation performance, thereby improving the demodulation performance under the condition of phase noise.

[0062] In yet another possible implementation, the PTRS includes a first part and a second part; the receiving the phase tracking reference signal, PTRS, in the middle frequency domain range within the first bandwidth includes: receiving the first part in the PTRS in the middle frequency domain range within the first bandwidth; the not receiving the PTRS in the edge frequency domain range of the first bandwidth includes: not receiving the second part in the PTRS in the edge frequency domain range of the first bandwidth; the method further includes: receiving the second part in the PTRS on X resource blocks in the middle frequency domain range within the first bandwidth, wherein the number of PTRS corresponding to the second part is equal to the X.

[0063] In the above method, by mapping the second part in the middle frequency domain range instead of the edge frequency domain range, the loss of the number of PTRS caused by the fact that the second part is not mapped in the edge frequency domain range can be avoided, thereby ensuring the number of transmitted PTRS, and further ensuring the phase noise estimation performance, thereby improving the demodulation performance under the condition of phase noise.

[0064] In yet another possible implementation, the method further includes: transmitting indication information, the indication information being used to indicate the frequency domain position of the X resource blocks.

[0065] In yet another possible implementation, the PTRS is mapped on continuous Y resource blocks in the middle frequency domain range within the first bandwidth.

[0066] In the above method, by such a manner, the phase noise estimation performance can be ensured, thereby improving the demodulation performance under the condition of phase noise.

[0067] In a third aspect, an embodiment of the present application provides a communication apparatus, which can be a terminal device, or a component (for example, a processor, a chip, or a chip system, etc.) in the terminal device, or a logic module or software capable of realizing all or part of the functions of the terminal device.

[0068] In a possible implementation, the communication apparatus can include a module or unit corresponding to each of the methods / operations / steps / actions described in the first aspect, which can be a hardware circuit, or software, or a combination of hardware circuit and software.

[0069] In a possible implementation, the communication apparatus comprises: a processing unit, configured to determine a phase tracking reference signal (PTRS); and a transceiver unit, configured to map the PTRS into a middle frequency domain range within a first bandwidth, and not to map the PTRS into an edge frequency domain range within the first bandwidth.

[0070] In a possible implementation, the first bandwidth is a scheduling bandwidth N RB or a partial scheduling bandwidth The partial scheduling bandwidth is a part of the scheduling bandwidth N RB .

[0071] In another possible implementation, the first bandwidth is a scheduling bandwidth N RB corresponding to a number of subcarriers equal to a number of data modulation symbols plus a number of PTRSs needed to be mapped within the scheduling bandwidth N RB ; or the partial scheduling bandwidth corresponding to a number of subcarriers equal to a number of data modulation symbols plus a number of PTRSs needed to be mapped within the partial scheduling bandwidth ; wherein the denotes a number of subcarriers included in one resource block.

[0072] In another possible implementation, the edge frequency domain range includes K0 and / or K1 subcarriers, and / or the edge frequency domain range includes N0 and / or N1 resource blocks, wherein the K0, the K1, the N0, and the N1 are integers greater than or equal to 0.

[0073] In another possible implementation, the first bandwidth includes a scheduling bandwidth N RB , and the middle frequency domain range includes a range of subcarrier indexes, which includes the middle frequency domain range includes a range of resource block indexes, which includes [N0, N RB - N1]; or the first bandwidth includes a partial scheduling bandwidth the middle frequency domain range includes a range of subcarrier indexes, which includes the middle frequency domain range includes a range of resource block indexes, which includes wherein the denotes a number of subcarriers included in one resource block.

[0074] In another possible implementation, the first bandwidth is a partial scheduling bandwidth K0=0 and / or K1=0; or the first bandwidth is a partial scheduling bandwidth N0=0 and / or N1=0.

[0075] In yet another possible implementation, the intermediate frequency domain range comprises M SC subcarriers and / or M RB resource blocks; the first bandwidth comprises a scheduling bandwidth N RB The intermediate frequency domain range comprises a range of subcarrier indices, which range of subcarrier indices comprises Or The intermediate frequency domain range comprises a range of resource block indices, which range of resource block indices comprises Or Or the first bandwidth comprises a partial scheduling bandwidth The intermediate frequency domain range comprises a range of subcarrier indices, which range of subcarrier indices comprises Or The intermediate frequency domain range comprises a range of resource block indices, which range of resource block indices comprises Or Wherein, the denotes a number of subcarriers comprised by one resource block.

[0076] In yet another possible implementation, the first bandwidth is a partial scheduling bandwidth When the relationship between the M SC comprises: Or the first bandwidth is a partial scheduling bandwidth When the relationship between the M RB comprises:

[0077] In yet another possible implementation, a starting position of the PTRS mapping in the intermediate frequency domain range is equal to a subcarrier reference starting position plus a first offset; and / or a starting position of the PTRS mapping in the intermediate frequency domain range is equal to a resource block reference starting position plus a second offset.

[0078] In yet another possible implementation, a relationship between the K0, the K1, the M SC , the N RB comprises: Wherein, the denotes a number of subcarriers comprised by one resource block; and / or a relationship between the K0, the K1, the M SC , the N comprises: Wherein, the indicates a number of subcarriers included in a resource block.

[0079] In yet another possible implementation, the one or more of the following is related to the first parameter, the one or more of the following includes: K0, K1, N0, N1, M SC or M RB ; wherein the first parameter includes a roll-off factor and / or a bandwidth extension factor.

[0080] In yet another possible implementation, the PTRS density parameter satisfies one or more of the following, wherein the PTRS density parameter is a parameter employed when mapping the PTRS into the middle frequency domain range within the first bandwidth, the one or more of the following includes: the PTRS density parameter is predefined; the PTRS density parameter is related to one or more of the following, the one or more of the following includes: K0, K1, N RB 、 M SC or M RB ; or the PTRS density parameter is related to a first parameter, the first parameter includes a roll-off factor and / or a bandwidth extension factor.

[0081] In yet another possible implementation, the PTRS includes a first part and a second part; the processing unit is configured to map the first part in the PTRS into the middle frequency domain range within the first bandwidth; the processing unit is configured to not map the second part in the edge frequency domain range within the first bandwidth; the processing unit is further configured to map the second part onto X resource blocks of the middle frequency domain range within the first bandwidth, wherein a number of PTRSs corresponding to the second part is equal to the X.

[0082] In yet another possible implementation, the transceiving unit is further configured to receive indication information, the indication information being used to indicate a frequency domain location of the X resource blocks.

[0083] In yet another possible implementation, the PTRS is mapped onto a continuous Y resource blocks of the middle frequency domain range within the first bandwidth.

[0084] As to the technical effects brought by the third aspect or possible implementation, reference can be made to the introduction of the technical effects of the first aspect or corresponding implementation.

[0085] In a fourth aspect, an embodiment of the present application provides a communication apparatus, which can be a network device, a component (for example, a processor, a chip, or a chip system, etc.) in the network device, or a logic module or software capable of realizing all or part of the network device functions.

[0086] In a possible implementation, the communication apparatus can include modules or units corresponding to the method / operation / step / action described in the second aspect, which can be hardware circuit, software or a combination of hardware circuit and software.

[0087] In a possible implementation, the communication apparatus includes a processing unit and a transceiver unit, the transceiver unit configured to receive a phase tracking reference signal (PTRS) in an intermediate frequency domain range within a first bandwidth, and not to receive the PTRS in an edge frequency domain range of the first bandwidth.

[0088] In a possible implementation, the first bandwidth is a scheduling bandwidth N RB or a partial scheduling bandwidth The partial scheduling bandwidth is a part of the scheduling bandwidth N RB .

[0089] In another possible implementation, the scheduling bandwidth N RB corresponds to a number of subcarriers equal to a number of data modulation symbols plus a number of PTRSs needed to be mapped within the scheduling bandwidth N RB ; or the partial scheduling bandwidth corresponds to a number of subcarriers equal to a number of data modulation symbols plus a number of PTRSs needed to be mapped within the partial scheduling bandwidth ; wherein the denotes a number of subcarriers included in one resource block.

[0090] In another possible implementation, the edge frequency domain range includes K0 and / or K1 subcarriers, and / or the edge frequency domain range includes N0 and / or N1 resource blocks, wherein the K0, the K1, the N0, the N1 are integers greater than or equal to 0.

[0091] In another possible implementation, the first bandwidth includes a scheduling bandwidth N RB , and the intermediate frequency domain range includes a range of subcarrier indices, which includes the intermediate frequency domain range includes a range of resource block indices, which includes [N0, N RB - N1]; or the first bandwidth includes a partial scheduling bandwidth the intermediate frequency domain range includes a range of subcarrier indices, which includes the intermediate frequency domain range includes a range of resource block indices, which includes wherein the represents a number of subcarriers included in one resource block.

[0092] In yet another possible implementation, the first bandwidth is a partial scheduling bandwidth , the K0=0 and / or the K1=0; or the first bandwidth is a partial scheduling bandwidth , the N0=0 and / or the N1=0.

[0093] In yet another possible implementation, the intermediate frequency domain range includes M SC subcarriers and / or M RB resource blocks; the first bandwidth includes a scheduling bandwidth N RB , the intermediate frequency domain range includes a range of subcarrier indices, the range of subcarrier indices includes , or the intermediate frequency domain range includes a range of resource block indices, the range of resource block indices includes , or , or the first bandwidth includes a partial scheduling bandwidth , the intermediate frequency domain range includes a range of subcarrier indices, the range of subcarrier indices includes , or the intermediate frequency domain range includes a range of resource block indices, the range of resource block indices includes , or wherein the represents a number of subcarriers included in one resource block.

[0094] In yet another possible implementation, the first bandwidth is a partial scheduling bandwidth , the and the M SC , include: , or the first bandwidth is a partial scheduling bandwidth , the and the M RB , include:

[0095] In yet another possible implementation, a starting position of the PTRS mapping in the intermediate frequency domain range is equal to a subcarrier reference starting position plus a first offset; and / or a starting position of the PTRS mapping in the intermediate frequency domain range is equal to a resource block reference starting position plus a second offset.

[0096] In yet another possible implementation, a relationship among the K0, the K1, the M SC , the N RB , includes: wherein the denotes a number of subcarriers included in a resource block; and / or the K0, the K1, the M SC , the relationship between the , the denotes a number of subcarriers included in a resource block.

[0097] In yet another possible implementation, the one or more of the following is related to the first parameter, the one or more of the following includes: the K0, the K1, the N0, the N1, the M SC or the M RB ; wherein the first parameter includes a roll-off factor and / or a bandwidth extension factor.

[0098] In yet another possible implementation, the PTRS density parameter satisfies one or more of the following, wherein the PTRS density parameter is a parameter employed when the PTRS is mapped to a middle frequency range within the first bandwidth, the one or more of the following includes: the PTRS density parameter is predefined; the PTRS density parameter is related to one or more of the following, the one or more of the following includes: the K0, the K1, the N RB , the the M SC or the M RB ; or the PTRS density parameter is related to a first parameter, the first parameter includes a roll-off factor and / or a bandwidth extension factor.

[0099] In yet another possible implementation, the PTRS includes a first part and a second part; the transceiver is configured to receive the first part of the PTRS in a middle frequency range within the first bandwidth; the transceiver is configured to not receive the second part of the PTRS in an edge frequency range of the first bandwidth; the transceiver is further configured to receive the second part of the PTRS on X resource blocks in the middle frequency range within the first bandwidth, wherein a number of PTRSs corresponding to the second part is equal to the X.

[0100] In yet another possible implementation, the transceiver is further configured to send indication information, the indication information being used to indicate a frequency domain location of the X resource blocks.

[0101] In yet another possible implementation, the PTRS is mapped on a continuous Y resource blocks in the middle frequency range within the first bandwidth.

[0102] As to the technical effects brought by the fourth aspect or possible implementation, reference can be made to the introduction of the technical effects of the second aspect or corresponding implementation.

[0103] In a fifth aspect, an embodiment of the present application provides a communication apparatus, which comprises at least one processor and a communication interface, and the at least one processor invokes a computer program or instructions stored in a memory to execute the method in the first aspect or possible implementation manners of the first aspect.

[0104] In a possible implementation, the communication apparatus further comprises the memory. Optionally, the memory and the processor are integrated together.

[0105] In a possible implementation, the memory is located outside the communication apparatus.

[0106] In a sixth aspect, an embodiment of the present application provides a communication apparatus, which comprises at least one processor and a communication interface, and the at least one processor invokes a computer program or instructions stored in a memory to execute the method in the second aspect or possible implementation manners of the second aspect.

[0107] In a possible implementation, the communication apparatus further comprises the memory. Optionally, the memory and the processor are integrated together.

[0108] In a possible implementation, the memory is located outside the communication apparatus.

[0109] In a seventh aspect, an embodiment of the present application provides a chip apparatus, which comprises at least one processor, and the at least one processor is configured to execute a computer program or instructions to implement the method in any one of the aspects or possible implementation manners of any one of the aspects.

[0110] In a possible implementation, an input of the chip apparatus corresponds to the receiving operation in any one of the aspects or possible implementation manners of any one of the aspects, and an output of the chip apparatus corresponds to the sending operation in any one of the aspects or possible implementation manners of any one of the aspects.

[0111] Optionally, the processor is coupled with the memory through an interface.

[0112] Optionally, the chip apparatus further comprises a memory, and the memory stores the computer program or instructions.

[0113] In an eighth aspect, an embodiment of the present application provides a computer readable storage medium, which stores a computer program or instructions, and when the computer program or instructions are run on a processor, a method in any one of the aspects is implemented.

[0114] In a ninth aspect, an embodiment of the present application provides a computer program product, which comprises a computer program or instructions, and when the computer program or instructions are run on a processor, a method in any one of the aspects is implemented.

[0115] In a tenth aspect, embodiments of this application provide a communication system, which includes: the apparatus as described in the fifth aspect and the apparatus as described in the sixth aspect. Attached Figure Description

[0116] Figure 1. Schematic diagram of phase noise power spectral density at different frequencies;

[0117] Figure 2 is a schematic diagram illustrating the effect of different phase noises on the received signal in the frequency domain;

[0118] Figure 3 is a schematic diagram of the architecture of a communication system provided in an embodiment of this application;

[0119] Figure 4 is a schematic diagram of an OFDM system implementation;

[0120] Figure 5 is a schematic diagram of a base station ISAC scenario;

[0121] Figure 6 is a schematic diagram of distance image calculation based on time-domain periodic autocorrelation;

[0122] Figure 7 is a schematic diagram of frequency domain dot product and distance image calculation;

[0123] Figure 8 is a schematic diagram of the function sinc(t);

[0124] Figure 9 is a schematic diagram of a range image with and without FDSS;

[0125] Figure 10 is a schematic diagram of the amplitude of the data carried on the subcarrier with and without FDSS;

[0126] Figure 11 is a flowchart illustrating a communication method provided in an embodiment of this application;

[0127] Figure 12 is a schematic diagram of a PTRS mapping provided in an embodiment of this application;

[0128] Figure 13 shows a K0, K1, M configuration provided in an embodiment of this application. SC N RB A diagram illustrating the relationship between them;

[0129] Figure 14 shows a K0, K1, M configuration provided in an embodiment of this application. SC , A diagram illustrating the relationship between them;

[0130] Figure 15 is a schematic diagram of another PTRS mapping provided in an embodiment of this application;

[0131] Figure 16 is a schematic diagram of another PTRS mapping provided in an embodiment of this application;

[0132] Figure 17 is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0133] FIG. 18 is a structural schematic diagram of another communication apparatus provided by an embodiment of the present application. DETAILED DESCRIPTION

[0134] With reference to the drawings and in light of the description of the embodiments herein, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative work fall within the scope of protection of the present application.

[0135] In the present application, the reference to "one embodiment" or "some embodiments" and the like means that the specific features, structures or characteristics described in connection with the embodiment are included in one or more embodiments of the present application. Thus, the statements "in one embodiment", "in some embodiments", "in other embodiments", "in additional embodiments" and the like appearing in various places in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically stated. The terms "comprise", "include", "have" and their conjugates mean "including but not limited to", unless otherwise specifically stated.

[0136] In the description of the present application, unless otherwise specified, " / " means "or", for example, A / B can mean A or B. "And / or" in this document is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, "at least one" means one or more, and "multiple" means two or more. "At least one of the following" or the like means any combination of the items, including single item or any combination of multiple items. For example, at least one of a, b or c can mean a, b, c; a and b; a and c; b and c; or a and b and c. Where a, b, c can be single or multiple.

[0137] It can be understood that in the present application, "indication" can include direct indication, indirect indication, display indication, and implicit indication. When describing that certain indication information is used to indicate A, it can be understood that the indication information carries A, directly indicates A, or indirectly indicates A.

[0138] In the present application, the information indicated by the indication information is referred to as to-be-indicated information. In the specific implementation process, there are many ways to indicate the to-be-indicated information, for example, but not limited to, the to-be-indicated information can be directly indicated, such as the to-be-indicated information itself or the index of the to-be-indicated information, or the to-be-indicated information can be indirectly indicated by indicating other information, wherein the other information and the to-be-indicated information have an association relationship. It can also only indicate part of the to-be-indicated information, and the other part of the to-be-indicated information is known or agreed in advance. For example, the indication of a specific information can also be achieved by means of the arrangement order of each information agreed in advance (for example, the protocol stipulates), thereby reducing the indication overhead to a certain extent.

[0139] The to-be-indicated information can be sent together as a whole, or can be sent separately into multiple sub-information, and the sending period and / or sending occasion of the sub-information can be the same or different. The specific sending method is not limited in the present application. The sending period and / or sending occasion of the sub-information can be predefined, for example, predefined according to the protocol, or configured by the transmitting end device by sending configuration information to the receiving end device.

[0140] It can be understood that "sending" and "receiving" in the present application represent the direction of signal transmission. For example, "sending information to XX" can be understood as that the destination of the information is XX, which can include direct sending through the air interface, or indirect sending through the air interface by other units or modules. "Receiving information from YY" can be understood as that the source of the information is YY, which can include direct receiving from YY through the air interface, or indirect receiving from YY through the air interface from other units or modules. "Sending" can also be understood as "output" of the chip interface, and "receiving" can also be understood as "input" of the chip interface.

[0141] In other words, the sending and receiving can be between devices, for example, between network devices and terminal devices, or within a device, for example, between components, modules, chips, software modules or hardware modules in the device through a bus, wire or interface.

[0142] It can be understood that the information between the source and the destination of the information sending can be processed as necessary, such as encoding, modulation, etc., but the destination can understand the effective information from the source. Similar expressions in the present application can be understood similarly, and will not be repeated here.

[0143] The communication method provided by the embodiments of the present application can be applied to a third generation partnership project (3rd generation partnership project, 3GPP) related cellular communication system, for example, a fourth generation (4th generation, 4G) communication system, such as a long term evolution (long term evolution, LTE) communication system, and can also be applied to a fifth generation (5th generation, 5G) communication system, such as a 5G new radio (new radio, NR) communication system, or a future various communication system, such as a sixth generation (6th generation, 6G) communication system. The method provided by the embodiments of the present application can also be applied to a Bluetooth system, a wireless fidelity (wireless fidelity, WiFi) system, a LoRa system or a vehicle-to-everything (vehicle-to-everything, V2X) system, a communication system supporting multiple wireless technology fusion, a device-to-device (device-to-device, D2D) system. The method provided by the embodiments of the present application can also be applied to a satellite communication system, which can be integrated with the above communication systems. The wireless communication system related in the present application also includes but is not limited to: a narrow band internet of things (narrow band-internet of things, NB-IoT) system, a global system for mobile communications (global system for mobile communications, GSM) system, an enhanced data rate for GSM evolution (enhanced data rate for GSM evolution, EDGE) system, a wideband code division multiple access (wideband code division multiple access, WCDMA) system, a code division multiple access (code division multiple access, CDMA2000) system, or a time division-synchronous code division multiple access (time division-synchronization code division multiple access, TD-SCDMA) system.

[0144] Please refer to FIG. 3, which is an architecture diagram of a communication system 300 provided by an embodiment of the present application. The application scenario used in the present application is described by taking the architecture of the communication system 300 shown in FIG. 3 as an example. The communication system 300 includes a network device 301 and a terminal device 302. It should be understood that the communication system 300 to which the method of the embodiment of the present application can be applied can include more or fewer network devices or terminal devices. The network device and the terminal device can be hardware, or software functionally divided, or a combination of the two. The network device and the terminal device can communicate through other devices or network elements. In the system, the network device 301 can perform data transmission with multiple terminal devices, that is, the network device 301 sends downlink data to the terminal device 302. Of course, the terminal device 302 can also send uplink data to the network device 301. The apparatus provided by the embodiment of the present application can be applied to the network device 301 or the terminal device 302. It can be understood that FIG. 3 only shows one possible communication system architecture to which the embodiment of the present application can be applied. In other possible scenarios, other devices can also be included in the communication system architecture. The network device 301 can be any one of the example network devices described below. The terminal device 302 can be any one of the example terminal devices described below.

[0145] 1) The network device is a device deployed in a wireless access network to provide wireless communication functions for terminal devices. The network device can also be referred to as a radio access network (RAN) entity, an access node, a network node, or a communication apparatus, etc.

[0146] Specifically, the network device can be an access network device of a 3rd generation partnership project (3GPP) related cellular system. For example, a fourth-generation (4G) mobile communication system or a 5G mobile communication system. The network device can also be an access network device in an open RAN (O-RAN or ORAN) or a cloud radio access network (CRAN). Alternatively, the network device can also be an access network device in a communication system obtained by fusing two or more communication systems.

[0147] The network device includes, but is not limited to, an evolved Node B (eNB), a radio network controller (RNC), a Node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home evolved NodeB or home Node B (HNB), a baseband unit (BBU), an access point (AP) in a wireless fidelity (WiFi) system, a macro base station, a micro base station, a wireless relay node, a donor node, a wireless controller in a CRAN scenario, a wireless backhaul node, a transmission point (TP), or a transmission and receiving point (TRP). The network device can also be an access network device in a 5G mobile communication system. For example, a next generation NodeB (gNB), a TRP, a TP in a new radio (NR) system, or one or a group (including multiple antenna panels) of antenna panels of a base station in a 5G mobile communication system. Alternatively, the network device can also be a network node constituting a gNB or a transmission point. For example, a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), etc. The CU and the DU can be separately arranged or included in the same network element. For example, a BBU. The RU can be included in a radio frequency device or a radio frequency unit. For example, in a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH). Alternatively, the network device can also be a server, a wearable device, a vehicle or a vehicle-mounted device, etc. For example, in V2X technology, the network device can be a road side unit (RSU).

[0148] It should be noted that in different systems, the CU (or CU-CP and CU-UP), DU or RU can also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, the CU can also be referred to as an open centralized unit (O-CU) or an open CU, the DU can also be referred to as an open distributed unit (O-DU), the centralized unit control plane (CU-CP) can also be referred to as an open centralized unit control plane (O-CU-CP) or an open CU-CP, the centralized unit user plane (CU-UP) can also be referred to as an open centralized unit user plane (O-CU-UP) or an open CU-UP, and the RU can also be referred to as an open radio unit (O-RU), which is not limited in the present application. Any one of the CU, CU-CP, CU-UP, DU and RU in the present application can be realized by a software module, a hardware module, or a combination of a software module and a hardware module.

[0149] In some deployments, the CU implements part of the functions of the gNB, and the DU implements part of the functions of the gNB, for example, the CU implements the functions of the radio resource control (RRC) and the packet data convergence protocol (PDCP) layer, and the DU implements the functions of the radio link control (RLC), the media access control (MAC) and the physical (PHY) layer. Since the information of the RRC layer eventually becomes the information of the PHY layer, or is transformed from the information of the PHY layer, under this architecture, high-layer signaling such as RRC layer signaling or PHCP layer signaling can also be considered to be sent by the DU, or sent by the DU+RU. It can be understood that the network device can be a CU node, or a DU node, or a device including a CU node and a DU node. In addition, the CU can be divided into a network device in the access network RAN, or the CU can be divided into a network device in the core network CN, which is not limited here.

[0150] Optionally, the network device can also be a core network device. The core network device is responsible for access control, registration management, service management, mobility management and the like of terminal device accessing the network. For example, the core network device is an AMF.

[0151] It should be noted that the network device can be the device or apparatus shown above, or a component (for example, a chip), a module or a unit in the device or apparatus shown above, and the specific application does not limit it.

[0152] 2) terminal device, also known as user equipment (UE), mobile station (MS), mobile terminal (MT), etc., is a device providing voice or data connectivity to a user, specifically, a device providing voice to a user, or a device providing data connectivity to a user, or a device providing voice and data connectivity to a user. For example, it can include a handheld device with wireless connection function, or a processing device connected to a wireless modem. The terminal device can communicate with a core network via a radio access network (RAN), exchange voice or data with the RAN, or interact voice and data with the RAN. Currently, the terminal device can be: a mobile phone, a tablet computer, a notebook computer, a palm computer, a mobile internet device (MID), a wearable device (such as a smart watch, a smart bracelet, a pedometer, etc.), a vehicle-mounted device (such as a car, a bicycle, an electric vehicle, an airplane, a ship, a train, a high-speed rail, etc.), a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a smart home device (such as a refrigerator, a television, an air conditioner, an electricity meter, etc.), a smart robot, a workshop device, a wireless terminal in unmanned driving, a wireless terminal in remote surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, or a wireless terminal in smart home, a flight device (such as a smart robot, a hot air balloon, a drone, an airplane), etc. The terminal device can also be other devices with terminal functions, for example, the terminal device can also be a device with terminal functions in D2D communication.The terminal device can also include a vehicle to everything (V2X) terminal device, a machine to machine / machine-type communications (M2M / MTC) terminal device, an internet of things (IoT) terminal device, a light terminal device, a reduced capability UE (REDCAP UE), a subscriber unit, a subscriber station, a mobile station, a remote station, an access point (AP), a remote terminal, an access terminal, a user terminal, a user agent, or a user device, a drone device, etc. For example, it can include a mobile phone (or called "cellular" phone), a computer with a mobile terminal device, a portable, pocket, handheld, built-in computer mobile device, etc. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), etc. It also includes limited devices, such as devices with lower power consumption, or devices with limited storage capacity, or devices with limited computing capacity, etc. For example, it includes information sensing devices such as bar code, radio frequency identification (RFID), sensor, global positioning system (GPS), laser scanner, etc. In this application, the terminal device with wireless transceiver function and the chip that can be provided in the terminal device are collectively referred to as terminal device.

[0153] It should be noted that the terminal device can be a device or apparatus with a chip, or a device or apparatus integrated with a circuit, or a chip, module or control unit in the above-mentioned device or apparatus, and the specific application is not limited.

[0154] In order to better understand the scheme provided by the embodiments of the present application, the following will first introduce some terms, concepts or processes related to the embodiments of the present application.

[0155] I. Orthogonal frequency division multiplexing (OFDM) technology

[0156] Please refer to FIG. 4, which is a schematic diagram of an implementation of an OFDM system. A transmission signal {S(p)} in the frequency domain is defined. The sending end can convert M consecutive data symbols S(kM), S(kM+1), …, S(kM+M-1) into an M-dimensional data block S(k) through serial-to-parallel conversion (s-to-p) and then perform subcarrier mapping. k = [S(kM), S(kM+1), …, S(kM+M-1)] T The subscript k is the OFDM symbol number, and the superscript T represents matrix transposition. Then, subcarrier mapping is performed, which specifically means that S k carries M data modulates M subcarriers in N subcarriers, or in other words, M subcarriers in N subcarriers carry S k . The remaining (N-M) subcarriers can be understood as being modulated by 0. An N-dimensional data vector x k is obtained through N-point inverse discrete fourier transform (IDFT). k = [x k [0], x k [1], …, x k [N-1]] T . Wherein,

[0157] x k (n), n = 0, 1, …, N-1 can be written as formula (1), as follows:

[0158] Wherein, X k (n′), n′ = 0, 1, …, N-1 represents the output of the subcarrier mapping module, e represents Euler's constant, j represents the imaginary unit, and j 2 = 1. The subcarrier mapping rule is as formula (2), as follows

[0159] Wherein, n0 is an integer, S k (l) is the lth element of S k , l = 0, 1, …, N sc -1.

[0160] Then, P-to-S conversion and cyclic prefix (CP) addition are performed. The CP is added at the beginning of each OFDM symbol to obtain a guard interval, so that inter-symbol interference (ISI) caused by multipath propagation can be eliminated. The CP addition is implemented by copying the last G samples of x k and appending them at the beginning of x k , to obtain the time-domain OFDM signal Thus, one OFDM symbol contains valid data x k and a cyclic prefix (redundant data). Finally, the OFDM signal is converted by a digital to analog converter (DAC) and a radio frequency module, and is transmitted through an antenna. Correspondingly, at the receiving end, demodulation is performed by inverse processing, which is not described in detail here.

[0161] Assuming that time and frequency synchronization is available and the CP length is sufficient, the CP removal operation (i.e., removing the first G samples of the received signal) obtains a data block containing N samples without any ISI, which is also equal to the OFDM symbol x k cyclically convolved with the channel frequency response. By using fast fourier transform (FFT), time-domain cyclic convolution can be converted into frequency-domain point multiplication, and then channel equalization can be completed with low complexity by using frequency-domain one-tap equalization.

[0162] II. Integrated sensing and communications (ISAC)

[0163] Communication is the transmission of information between two or more points, and sensing is the detection of parameters of the physical environment, such as ranging and speed measurement. ISAC is the integration of communication and sensing functions, so that the future communication system has both communication and sensing functions. While transmitting information over the wireless channel, the characteristics of the channel are actively recognized and analyzed, so as to sense the physical characteristics of the surrounding environment, so that the communication and sensing functions are mutually enhanced. For base station ISAC, please refer to FIG. 5, which is a schematic diagram of a base station ISAC scenario. As shown in the figure, the surrounding environment information can be sensed by using the base station signal to assist in designing the communication link, so as to avoid some obstacles (such as buildings) and improve the communication performance.

[0164] Integrated shared waveform design, which uses a single waveform design to simultaneously meet the waveform requirements of communication and sensing signals, is one of the key technologies of ISAC. Leveraging the widespread deployment of cellular networks to reduce the deployment cost of sensing hardware and using existing, appropriately modified communication waveforms to implement ISAC functionality is a promising option. CP-OFDM waveforms, with their advantages of high spectral efficiency and resistance to inter-symbol interference, are widely used.

[0165] The ISAC transmitter transmits an OFDM signal to the target to be sensed. After reflection from the target, the signal generates an echo signal. The echo signal has a time delay relative to the transmitted signal, which is related to the target distance R. Based on this relationship, the time delay can be estimated first, and then the target distance R can be solved. At the ISAC receiver, a range profile can be obtained by performing time-domain or frequency-domain digital signal processing on the echo signal and the transmitted data (the calculation of the range profile is described below). Then, the estimated time delay is obtained by searching for peak values ​​in the range profile.

[0166] III. Delay Estimation and Range Profile Based on Time-Domain Periodic Correlation between Received Signal and (Reconstructed) Local Signal

[0167] Assumptions: The target is static, i.e., its velocity is 0; the echo signal power generated by the p-th (0≤p≤P-1) target is α. p (α p >0), and the relative time delay of the transmitted signal is τ. p One sample; for the sake of convenience in formula derivation, assume τ. p , All are integers, and τ p , Not exceeding the CP length.

[0168] Removing the CP of the echo signal, the noise-free echo signal is equal to The superscript * indicates conjugate. A range profile is generated by performing a time-domain periodic autocorrelation operation between the echo signal and the local OFDM signal (suitable for mono-static sensing scenarios) or the reconstructed OFDM signal (suitable for bi-static sensing scenarios). By searching for the peak value in the range profile, τ can be estimated. p , The specific execution steps are shown in Figure 6, which is a schematic diagram of distance image calculation based on time-domain periodic autocorrelation. For a single-station sensing scenario, the ISAC transmitter and receiver are located at the same position, transmitting data S... k Or OFDM signal x kwhich is ideal known to the ISAC receiver; for bi-static scenario, the ISAC transmitter and the ISAC receiver are not in the same location, the transmitted data S k which is unknown to the ISAC receiver. Therefore, the ISAC receiver needs to estimate the transmitted data first, and the estimation is denoted as Then the transmitted OFDM signal is reconstructed for time delay estimation.

[0169] Using the property of Fourier transform, time domain periodic correlation corresponds to frequency domain point multiplication. Please refer to Fig. 7, which is a diagram of distance image calculation based on frequency domain point multiplication. It should be understood that the echo signal corresponds to the frequency domain signal Based on the subcarrier mapping rule described in equation (2), it can be derived that the frequency domain signal After subcarrier demapping, we get as the input of the point multiplication module.

[0170] When the distance image calculation method shown in Fig. 7 is adopted, equations (3) and (4) give the distance image |χ(τ)| calculation formula in single station and bi-static scenarios, respectively.

[0171] wherein, α represents the proportional symbol.

[0172] wherein, is the lth element of .

[0173] It can be proved that the distance image |χ(τ)| takes a peak value at τ∈{τ0,…,τ P-1}. P-1

[0174] Finally, it is pointed out that the distance image results involved in the present application are all calculated based on equation (3), i.e. all considering the single station sensing scenario.

[0175] Four, main lobe, main lobe width, sidelobe, sidelobe level

[0176] If Skis a sequence of quadrature phase shift keying (QPSK) symbols, then |χ(τ)| is similar to ​Function, thus in order to facilitate the explanation of the main lobe, side lobe and other concepts, please refer to Figure 8, which is a schematic diagram of a function sinc(t). Because sinc(t) is an even function, thus only the t≥0 part is considered. As can be seen from the figure, sinc(t) has many peaks. The highest peak is called the main lobe, and other peaks except the main lobe are called side lobes. The main lobe peak value is defined as the maximum value of the main lobe, as shown in Figure 8, the main lobe peak value is 0dB; the main lobe width is defined as the width between the two half power points (corresponding to -3dB) of the main lobe; according to the order of the appearance of the side lobes, they can be divided into the first side lobe (1 st side lobe), the second side lobe, etc.; for a certain side lobe, the side lobe level is defined as the maximum value of the side lobe. For sinc(t), the side lobe level of the first side lobe is -13.26dB.

[0177] Five, frequency domain windowing, also known as frequency domain spectrum shaping (FDSS)

[0178] By performing FDSS processing on the signal of the sending end, the range image side lobe level can be reduced, and the weak target detection capability can be improved. Specifically, after frequency domain windowing, the range image |χ(τ)| calculation expression becomes

[0179] wherein ω(l), l=0,1,…,N sc -1 represents the window function coefficient, and

[0180] Please refer to FIG. 9, which is a diagram of range profiles with and without FDSS. Assume the transmitted signal is OFDM quadrature phase shift keying (QPSK) signal. There are two targets, denoted as target 1 and target 2. The echo signal power of target 1 is 30 dB higher than that of target 2. The relative time delay between the echo signal of target 1 and the transmitted signal is 12 samples, while that between the echo signal of target 2 and the transmitted signal is 75 samples. FIG. 9 shows the range profile when only target 1 exists and there is no FDSS; the range profile when both target 1 and target 2 exist and there is no FDSS; the range profile when only target 1 exists and there is FDSS; and the range profile when both target 1 and target 2 exist and there is FDSS. It can be seen that, without FDSS, the main lobe of the range profile of target 2 (located at τ = 75) is lower than the side lobe of the range profile of target 1 (located at τ = 29). This can cause the side lobe of the range profile of target 1 to be mistakenly considered as the position of target 2. With FDSS, the side lobe is suppressed to a level low enough to be below the level of the main lobe of the range profile of target 2. At this time, the range profile when both target 1 and target 2 exist and there is FDSS contains two relatively large peaks, located at the positions of target 1 and target 2, respectively. Thus, the weak target 2 can be correctly estimated.

[0181] The perception capability can be improved by performing FDSS processing on the signal of the transmitting end, but the communication performance is impaired. Frequency domain FDSS can be regarded as a kind of subcarrier level power distribution. In combination with formula (5) and formula (3), it can be seen that, after performing FDSS processing on the signal of the transmitting end, the data energy carried on the l+n0th subcarrier becomes |S k (l)| 2 from the original |S k (l)| 2 |ω R (l)| 2 . If S k (l) is a QPSK symbol, i.e., |S k (l) | = 1, and ω T (l) is an RRC with a roll-off factor of 0.2 and a length of 720, please refer to FIG. 10, which is a diagram of the amplitudes of data carried on subcarriers with and without FDSS. It can be seen that, by performing FDSS processing on the signal of the transmitting end, the energy of the middle subcarriers is improved, while the energy of the edge subcarriers is reduced, which affects the reception performance of the signals on the edge subcarriers.

[0182] At present, high frequencies, for example, 6 gigahertz (GHz) and above frequency bands, mainly including 28 GHz, 39 GHz, 60 GHz, 73 GHz, etc., are used to solve the growing communication demand because of their rich frequency resources. Its significant feature is to include a large bandwidth and a high-integrated antenna array to achieve high throughput, but there will be serious radio frequency distortion problems, such as phase noise (PHN) and carrier frequency offset (CFO). In addition, the Doppler shift of high frequency is also larger, and all of them will introduce phase errors, resulting in the performance degradation of high-frequency communication systems or even unable to work.

[0183] Taking phase noise as an example, as the frequency band increases, the higher the phase noise power spectral density, the greater the impact on the received signal, as shown in FIG. 1 and FIG. 2. When the frequency band is high, the deterioration of phase noise will lead to poor demodulation performance. Therefore, in the existing new radio (NR) protocol, a phase tracking reference signal (PTRS) is introduced in the uplink transmission to compensate for the impact of phase noise and improve the demodulation performance under the condition of phase noise. That is, in order to remove the phase noise, the sending end will insert the PTRS on part of the subcarriers and send the known reference signal, i.e. the PTRS, to the receiving end. The receiving end can estimate the phase noise according to the PTRS and then perform corresponding phase compensation.

[0184] By means of FDSS processing of the signal of the sending end, the sensing function can be improved, but the communication function will be reduced. For example, after the signal of the sending end is processed by FDSS, the signal energy of the PTRS on the edge subcarrier is too low, which will affect the estimation of the phase noise and thus reduce the demodulation performance. In order to solve the above problem, the present application provides the following solutions.

[0185] Please refer to FIG. 11, which is a flowchart of a communication method provided by an embodiment of the present application. The method includes but is not limited to the following steps:

[0186] Step S1101: The terminal device determines the PTRS.

[0187] The terminal device determines the PTRS can refer to generating the PTRS according to the actual number of PTRSes transmitted. For example, a Golden sequence modulated by pi / 2 binary phase shift keying (BPSK), the length of the Golden sequence modulated by pi / 2 BPSK is equal to the actual number of PTRSes transmitted, and the PTRS is generated based on the Golden sequence modulated by pi / 2 BPSK; for another example, a Golden sequence modulated by quadrature phase shift keying (QPSK), the length of the Golden sequence modulated by QPSK is equal to twice the actual number of PTRSes transmitted, and the PTRS is generated based on the Golden sequence modulated by QPSK.

[0188] Step S1102: The terminal device maps the PTRS into a middle frequency domain range within the first bandwidth, and does not map the PTRS into an edge frequency domain range within the first bandwidth.

[0189] Optionally, before performing step S1102, the signal of the receiving end is processed by FDSS.

[0190] The first bandwidth is a scheduling bandwidth NRB or a partial scheduling bandwidth The partial scheduling bandwidth is The partial scheduling bandwidth is a part of the scheduling bandwidth NRB. For example, The coefficient a is less than or equal to 1, for example, The coefficient β is a filter roll-off coefficient. When the first bandwidth is the scheduling bandwidth, it can be applied to the case where the scheduling bandwidth is scheduled, or it can be applied to the case where the total bandwidth is scheduled. When the first bandwidth is the partial scheduling bandwidth, it can be applied to the case of bandwidth expansion and the partial scheduling bandwidth is scheduled. In summary, when the first bandwidth is the scheduling bandwidth or the partial scheduling bandwidth, the adaptability of the system can be ensured.

[0191] The scheduling bandwidth N RB The number of corresponding subcarriers is equal to the number of data modulation symbols plus the number of PTRSes that need to be mapped within the scheduling bandwidth N RB For example, N RB = 5, The number of data modulation symbols within N RB is 54, and the number of PTRSes that need to be mapped within N RB is 6; or, the partial scheduling bandwidth The number of corresponding subcarriers is equal to the number of data modulation symbols plus the number of PTRSes that need to be mapped within the partial scheduling bandwidth For example, The number of internal data modulation symbols is 42. The number of PTRSs that need to be mapped is 6. Among them, This indicates the number of subcarriers included in a resource block.

[0192] Among them, the scheduling bandwidth N RB Data symbols transmitted internally are based on partial scheduling bandwidth. Data symbols generated within. For example, by copying a portion. Data inside On external frequency resources, or for a portion The data inside is conjugate and then copied. On external frequency resources.

[0193] The intermediate frequency domain range includes M SC Subcarriers and / or M RB One resource block. This can be understood as the M... SC Subcarriers and / or M RB PTRS is mapped on each resource block. For example, the M... SC With M RB The relationships between them include: in, This indicates the number of subcarriers included in a resource block. Optionally, the first bandwidth is a partial scheduling bandwidth. With the M SC The relationships between them include: Optionally, the first bandwidth is a portion of the scheduled bandwidth. With M RB The relationships between them include: By mapping the PTRS within the intermediate frequency domain of the first bandwidth, it is possible to ensure that the PTRS is mapped onto subcarriers with strong signal energy, thus guaranteeing the relevant parameters at the receiver. This allows for better reception of the PTRS mapped onto subcarriers with strong signal energy, thereby ensuring the phase noise estimation performance at the receiver. In summary, the above method can improve the phase noise estimation performance, thereby improving the demodulation performance under phase noise conditions.

[0194] The first bandwidth includes the scheduling bandwidth N. RB The intermediate frequency domain range includes the range of the subcarrier index, which includes... or The index range of resource blocks in this intermediate frequency domain includes or In other words, it can be understood that when the scheduling bandwidth N... RB M inside SCWhen the PTRS is mapped on the subcarriers, the subcarrier index k in the middle frequency domain range which maps the PTRS satisfies the following formula:

[0195]

[0196] wherein, is a subcarrier reference offset. K PT-RS is the density of the PTRS, that is, every how many resource blocks (RBs) a PTRS is inserted on a subcarrier. That is, 1 RB has 12 subcarriers. is a reference offset of the RB. i = 0, 1, 2, … represents the i th PTRS. It should be noted that the meanings of various parameters can be referred to the above description, and will not be described hereinafter.

[0197] It can also be understood that when the PTRS is mapped on M RB RBs in the partial scheduling bandwidth N RB , the subcarrier index k in the middle frequency domain range which maps the PTRS satisfies the following formula:

[0198]

[0199] wherein, the first bandwidth includes the partial scheduling bandwidth The middle frequency domain range includes the range of subcarrier indexes, and the range of subcarrier indexes includes or The middle frequency domain range includes the range of resource block indexes, and the range of resource block indexes includes or That is, it can be understood that when the PTRS is mapped on M RBs in the partial scheduling bandwidth N SC , the subcarrier index k in the middle frequency domain range which maps the PTRS satisfies the following formula:

[0200]

[0201] It can also be understood that when the PTRS is mapped on M RBs in the partial scheduling bandwidth N RB , the subcarrier index k in the middle frequency domain range which maps the PTRS satisfies the following formula:

[0202]

[0203] ​​​​The edge frequency domain range includes K0 and / or K1 subcarriers, and / or the edge frequency domain range includes N0 and / or N1 resource blocks. K0, K1, N0, and N1 are integers greater than or equal to 0. Optionally, K0 and K1 may be equal or unequal; this embodiment does not limit this. Optionally, N0 and N1 may be equal or unequal; this embodiment does not limit this. An exemplary relationship between K0 and N0 includes: For example, the relationship between K1 and N1 includes: Optionally, the first bandwidth is a portion of the scheduled bandwidth. At this time, K0 = 0 and / or K1 = 0. Optionally, the first bandwidth is a partial scheduling bandwidth. When N0 = 0 and / or N1 = 0, the system design can be simplified by allowing K0 to be equal to K1 and N0 to be equal to N1. The flexibility of the system can be improved by allowing K0 to be unequal to K1 and N0 to be unequal to N1. By not mapping PTRS in the edge frequency domain within the first bandwidth, it is ensured that PTRS is not mapped on subcarriers with weak signal energy, thus preserving the relevant parameters at the receiver. This prevents the receiver from receiving PTRS on subcarriers with weak signal energy, thereby avoiding impact on phase noise estimation performance and further preventing a reduction in demodulation performance. In summary, the above methods can improve phase noise estimation performance, thereby improving demodulation performance under phase noise conditions.

[0204] The first bandwidth includes the scheduling bandwidth N. RB The intermediate frequency domain range includes the range of the subcarrier index, and the range of the subcarrier index includes... The intermediate frequency domain range includes the range of the resource block index, and the range of the resource block index includes [N0, N]. RB -N1]. This can be understood as, when the scheduling bandwidth N... RB When subcarriers K0 and / or K1 within the range are not mapped to PTRS, the subcarrier index k that maps to PTRS in the intermediate frequency domain satisfies the following formula:

[0205] It can also be understood as, when the scheduling bandwidth N RB When N0 and / or N1 RBs within the range are not mapped to PTRS, the subcarrier index k that maps to PTRS in the intermediate frequency domain satisfies the following formula:

[0206] The first bandwidth includes a portion of the scheduling bandwidth. The intermediate frequency domain range includes the range of the subcarrier index, and the range of the subcarrier index includes... The intermediate frequency domain range includes the range of the resource block index, and the range of the resource block index includes... It can be understood that when K0 and / or K1 subcarriers in the partial scheduling bandwidth do not map the PTRS, the subcarrier index k in the middle frequency domain range which maps the PTRS satisfies the following formula:

[0207] It can also be understood that when N0 and / or N1 RBs in the partial scheduling bandwidth do not map the PTRS, the subcarrier index k in the middle frequency domain range which maps the PTRS satisfies the following formula:

[0208] In an example, referring to FIG. 12, FIG. 12 is a schematic diagram of PTRS mapping provided by an embodiment of the present application, the PTRS is mapped in the middle frequency domain range and not mapped in the edge frequency domain range.

[0209] In a possible implementation, the starting position of the PTRS mapping in the middle frequency domain range is equal to the subcarrier reference starting position plus a first offset. Exemplarily, the subcarrier index k in the middle frequency domain range which maps the PTRS satisfies the following formula:

[0210] Wherein, offset0 represents the first offset. Optionally, when the first bandwidth includes the scheduling bandwidth N RB , Optionally, when the first bandwidth is the partial scheduling bandwidth ,

[0211] The starting position of the PTRS mapping in the middle frequency domain range is equal to the resource block reference starting position plus a second offset. Exemplarily, the subcarrier index k in the middle frequency domain range which maps the PTRS satisfies the following formula:

[0212] Wherein, offset1 represents the second offset. Optionally, when the first bandwidth includes the scheduling bandwidth N RB , Optionally, when the first bandwidth is the partial scheduling bandwidth ,

[0213] In yet another possible implementation, the relationship between K0, K1, M SC , N RB includes:

[0214] Exemplarily, referring to FIG. 13, FIG. 13 is a diagram of K0, K1, M SC , N RB ​​A diagram illustrating the relationship between K0, K1, and M. As shown in the diagram, K0, K1, and M... SC , The relationships between them include:

[0215] For example, please refer to Figure 14. Figure 14 is an embodiment of K0, K1, M provided in this application. SC , A diagram illustrating the relationship between K0, K1, and M. As shown in the diagram, K0, K1, and M... SC N RB The relationships between them include:

[0216] In another possible implementation, one or more of the following are related to the first parameter, including: K0, K1, N0, N1, M. SC Or M RB That is, K0, K1, N0, N1, M SC Or M RB One or more of these parameters are related to the first parameter, which includes the roll-off factor and / or the bandwidth expansion factor. Dynamic performance adjustment can be achieved in this way. In one example, please refer to Figure 15, which is a schematic diagram of another PTRS mapping, for example, scheduling bandwidth N... RB =60, meaning the scheduling bandwidth includes One subcarrier; partial scheduling bandwidth That is, part of the scheduling bandwidth includes There are several subcarriers; then the roll-off factor... As shown in the figure, part of the scheduling bandwidth The 60 subcarriers within the edge frequency domain range, compared to the scheduling bandwidth N RB The energy loss of 60 subcarriers in the edge frequency domain range is related to the first parameter.

[0217] Optional, K0, K1, N0, N1, M SC 、 or M RBOne or more of K0, K1, N0, N1, M SC or M RB may also be configured by the network device. The roll-off factor can refer to a roll-off factor of the FDSS filter. Optionally, the filter can be a raised cosine (RC), root raised cosine (RRC), truncated RRC, two-parameter RC, parametric exponential pulses, parametric linear pulses, parametric“double-Jump”pulses, etc.

[0218] For example, K0, K1, N0, N1, M SC or M RB may also be configured by the network device. The roll-off factor can refer to a roll-off factor of the FDSS filter. Optionally, the filter can be a raised cosine (RC), root raised cosine (RRC), truncated RRC, two-parameter RC, parametric exponential pulses, parametric linear pulses, parametric“double-Jump”pulses, etc. SC , M RB may also be configured by the network device. The roll-off factor can refer to a roll-off factor of the FDSS filter. Optionally, the filter can be a raised cosine (RC), root raised cosine (RRC), truncated RRC, two-parameter RC, parametric exponential pulses, parametric linear pulses, parametric“double-Jump”pulses, etc.

[0219] In an example, when the first bandwidth is a scheduling bandwidth N RB , the scheduling bandwidth includes subcarriers, the partial scheduling bandwidth includes subcarriers, and the roll-off factor is rounded up or down, rounded up or down, rounded up or down. For example, the scheduling bandwidth N RB = 60, i.e., the scheduling bandwidth includes subcarriers, the partial scheduling bandwidth includes 300 subcarriers, and the roll-off factor is rounded up or down, rounded up or down, respectively, e.g., both are rounded down. In an example, when the first bandwidth is a scheduling bandwidth N RB = 60, i.e., the scheduling bandwidth includes subcarriers, the edge frequency domain range includes K0, K1 = 60 subcarriers, the edge frequency domain range includes N0, N1 = 5 RBs, the middle frequency domain range includes M SC = 600 subcarriers, and the middle frequency domain range includes M RB = 50 RBs. In an example, when the first bandwidth is a partial scheduling bandwidth , K0, K1 = 0, N0, N1 = 0. For example, the scheduling bandwidth N RB = 60, i.e., the scheduling bandwidth includes subcarriers; the partial scheduling bandwidth subcarriers; the partial scheduling bandwidth subcarriers; the roll-off factor correspondingly, for example, both are rounded down; That is, it can be understood that, when the first bandwidth is the partial scheduling bandwidth subcarriers; the partial scheduling bandwidth subcarriers, the number K0, K1 of subcarriers included in the edge frequency domain range is 0, the number N0, N1 of RBs included in the edge frequency domain range is 0, and the number M SC = 600, and the number M RB = 50.

[0220] In yet another example, when the first bandwidth is the scheduling bandwidth N RB , rounded up or rounded down, rounded up or rounded down; rounded up or rounded down, rounded up or rounded down. For example, the scheduling bandwidth N RB = 60, that is, the scheduling bandwidth includes subcarriers; the partial scheduling bandwidth subcarriers; the partial scheduling bandwidth subcarriers; the roll-off factor correspondingly, for example, both are rounded down; That is, it can be understood that, when the first bandwidth is the scheduling bandwidth N RB = 60, that is, the scheduling bandwidth includes subcarriers, the number K0, K1 of subcarriers included in the edge frequency domain range is 120, the number N0, N1 of RBs included in the edge frequency domain range is 10, and the number M SC = 480, and the number M RB = 40. In yet another example, when the first bandwidth is the partial scheduling bandwidth , rounded up or rounded down, rounded up or rounded down; rounded up or rounded down, rounded up or rounded down. For example, the scheduling bandwidth N RB = 60, that is, the scheduling bandwidth includes subcarriers; partial scheduling bandwidth That is, the partial scheduling bandwidth includes subcarriers; then the roll-off coefficient Correspondingly, for example, are all rounded down; That is, it can be understood that, when the first bandwidth is a partial scheduling bandwidth That is, the partial scheduling bandwidth includes subcarriers, the number of subcarriers K0, K1 included in the edge frequency domain range is 60, the number of RBs N0, N1 included in the edge frequency domain range is 5, the number of subcarriers M SC included in the middle frequency domain range is 480, and the number of RBs M RB included in the middle frequency domain range is 40.

[0221] Exemplarily, one or more of K0, K1, N0, N1, M SC or M RB and the bandwidth expansion coefficient are related. When the bandwidth expansion coefficient is larger, K0, K1, N0, N1 are larger, and M SC , M RB are smaller.

[0222] In an example, when the first bandwidth is a scheduling bandwidth N RB , is rounded up or down, is rounded up or down, For example, the scheduling bandwidth N RB = 60, that is, the scheduling bandwidth includes subcarriers; partial scheduling bandwidth That is, the partial scheduling bandwidth includes subcarriers; then the bandwidth expansion coefficient Correspondingly, for example, are all rounded down;

[0223] That is, it can be understood that, when the first bandwidth is a scheduling bandwidth N RB = 60, that is, the scheduling bandwidth includes subcarriers, the number of subcarriers K0, K1 included in the edge frequency domain range is 60, the number of RBs N0, N1 included in the edge frequency domain range is 5, the number of subcarriers M SC included in the middle frequency domain range is 600, and the number of RBs M RB= 50. In one example, the first bandwidth is a partial scheduling bandwidth When K0, K1= 0, N0, N1= 0, For example, the scheduling bandwidth N RB = 60, i.e., the scheduling bandwidth includes = 50, i.e., the partial scheduling bandwidth includes = 50, i.e., the partial scheduling bandwidth includes = 0, N0, N1= 0, That is, it can be understood that when the first bandwidth is a partial scheduling bandwidth = 50, i.e., the partial scheduling bandwidth includes = 0, N0, N1= 0, SC = 600, the number of RBs included in the middle frequency domain range M RB = 50.

[0224] In yet another example, when the first bandwidth is a scheduling bandwidth N RB = 60, i.e., the scheduling bandwidth includes For example, the scheduling bandwidth N RB = 60, i.e., the scheduling bandwidth includes = 50, i.e., the partial scheduling bandwidth includes = 50, i.e., the partial scheduling bandwidth includes = 0, = 0, That is, it can be understood that when the first bandwidth is a scheduling bandwidth N RB = 60, i.e., the scheduling bandwidth includes = 120, N0, N1= 10, SC = 480, the number of RBs included in the middle frequency domain range M RB = 40. In yet another example, the first bandwidth is a partial scheduling bandwidth = 50, i.e., the partial scheduling bandwidth includes rounded up or down, rounded up or down, For example, the scheduling bandwidth N RB = 60, i.e., the scheduling bandwidth includes = 50, i.e., the partial scheduling bandwidth includes The partial scheduling bandwidth includes subcarriers; accordingly, both are rounded down, That is, it can be understood that when the first bandwidth is a partial scheduling bandwidth The partial scheduling bandwidth includes subcarriers, the number of subcarriers K0, K1 = 60 included in the edge frequency domain range, the number of RBs N0, N1 = 5 included in the edge frequency domain range, the number of subcarriers M SC = 480 included in the middle frequency domain range, and the number of RBs M RB = 40 included in the middle frequency domain range.

[0225] In yet another possible implementation, the PTRS density parameter satisfies one or more of the following, including: the PTRS density parameter is predefined; the PTRS density parameter is related to one or more of the following parameters, including: K0, K1, N RB 、 M SC or M RB ; or the PTRS density parameter is related to a first parameter, including a roll-off factor and / or a bandwidth extension factor. In the above method, by increasing the density of the PTRS, the loss of the number of PTRS caused by the fact that the edge frequency domain range does not map the second part can be avoided, thereby ensuring the number of transmitted PTRS, and further ensuring the phase noise estimation performance, thereby improving the demodulation performance under the condition of phase noise. By increasing the density of the PTRS, the loss of the number of PTRS caused by the fact that the edge frequency domain range does not map the second part can be avoided, thereby ensuring the number of transmitted PTRS, and further ensuring the phase noise estimation performance, thereby improving the demodulation performance under the condition of phase noise.

[0226] The PTRS density parameter is a parameter adopted when the PTRS is mapped to the middle frequency domain range in the first bandwidth. Optionally, the PTRS density parameter can also be referred to as the frequency domain density of the PTRS.

[0227] For example, the PTRS density parameter FDSS_K PT-RS ∈ {1, 2, 3, 4}, and the default value is 1.

[0228] For example, the PTRS density parameter FDSS_K PT-RS is a fixed value, where N RBi (i = 0, 1) are both configured to the terminal device by the network device through radio resource control (RRC) signaling.

[0229] In one example, as shown in Table 1, the PTRS density parameter FDSS_K after FDSS processing at the receiving end is PT-RS with a value of 2 or 3. The PTRS density parameter FDSS_K after FDSS processing at the receiving end is PT-RS equal to the PTRS density parameter NoFDSS_K without FDSS processing at the receiving end PT-RS minus C, i.e., FDSS_K PT-RS = NoFDSS_K PT-RS -C, and optionally, C is an integer greater than or equal to 0. Correspondingly, the subcarrier index k of the PTRS mapped in the middle frequency domain range satisfies the following formula: For example, when NoFDSS_K PT-RS = 2, C = 0, FDSS_K PT-RS = NoFDSS_K PT-RS -C = 2-0 = 2; and for another example, when NoFDSS_K PT-RS = 4, C = 1, FDSS_K PT-RS = NoFDSS_K PT-RS -C = 4-1 = 3. Alternatively, C is related to NoFDSS_K PT-RS , and the greater NoFDSS_K PT-RS is, the greater C is.

[0230] Table 1

[0231] In another example, as shown in Table 2, the PTRS density parameter FDSS_K after FDSS processing at the receiving end is PT-RS with a value of 2 or 3. The PTRS density parameter FDSS_K after FDSS processing at the receiving end is PT-RS equal to the PTRS density parameter NoFDSS_K without FDSS processing at the receiving end PT-RS divided by C and rounded up or down, i.e., or Optionally, C is greater than or equal to 0, and correspondingly, the subcarrier index k of the PTRS mapped in the middle frequency domain range satisfies the following formula: or For example, when NoFDSS_K PT-RS = 2, C = 1, and for another example, when NoFDSS_K PT-RS = 4, C = 1.5, Alternatively, C is related to NoFDSS_K PT-RS , and the greater NoFDSS_K PT-RSThe larger NoFDSS_K is, the larger C is.

[0232] Table 2

[0233] In yet another example, as shown in Table 3, the PTRS density after FDSS processing at the receiving end varies. Correspondingly, the subcarrier index k within the middle frequency domain range mapping the PTRS satisfies the following formula: or For example, when NoFDSS_K PT-RS = 2, C = 2, Since i = 0, 1, 2, …, C = 2. For another example, when NoFDSS_K PT-RS = 4, C = 2, Since i = 0, 1, 2, …, C = 2. Or C is related to NoFDSS_K PT-RS , the larger NoFDSS_K PT-RS is, the larger C is.

[0234] Table 3

[0235] For example, the PTRS density parameter is related to one or more of the following parameters: K0, K1, N RB ,

[0236] M SC or M RB .

[0237] In one example, the PTRS density parameter is related to N RB and , and correspondingly, the subcarrier index k within the middle frequency domain range mapping the PTRS satisfies the following formula: or

[0238] C is greater than or equal to 0. For example, C = 1; for another example, C = 0.8. Or, k satisfies the following formula:

[0239] or

[0240] In yet another example, the PTRS density parameter is related to M SC and , and correspondingly, the subcarrier index k within the middle frequency domain range mapping the PTRS satisfies the following formula: or

[0241] C is greater than or equal to 0. For example, C = 1; or for example, C = 0.8. Alternatively, k satisfies the following formula:

[0242] Or

[0243] In yet another example, the PTRS density parameter is related to M SC and N RB , and correspondingly, the subcarrier index k of the PTRS mapped in the middle frequency domain range within the first bandwidth satisfies the following formula: Or

[0244] C is greater than or equal to 0. For example, C = 1; or for example, C = 0.8. Alternatively, k satisfies the following formula: Or

[0245] In yet another example, the PTRS includes a first part and a second part. The mapping of the PTRS to the middle frequency domain range within the first bandwidth includes: mapping the first part of the PTRS to the middle frequency domain range within the first bandwidth; and not mapping the PTRS in the edge frequency domain range within the first bandwidth, including: not mapping the second part in the edge frequency domain range within the first bandwidth; and the method further includes: mapping the second part to X resource blocks in the middle frequency domain range within the first bandwidth.

[0246] Optionally, the number of PTRSs corresponding to the second part is equal to X.

[0247] Optionally, the network device sends indication information to the terminal device, and correspondingly, the terminal device receives the indication information from the network device, the indication information being used to indicate the frequency domain position of the X resource blocks. Optionally, the frequency domain position of the X resource blocks can be the index of the X resource blocks, or the index of the subcarriers corresponding to the X resource blocks. Optionally, the network device can also indirectly indicate the frequency domain position of the X resource blocks, which is not limited in the embodiments of the present application.

[0248] Optionally, the middle frequency domain range within the first bandwidth is mapped with the PTRS on Y continuous resource blocks. Optionally, Y can be predefined or indicated by the network device, which is not limited in the embodiments of the present application. Optionally, Y is greater than X.

[0249] Optionally, the second part is mapped in the same time domain position as the first part in the middle frequency domain range. It can also be understood that the time domain density of the PTRS used when the second part is mapped in the X resource blocks is the same as the time domain density used when the first part is mapped in the middle frequency domain range.

[0250] In an example, referring to FIG. 16, which is a schematic diagram of another PTRS mapping provided by the embodiments of the present application, it can be seen from the figure that the first bandwidth is 60 RBs, and the edge frequency domain range includes a total of 10 RBs, and the middle frequency domain range includes 50 RBs. The number of PTRSs corresponding to the first part is 25, which are respectively mapped on the 7th, 9th, 11th, 13th, 15th, 17th, 19th, 21st, 23rd, 25th, 27th, 29th, 31st, 33rd, 35th, 37th, 39th, 41st, 43rd, 45th, 47th, 49th, 51st, 53rd, and 55th RBs in the middle frequency domain range. The second part is not mapped on the edge frequency domain range, the number of PTRSs corresponding to the second part is X = 5, and is respectively mapped on the 8th, 10th, 12th, 14th, and 16th RBs in the middle frequency domain range. Optionally, the PTRSs are mapped on the continuous Y = 11 RBs in the middle frequency domain range.

[0251] In the above method, by mapping the second part on the X resource blocks in the middle frequency domain range instead of the edge frequency domain range, the loss of the number of PTRSs caused by not mapping the second part on the edge frequency domain range can be avoided, so that the number of transmitted PTRSs is ensured, and then the phase noise estimation performance is ensured, thereby improving the demodulation performance under the condition of phase noise.

[0252] Step S1103: The terminal device sends the PTRS to the network device.

[0253] Step S1104: The network device receives the PTRS in the middle frequency domain range in the first bandwidth, and does not receive the PTRS in the edge frequency domain range in the first bandwidth.

[0254] In the method described in FIG. 11, by mapping the PTRS in the middle frequency domain range in the first bandwidth and not mapping the PTRS in the edge frequency domain range in the first bandwidth, the PTRS can be mapped on the subcarriers with strong signal energy, and the PTRS is not mapped on the subcarriers with weak signal energy, so that the correlation parameters of the receiving end are ensured, the PTRS mapped on the subcarriers with strong signal energy is better received, and then the phase noise estimation performance of the receiving end is ensured. In summary, by the above method, the phase noise estimation performance can be improved, thereby improving the demodulation performance under the condition of phase noise.

[0255] The above describes the method of the embodiments of the present application in detail, and the apparatus of the embodiments of the present application is provided below.

[0256] Please refer to FIG. 17, which is a structural schematic diagram of a communication apparatus 1700 provided by an embodiment of the present application. The communication apparatus 1700 can include a module or unit corresponding to each of the methods / operations / steps / actions performed by the terminal device or the network device in the above-mentioned method embodiments. The unit can be a hardware circuit, software, or a combination of hardware circuit and software.

[0257] In a possible implementation, the communication apparatus 1700 can include a processing unit 1701 and a transceiver unit 1702, which are specifically as follows.

[0258] The processing unit 1701 is configured to perform data processing. The transceiver unit 1702 can implement corresponding communication functions. The transceiver unit 1702 can also be referred to as a communication interface or a communication module.

[0259] Optionally, the communication apparatus 1700 can further include a storage unit, which can be configured to store instructions and / or data. The processing unit 1701 can read the instructions and / or data in the storage unit, so as to implement the above-mentioned method embodiments.

[0260] Optionally, the transceiver unit 1702 can include a sending unit and a receiving unit. The sending unit is configured to perform the sending operations in the above-mentioned method embodiments. The receiving unit is configured to perform the receiving operations in the above-mentioned method embodiments.

[0261] It should be noted that the communication apparatus 1700 can include the sending unit and not include the receiving unit. Alternatively, the communication apparatus 1700 can include the receiving unit and not include the sending unit. Specifically, whether the sending unit and the receiving unit are included in the communication apparatus 1700 can depend on whether the sending action and the receiving action are included in the above-mentioned scheme performed by the communication apparatus 1700.

[0262] Optionally, the communication apparatus 1700 is configured to perform the actions performed by the terminal device in the above-mentioned embodiment shown in FIG. 11. For details, refer to the related description in the above-mentioned embodiment shown in FIG. 11, which will not be repeated here. For example, the communication apparatus 1700 is configured to perform the following scheme.

[0263] The processing unit 1701 is configured to determine a phase tracking reference signal PTRS. The processing unit 1701 is configured to map the PTRS into a middle frequency domain range within a first bandwidth, and not map the PTRS into an edge frequency domain range within the first bandwidth.

[0264] In a possible implementation, the first bandwidth is a scheduling bandwidth N RB or a partial scheduling bandwidth The partial scheduling bandwidth is a part of the scheduling bandwidth N RB .

[0265] In yet another possible implementation, the scheduling bandwidth N RB corresponding to the number of subcarriers equals the number of data modulation symbols plus the number of PTRSs needed to be mapped within the scheduling bandwidth N RB ; or the partial scheduling bandwidth corresponding to the number of subcarriers equals the number of data modulation symbols plus the number of PTRSs needed to be mapped within the partial scheduling bandwidth ; wherein the denotes the number of subcarriers included in one resource block.

[0266] In yet another possible implementation, the edge frequency domain range includes K0 and / or K1 subcarriers, and / or the edge frequency domain range includes N0 and / or N1 resource blocks, wherein the K0, the K1, the N0, the N1 are integers greater than or equal to 0.

[0267] In yet another possible implementation, the first bandwidth includes a scheduling bandwidth N RB , the intermediate frequency domain range includes a range of subcarrier indices, the range of subcarrier indices includes the intermediate frequency domain range includes a range of resource block indices, the range of resource block indices includes [N0, N RB -1]; or the first bandwidth includes a partial scheduling bandwidth the intermediate frequency domain range includes a range of subcarrier indices, the range of subcarrier indices includes the intermediate frequency domain range includes a range of resource block indices, the range of resource block indices includes wherein the denotes the number of subcarriers included in one resource block.

[0268] In yet another possible implementation, when the first bandwidth is a partial scheduling bandwidth , the K0=0 and / or the K1=0; or when the first bandwidth is a partial scheduling bandwidth , the N0=0 and / or the N1=0.

[0269] In yet another possible implementation, the intermediate frequency domain range includes M SC subcarriers and / or M RB resource blocks; the first bandwidth includes a scheduling bandwidth N RB , the intermediate frequency domain range includes a range of subcarrier indices, the range of subcarrier indices includes or the intermediate frequency domain range includes a range of resource block indices, the range of resource block indices includes or Or the first bandwidth comprises a partial scheduling bandwidth The intermediate frequency domain range comprises a range of subcarrier indexes, the range of subcarrier indexes comprising Or The intermediate frequency domain range comprises a range of resource block indexes, the range of resource block indexes comprising Or Wherein, the Indicates the number of subcarriers included in one resource block.

[0270] In yet another possible implementation, the first bandwidth is a partial scheduling bandwidth When the Relationship between the M SC Comprises: Or the first bandwidth is a partial scheduling bandwidth When the Relationship between the M RB Comprises:

[0271] In yet another possible implementation, the starting position of the PTRS mapping in the intermediate frequency domain range is equal to the subcarrier reference starting position plus a first offset; and / or the starting position of the PTRS mapping in the intermediate frequency domain range is equal to the resource block reference starting position plus a second offset.

[0272] In yet another possible implementation, the relationship between the K0, the K1, the M SC , the N RB Comprises: Wherein, the Indicates the number of subcarriers included in one resource block; and / or the relationship between the K0, the K1, the M SC , the Comprises: Wherein, the Indicates the number of subcarriers included in one resource block.

[0273] In yet another possible implementation, one or more of the following is related to the first parameter, the one or more of the following comprising: K0, K1, N0, N1, M SC Or M RB ; wherein the first parameter comprises a roll-off coefficient and / or a bandwidth extension coefficient.

[0274] In a further possible implementation, the PTRS density parameter satisfies one or more of the following, wherein the PTRS density parameter is a parameter employed when mapping the PTRS into the middle frequency domain range within the first bandwidth, the one or more of the following include: the PTRS density parameter is predefined; the PTRS density parameter is related to one or more of the following, the one or more of the following include: K0, K1, N RB 、 M SC or M RB ; or the PTRS density parameter is related to a first parameter, the first parameter includes a roll-off factor and / or a bandwidth extension factor.

[0275] In a further possible implementation, the PTRS includes a first part and a second part; the processing unit 1701 is configured to map the first part in the PTRS into the middle frequency domain range within the first bandwidth; the processing unit 1701 is configured to not map the second part in the edge frequency domain range within the first bandwidth; the processing unit 1701 is further configured to map the second part onto X resource blocks in the middle frequency domain range within the first bandwidth, wherein a number of PTRSs corresponding to the second part is equal to the X.

[0276] In a further possible implementation, the transceiver unit 1702 is further configured to receive indication information, the indication information being used to indicate frequency domain locations of the X resource blocks.

[0277] In a further possible implementation, the PTRS is mapped onto a continuous Y resource blocks in the middle frequency domain range within the first bandwidth.

[0278] It should be noted that the implementation and advantages of each module can also be referred to the corresponding description of the method embodiment shown in FIG. 11.

[0279] Optionally, the communication apparatus 1700 is configured to perform the actions performed by the network device in the embodiments shown in FIG. 11. Details can be referred to the related description in the embodiments shown in FIG. 11, which will not be described here in detail. For example, the communication apparatus 1700 is configured to perform the following scheme:

[0280] The transceiver unit 1702 is configured to receive a phase tracking reference signal (PTRS) in a middle frequency domain range within a first bandwidth, and not receive the PTRS in an edge frequency domain range of the first bandwidth.

[0281] In a possible implementation, the first bandwidth is a scheduling bandwidth N RB or a partial scheduling bandwidth The partial scheduling bandwidth is a part of the scheduling bandwidth N RB .

[0282] In yet another possible implementation, the scheduling bandwidth N RB corresponds to a number of subcarriers equal to a number of data modulation symbols plus a number of PTRSs needed to be mapped within the scheduling bandwidth N RB ; or the partial scheduling bandwidth corresponds to a number of subcarriers equal to a number of data modulation symbols plus a number of PTRSs needed to be mapped within the partial scheduling bandwidth ; wherein the denotes a number of subcarriers included in one resource block.

[0283] In yet another possible implementation, the edge frequency domain range includes K0 and / or K1 subcarriers, and / or the edge frequency domain range includes N0 and / or N1 resource blocks, wherein the K0, the K1, the N0, the N1 are integers greater than or equal to 0.

[0284] In yet another possible implementation, the first bandwidth includes a scheduling bandwidth N RB , the intermediate frequency domain range includes a range of subcarrier indices, the range of subcarrier indices includes a range of resource block indices, the range of resource block indices includes [N0, N RB -1]; or the first bandwidth includes a partial scheduling bandwidth , the intermediate frequency domain range includes a range of subcarrier indices, the range of subcarrier indices includes a range of resource block indices, the range of resource block indices includes wherein the denotes a number of subcarriers included in one resource block.

[0285] In yet another possible implementation, when the first bandwidth is a partial scheduling bandwidth , the K0 = 0 and / or the K1 = 0; or when the first bandwidth is a partial scheduling bandwidth , the N0 = 0 and / or the N1 = 0.

[0286] In yet another possible implementation, the intermediate frequency domain range includes M SC subcarriers and / or M RB resource blocks; the first bandwidth includes a scheduling bandwidth N RB , the intermediate frequency domain range includes a range of subcarrier indices, the range of subcarrier indices includes or a range of indices of resource blocks of the intermediate frequency domain range includes or or the first bandwidth comprises a partial scheduling bandwidth the intermediate frequency domain range comprises a range of subcarrier indices, the range of subcarrier indices comprising or the intermediate frequency domain range comprises a range of resource block indices, the range of resource block indices comprising or wherein the indicates a number of subcarriers included in one resource block.

[0287] In yet another possible implementation, the first bandwidth is a partial scheduling bandwidth when the relationship between the M SC comprises: or the first bandwidth is a partial scheduling bandwidth when the relationship between the M RB comprises:

[0288] In yet another possible implementation, a starting position of the PTRS mapping in the intermediate frequency domain range is equal to a subcarrier reference starting position plus a first offset; and / or a starting position of the PTRS mapping in the intermediate frequency domain range is equal to a resource block reference starting position plus a second offset.

[0289] In yet another possible implementation, a relationship between the K0, the K1, the M SC , the N RB comprises: wherein the indicates a number of subcarriers included in one resource block; and / or a relationship between the K0, the K1, the M SC , the comprises: wherein the indicates a number of subcarriers included in one resource block.

[0290] In yet another possible implementation, one or more of the following is related to a first parameter, the one or more of the following comprising: K0, K1, N0, N1, M SC or M RB ; wherein the first parameter comprises a roll-off coefficient and / or a bandwidth extension coefficient.

[0291] In yet another possible implementation, the PTRS density parameter, when the PTRS is mapped to the middle frequency range within the first bandwidth, satisfies one or more of the following, wherein the PTRS density parameter is a parameter adopted by the PTRS, and the one or more of the following include: the PTRS density parameter is predefined; the PTRS density parameter is related to one or more of the following parameters, including: the K0, the K1, the N RB , the the M SC or the M RB ; or the PTRS density parameter is related to a first parameter, and the first parameter includes a roll-off factor and / or a bandwidth extension factor.

[0292] In yet another possible implementation, the PTRS includes a first part and a second part; the transceiver 1702 is configured to receive the first part of the PTRS in the middle frequency range within the first bandwidth; the transceiver 1702 is configured to not receive the second part of the PTRS in the edge frequency range of the first bandwidth; and the transceiver 1702 is further configured to receive the second part of the PTRS on X resource blocks in the middle frequency range within the first bandwidth, wherein the number of PTRSs corresponding to the second part is equal to the X.

[0293] In yet another possible implementation, the transceiver 1702 is further configured to send indication information, and the indication information is used to indicate the frequency domain location of the X resource blocks.

[0294] In yet another possible implementation, the PTRS is mapped on a continuous Y resource blocks in the middle frequency range within the first bandwidth.

[0295] It should be noted that the implementation and benefits of each module can also be referred to the corresponding description of the method embodiment shown in FIG. 11. The division of the modules in the embodiments of the present application is illustrative, and only a logical functional division. In actual implementation, there can be another division way.

[0296] The processing unit 1701 in the above embodiments can be implemented by at least one processor or processor-related circuit. The transceiver 1702 can be implemented by a transceiver or transceiver-related circuit. The transceiver 1702 can also be referred to as a communication module or a communication interface. The storage module can be implemented by at least one memory.

[0297] Please refer to Fig. 18, which is a structural schematic diagram of a communication apparatus 1800 provided in an embodiment of the present application. The communication apparatus 1800 includes at least one processor 1801 and a communication interface 1803, and optionally further includes a memory 1802. The processor 1801, the memory 1802 and the communication interface 1803 are connected with each other through a bus 1804. Optionally, the processor 1801 can be integrated with the memory 1802.

[0298] The memory 1802 includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read only memory (EPROM), or a compact disc read-only memory (CD-ROM). The memory 1802 is used to store relevant computer programs and data. The communication interface 1803 is used to receive and send data.

[0299] The processor 1801 can be one or more central processing units (CPUs). In the case where the processor 1801 is a CPU, the CPU can be a single-core CPU or a multi-core CPU.

[0300] The processor 1801 in the communication apparatus 1800 is configured to read the computer programs or instructions stored in the memory 1802 to implement the functions of the processing unit. The communication interface 1803 in the communication apparatus 1800 is configured to implement the functions of the transceiver unit.

[0301] An embodiment of the present application further provides a chip device. The chip device includes at least one processor. The processor is configured to invoke computer programs or instructions stored in a memory, so that the processor executes the method provided in the above embodiments.

[0302] In a possible implementation, an input of the chip device corresponds to the receiving operation in any of the above embodiments, and an output of the chip device corresponds to the sending operation in any of the above embodiments.

[0303] Optionally, the processor is coupled with the memory through an interface.

[0304] Optionally, the chip device further includes a memory. The memory stores computer program instructions.

[0305] The embodiment of the present application further provides a computer readable storage medium, wherein a computer program or instructions are stored in the computer readable storage medium, and when the computer program or instructions are run on a processor, the method performed by the terminal device or the network device in the above method embodiment is implemented.

[0306] The embodiment of the present application further provides a computer program product, which comprises a computer program or instructions, and when the computer program or instructions are run on a processor, the method performed by the terminal device or the network device in the above method embodiment is implemented.

[0307] The embodiment of the present application further provides a communication system, which comprises the terminal device in the above embodiment and the network device in the above embodiment. The terminal device is configured to perform part or all of the operations performed by the terminal device in the above method embodiment, and the network device is configured to perform part or all of the operations performed by the network device in the above method embodiment.

[0308] It can be understood that the processor in the embodiment of the present application can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor can be a microprocessor or any conventional processor.

[0309] The method steps in the embodiment of the present application can be realized by a hardware mode or a mode of executing software instructions by a processor. The software instructions can be composed of corresponding software modules, and the software modules can be stored in a random access memory, a flash memory, a read only memory, a programmable read only memory, an erasable programmable read only memory, an electrically erasable programmable read only memory, a register, a hard disk, a mobile hard disk, a CD-ROM or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor, so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in a base station or a terminal. Of course, the processor and the storage medium can also exist as discrete components in the base station or the terminal.

[0310] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer programs or instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are performed. The computer can be a general purpose computer, a special purpose computer, a computer network, a network device, a user equipment or other programmable apparatus. The computer programs or instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer programs or instructions can be transferred from one website site, computer, server or data center to another website site, computer, server or data center through wired or wireless manner. The computer readable storage medium can be any available medium accessible by a computer or a data storage device such as a server, data center and the like integrated with one or more available media. The available media can be a magnetic medium, such as a floppy disk, a hard disk, a magnetic tape; an optical medium, such as a digital video disc; and a semiconductor medium, such as a solid state disk. The computer readable storage medium can be a volatile or non-volatile storage medium, or can include both volatile and non-volatile storage media.

[0311] In various embodiments of the present application, the terms and / or descriptions of different embodiments are consistent and can be referred to each other if there is no special description and logical conflict, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0312] In the description of the present application, the words "first", "second", "S1101" or "S1102" and the like are only used for the purpose of distinguishing the description and the context of the writing, and the different order numbers themselves do not have specific technical meanings, cannot be understood as indicating or implying relative importance, and cannot be understood as indicating or implying the execution order of the operation, and the execution order of each process should be determined according to its function and inherent logic.

Claims

1. A communication method, characterized in that, Applied to terminal devices, including: Determine the phase tracking reference signal PTRS; The PTRS is mapped to the middle frequency domain range within the first bandwidth, and the PTRS is not mapped to the edge frequency domain range within the first bandwidth.

2. The method according to claim 1, characterized in that, The first bandwidth is the scheduling bandwidth N RB or partial scheduling bandwidth The portion of the scheduling bandwidth is The scheduling bandwidth N RB Part of it.

3. The method according to claim 2, characterized in that, The scheduling bandwidth N RB The corresponding number of subcarriers Equals the number of data modulation symbols plus the scheduled bandwidth N RB The number of PTRSs that need to be mapped; or The portion of the scheduling bandwidth The corresponding number of subcarriers Equals the number of data modulation symbols plus the scheduled bandwidth in the specified portion. The number of PTRSs that need to be mapped internally; Among them, the This indicates the number of subcarriers included in a resource block.

4. The method according to any one of claims 1-3, characterized in that, The edge frequency domain range includes K0 and / or K1 subcarriers, and / or the edge frequency domain range includes N0 and / or N1 resource blocks, wherein K0, K1, N0, and N1 are integers greater than or equal to 0.

5. The method according to claim 4, characterized in that, The first bandwidth includes the scheduling bandwidth N RB The intermediate frequency domain range includes the range of subcarrier indices, and the range of subcarrier indices includes... The intermediate frequency domain range includes the range of the resource block index, and the range of the resource block index includes [N0, N...]. RB -N1]; or The first bandwidth includes a portion of the scheduling bandwidth. The intermediate frequency domain range includes the range of the subcarrier index, and the range of the subcarrier index includes... The intermediate frequency domain range includes the range of the resource block index, and the range of the resource block index includes... Among them, the This indicates the number of subcarriers included in a resource block.

6. The method according to claim 4 or 5, characterized in that, The first bandwidth is a portion of the scheduling bandwidth. When, K0 = 0 and / or K1 = 0; or The first bandwidth is a portion of the scheduling bandwidth. When N0 = 0 and / or N1 = 0.

7. The method according to any one of claims 1-6, characterized in that, The intermediate frequency range includes M SC Subcarriers and / or M RB One resource block; The first bandwidth includes the scheduling bandwidth N RB The intermediate frequency domain range includes the range of subcarrier indices, and the range of subcarrier indices includes... or The index range of the resource blocks in the intermediate frequency domain range includes or or The first bandwidth includes a portion of the scheduling bandwidth. The intermediate frequency domain range includes the range of the subcarrier index, and the range of the subcarrier index includes... or The intermediate frequency domain range includes the range of the resource block index, and the range of the resource block index includes... or Among them, the This indicates the number of subcarriers included in a resource block.

8. The method according to claim 7, characterized in that, The first bandwidth is a portion of the scheduling bandwidth. At that time, the With the M SC The relationships between them include: or The first bandwidth is a portion of the scheduling bandwidth. At that time, the With the M RB The relationships between them include:

9. The method according to any one of claims 1-8, characterized in that, The starting position of the PTRS mapping in the intermediate frequency domain is equal to the subcarrier reference starting position plus a first offset; and / or The starting position of the PTRS mapping in the intermediate frequency domain range is equal to the resource block reference starting position plus a second offset.

10. The method according to any one of claims 7-9, characterized in that, The K0, the K1, the M SC The N RB The relationships between them include: Among them, the Indicates the number of subcarriers included in a resource block; and / or The K0, the K1, the M SC The above The relationships between them include: Among them, the This indicates the number of subcarriers included in a resource block.

11. The method according to any one of claims 7-10, characterized in that, One or more of the following are related to the first parameter, and one or more of the following include: K0, K1, N0, N1, M. SC Or M RB ; The first parameter includes the roll-off factor and / or the bandwidth expansion factor.

12. The method according to any one of claims 7-11, characterized in that, The PTRS density parameter satisfies one or more of the following, wherein the PTRS density parameter is a parameter used when mapping the PTRS to an intermediate frequency domain range within a first bandwidth, and the following one or more include: The PTRS density parameter is predefined; The PTRS density parameter is related to one or more of the following parameters, which include: K0、K1、N RB 、 M SC Or M RB ;or The PTRS density parameter is related to the first parameter, which includes the roll-off factor and / or the bandwidth expansion factor.

13. The method according to any one of claims 1-12, characterized in that, The PTRS comprises a first part and a second part; The step of mapping the PTRS to an intermediate frequency domain range within the first bandwidth includes: Map the first portion of the PTRS to the intermediate frequency domain range within the first bandwidth; The PTRS is not mapped within the edge frequency domain range of the first bandwidth, including: The second part is not mapped within the edge frequency domain range of the first bandwidth; The method further includes: The second part is mapped to X resource blocks in the intermediate frequency domain range within the first bandwidth, wherein the number of PTRS corresponding to the second part is equal to X.

14. The method according to claim 13, characterized in that, The method further includes: Receive indication information, which is used to indicate the frequency domain location of the X resource blocks.

15. The method according to claim 13 or 14, wherein the PTRS is mapped over Y consecutive resource blocks in the intermediate frequency domain range within the first bandwidth.

16. A communication method, characterized in that, Applied to network devices, including: The phase tracking reference signal (PTRS) is received in the intermediate frequency domain range within the first bandwidth, and the PTRS is not received in the edge frequency domain range of the first bandwidth.

17. The method according to claim 16, characterized in that, The first bandwidth is the scheduling bandwidth N RB or partial scheduling bandwidth The portion of the scheduling bandwidth is The scheduling bandwidth N RB Part of it.

18. The method according to claim 17, characterized in that, The scheduling bandwidth N RB The corresponding number of subcarriers Equals the number of data modulation symbols plus the scheduled bandwidth N RB The number of PTRSs that need to be mapped; or The portion of the scheduling bandwidth The corresponding number of subcarriers Equals the number of data modulation symbols plus the scheduled bandwidth in the specified portion. The number of PTRSs that need to be mapped internally; Among them, the This indicates the number of subcarriers included in a resource block.

19. The method according to any one of claims 16-18, characterized in that, The edge frequency domain range includes K0 and / or K1 subcarriers, and / or the edge frequency domain range includes N0 and / or N1 resource blocks, wherein K0, K1, N0, and N1 are integers greater than or equal to 0.

20. The method according to claim 19, characterized in that, The first bandwidth includes the scheduling bandwidth N RB The intermediate frequency domain range includes the range of subcarrier indices, and the range of subcarrier indices includes... The intermediate frequency domain range includes the range of the resource block index, and the range of the resource block index includes [N0, N...]. RB -N1]; or The first bandwidth includes a portion of the scheduling bandwidth. The intermediate frequency domain range includes the range of the subcarrier index, and the range of the subcarrier index includes... The intermediate frequency domain range includes the range of the resource block index, and the range of the resource block index includes... Among them, the This indicates the number of subcarriers included in a resource block.

21. The method according to claim 19 or 20, characterized in that, The first bandwidth is a portion of the scheduling bandwidth. When, K0 = 0 and / or K1 = 0; or The first bandwidth is a portion of the scheduling bandwidth. When N0 = 0 and / or N1 = 0.

22. The method according to any one of claims 16-21, characterized in that, The intermediate frequency range includes M SC Subcarriers and / or M RB One resource block; The first bandwidth includes the scheduling bandwidth N RB The intermediate frequency domain range includes the range of subcarrier indices, and the range of subcarrier indices includes... or The index range of the resource blocks in the intermediate frequency domain range includes or or The first bandwidth includes a portion of the scheduling bandwidth. The intermediate frequency domain range includes the range of the subcarrier index, and the range of the subcarrier index includes... or The intermediate frequency domain range includes the range of the resource block index, and the range of the resource block index includes... or Among them, the This indicates the number of subcarriers included in a resource block.

23. The method according to claim 22, characterized in that, The first bandwidth is a portion of the scheduling bandwidth. At that time, the With the M SC The relationships between them include: or The first bandwidth is a portion of the scheduling bandwidth. At that time, the With the M RB The relationships between them include:

24. The method according to any one of claims 16-23, characterized in that, The starting position of the PTRS mapping in the intermediate frequency domain is equal to the subcarrier reference starting position plus a first offset; and / or The starting position of the PTRS mapping in the intermediate frequency domain range is equal to the resource block reference starting position plus a second offset.

25. The method according to any one of claims 22-24, characterized in that, The K0, the K1, the M SC The N RB The relationships between them include: Among them, the Indicates the number of subcarriers included in a resource block; and / or The K0, the K1, the M SC The above The relationships between them include: Among them, the This indicates the number of subcarriers included in a resource block.

26. The method according to any one of claims 22-25, characterized in that, One or more of the following are related to the first parameter, and one or more of the following include: K0, K1, N0, N1, M. SC Or M RB ; The first parameter includes the roll-off factor and / or the bandwidth expansion factor.

27. The method according to any one of claims 22-26, characterized in that, The PTRS density parameter satisfies one or more of the following, wherein the PTRS density parameter is a parameter used when the PTRS is mapped to an intermediate frequency domain range within a first bandwidth, and the following one or more include: The PTRS density parameter is predefined; The PTRS density parameter is related to one or more of the following parameters, which include: K0, K1, and N. RB The above The M SC Or the M RB ;or The PTRS density parameter is related to the first parameter, which includes the roll-off factor and / or the bandwidth expansion factor.

28. The method according to any one of claims 16-27, characterized in that, The PTRS comprises a first part and a second part; Receiving the phase tracking reference signal PTRS within the intermediate frequency domain range of the first bandwidth includes: The first portion of the PTRS is received within the intermediate frequency domain range of the first bandwidth; The step of not receiving the PTRS within the edge frequency domain range of the first bandwidth includes: The second portion of the PTRS is not received within the edge frequency domain range of the first bandwidth; The method further includes: The second portion of the PTRS is received on X resource blocks within the intermediate frequency domain range of the first bandwidth, wherein the number of PTRS corresponding to the second portion is equal to X.

29. The method according to claim 28, characterized in that, The method further includes: Send indication information, which is used to indicate the frequency domain location of the X resource blocks.

30. The method according to claim 28 or 29, wherein the PTRS is mapped over Y consecutive resource blocks in the intermediate frequency domain range within the first bandwidth.

31. A communication device, characterized in that, Includes modules or units for performing the method as described in any one of claims 1 to 30.

32. A communication device, characterized in that, Includes a processor for running a computer program to cause the communication device to perform the method as described in any one of claims 1 to 30.

33. The communication device according to claim 32, characterized in that, The communication device further includes a memory for storing the computer program.

34. A chip, characterized in that, Includes a processor configured to perform the method as described in any one of claims 1 to 30.

35. A computer-readable storage medium, characterized in that, Used to store computer programs that, when run on a computer, cause the computer to perform the method as described in any one of claims 1 to 30.

36. A computer program product, characterized in that, The computer program product includes one or more computer programs that, when run on a computer, cause the computer to perform the method as described in any one of claims 1 to 30.

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