Broadband signal identification method and device, electronic equipment and readable storage medium

Abstract

The invention relates to a broadband signal identification method and device, electronic equipment and a readable storage medium, and the method comprises the steps: obtaining a receiving signal containing a demodulation reference signal, the receiving signal comprises at least one OFDM symbol, and any OFDM symbol is divided into a plurality of resource block groups; for any resource block group, acquiring a first signal correlation value indicating the intra-group signal correlation degree, and acquiring a second signal correlation value indicating the inter-group signal correlation degree based on the resource block group and the adjacent resource block group; and identifying whether the demodulation reference signal is a broadband signal according to the difference degree between the first signal correlation value and the second signal correlation value corresponding to the at least one resource block group in the at least one OFDM symbol.

Description

Technical Field

[0001] The present disclosure relates to the field of wireless communication technologies, and in particular, to a method, apparatus, electronic device, and readable storage medium for identifying broadband signals. Background Art

[0002] In a new radio (NR) system, if the demodulation reference signal (DMRS) in the physical downlink shared channel (PDSCH) is a narrowband signal, then parameter and channel estimation can only be performed through a frequency-domain scheme based on PDSCH-DMRS. If PDSCH-DMRS is a broadband signal, then the frequency-domain signal can be transformed into the time domain for parameter and channel estimation, providing a new feasible scheme for parameter and channel estimation. Therefore, it becomes particularly important to identify whether PDSCH-DMRS is a broadband signal. Summary of the Invention

[0003] To overcome the problems in the related art, the present disclosure provides a method, apparatus, electronic device, and readable storage medium for identifying broadband signals.

[0004] According to a first aspect of an embodiment of the present disclosure, a method for identifying a broadband signal is provided, including:

[0005] Obtaining a received signal including a demodulation reference signal, where the received signal includes at least one orthogonal frequency division multiplexing (OFDM) symbol, and any one OFDM symbol is divided into a plurality of resource block groups;

[0006] For any one of the resource block groups, obtaining a first signal correlation value indicating the correlation degree of signals within the group, and based on the resource block group and adjacent resource block groups, obtaining a second signal correlation value indicating the correlation degree of signals between the groups;

[0007] Identifying whether the demodulation reference signal is a broadband signal according to the difference degree between the first signal correlation value and the second signal correlation value corresponding to at least one resource block group in at least one OFDM symbol.

[0008] According to a second aspect of an embodiment of the present disclosure, a device for identifying a broadband signal is provided, including:

[0009] A signal acquisition module, configured to obtain a received signal including a demodulation reference signal, where the received signal includes at least one orthogonal frequency division multiplexing (OFDM) symbol, and any one OFDM symbol is divided into a plurality of resource block groups;

[0010] A determination module, configured to obtain, for any resource block group, a first signal correlation value indicating the degree of signal correlation within the group, and based on the resource block group and adjacent resource block groups, obtain a second signal correlation value indicating the degree of signal correlation between the groups;

[0011] An identification module, configured to identify whether the demodulation reference signal is a wideband signal according to the degree of difference between the first signal correlation value and the second signal correlation value corresponding to at least one resource block group in at least one OFDM symbol.

[0012] According to a third aspect of the embodiments of the present disclosure, there is provided an electronic device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the wideband signal identification method provided in the first aspect is implemented.

[0013] According to a fourth aspect of the embodiments of the present disclosure, there is provided a computer-readable storage medium, on which computer program instructions are stored. When the program instructions are executed by a processor, the steps of the wideband signal identification method provided in the first aspect of the present disclosure are implemented.

[0014] According to a fifth aspect of the embodiments of the present disclosure, there is provided a chip, including a processor and an interface; the processor is configured to read instructions to execute the wideband signal identification method provided in the first aspect of the present disclosure.

[0015] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects:

[0016] In this application, a received signal including a demodulation reference signal is obtained. The received signal includes at least one orthogonal frequency division multiplexing (OFDM) symbol, and any OFDM symbol is divided into multiple resource block groups; for any resource block group, a first signal correlation value indicating the degree of signal correlation within the group is obtained, and based on the resource block group and adjacent resource block groups, a second signal correlation value indicating the degree of signal correlation between the groups is obtained; according to the degree of difference between the first signal correlation value and the second signal correlation value corresponding to at least one resource block group in at least one OFDM symbol, it is identified whether the demodulation reference signal is a wideband signal. Based on the characteristic that the same precoding matrix is used within the resource block group, the first signal correlation value and the second signal correlation value corresponding to the resource block group are calculated. Based on this, it can be accurately identified whether the demodulation reference signal is a wideband signal based on the degree of difference between the first signal correlation value and the second signal correlation value.

[0017] It should be understood that the above general description and subsequent detailed description are only exemplary and explanatory, and cannot limit the present disclosure. Description of the Drawings

[0018] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments in accordance with the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0019] Figure 1 is a flowchart of a broadband signal identification method shown according to an exemplary embodiment;

[0020] Figure 2 is a schematic diagram of an OFDM symbol shown according to an exemplary embodiment;

[0021] Figure 3 is a flowchart of a broadband signal identification method shown according to another exemplary embodiment;

[0022] Figure 4 is a block diagram of a broadband signal identification device shown according to an exemplary embodiment;

[0023] Figure 5 is a schematic structural diagram of an electronic device shown according to an exemplary embodiment. Detailed implementation manners

[0024] Here, the exemplary embodiments will be described in detail, and the examples are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0025] It should be noted that all actions of obtaining signals, information, or data in this application are carried out on the premise of complying with the corresponding data protection regulations and policies of the country where it is located and obtaining the authorization given by the owner of the corresponding device.

[0026] In the related art, the channel impulse response (CIR) can be obtained by performing an inverse fast Fourier transform on the frequency-domain data, the peak-to-average ratio of the CIR is calculated, and the peak-to-average ratio is compared with a peak-to-average ratio threshold to identify whether the PDSCH-DMRS is a broadband signal. Generally, when the PDSCH-DMRS is a broadband signal, the corresponding peak-to-average ratio value is larger, and when the PDSCH-DMRS is a narrowband signal, the corresponding peak-to-average ratio value is smaller. However, when the signal-to-noise ratio is large and the PDSCH-DMRS is a narrowband signal, the corresponding peak-to-average ratio value is larger. At this time, when identifying whether the PDSCH-DMRS is a broadband signal based on the peak-to-average ratio threshold, if the peak-to-average ratio threshold is set unreasonably, there is a risk of identifying the PDSCH-DMRS as a broadband signal.

[0027] Based on this, to overcome the problems existing in the related art, the present application proposes a broadband signal recognition method, apparatus, electronic device and readable storage medium.

[0028] Figure 1 It is a flowchart of a broadband signal recognition method shown according to an exemplary embodiment.

[0029] The execution subject of the broadband signal recognition method in the embodiments of the present application is a broadband signal recognition apparatus, which can be set in an electronic device. The electronic device can be a smart phone, a tablet computer, etc., and is not limited in this embodiment.

[0030] As Figure 1 shown, it includes the following steps:

[0031] Step 101, obtain a received signal including a demodulation reference signal.

[0032] Among them, the received signal includes at least one orthogonal frequency division multiplexing (OFDM) symbol, and any OFDM symbol is divided into multiple resource block groups.

[0033] The received signal may refer to a signal sent by a transmitting device, such as a base station, to a receiving device, such as a user equipment (UE), through the PDSCH. The demodulation reference signal may refer to PDSCH-DMRS.

[0034] In a possible implementation manner, the OFDM symbol can be divided into multiple resource block groups based on the resource binding granularity corresponding to the received signal.

[0035] The resource binding granularity can also be referred to as the resource binding size (bundle size). The resource binding granularity can refer to the precoding resource block group (PRG) granularity, or can refer to the physical resource block (PRB) binding granularity.

[0036] The PRG granularity can represent the number of consecutive resource blocks (RB) of the transmitting device using the same precoding matrix, that is, the number of RBs included in each PRG. The RB can refer to the PRB. Assuming the value of the bundle size is m, each PRG includes m RBs; among them, each RB includes n resource elements (RE).

[0037] The PRB binding granularity may indicate the number of PRBs for a receiving device to perform parameter and channel estimation.

[0038] In the embodiments of the present application, the PRG granularity may correspond to the PRB binding granularity. The names of resource bindings may be different on different communication device sides, but their meanings may be the same. For example, usually on the transmitting device side, the resource binding granularity is called the PRG granularity, and the transmitting device uses the same precoding matrix in the same PRG; on the receiving device side, the resource binding granularity is called the PRB binding granularity, and the receiving device performs parameter and channel estimation on the transmission data in the same PRB binding group. For ease of understanding, in the embodiments of the present application, the PRG granularity is used to refer to the resource binding granularity.

[0039] When the transmitting device sends a signal to the receiving device, the resource binding granularity is also carried at the same time. After obtaining the resource binding granularity corresponding to the received signal, any OFDM symbol in the received signal can be divided into N resource block groups according to the resource binding granularity, and the resource block group may refer to the PRG.

[0040] In a possible implementation, the value of the bundle size may be 2 or 4.

[0041] Please refer to Figure 2 , Figure 2 shows a schematic diagram of an OFDM symbol when the bundle size is 2. In the figure, bundle[i] refers to the i-th PRG in the OFDM symbol, and each bundle (PRG) includes 2 RBs. Among them, the value range of i is [0, N - 1].

[0042] Step 102, for any resource block group, obtain a first signal correlation value indicating the correlation degree of signals within the group, and based on the resource block group and adjacent resource block groups, obtain a second signal correlation value indicating the correlation degree of signals between groups.

[0043] In a possible implementation, the signal correlation degree may be understood as the similarity degree between signals.

[0044] The OFDM symbol corresponds to a channel frequency response (CFR), and the CFR can be represented in a complex form, that is, the amplitude response and the phase response. Among them, the amplitude response is used to describe the attenuation of the signal at different frequencies, and the phase response is used to describe the phase delay of the signal during transmission.

[0045] In a possible implementation, the first signal correlation value and the second signal correlation value may be obtained based on the channel frequency response.

[0046] A resource block group includes m resource blocks, and a resource block includes n resource elements. Obtaining a first signal correlation value indicating the degree of signal correlation within the group includes: selecting the (m - 1)-th resource block and the m-th resource block in the resource block group; determining a first inner product according to the channel frequency response value corresponding to the s-th resource element in the (m - 1)-th resource block and the conjugate complex number of the channel frequency response value corresponding to the s-th resource element in the m-th resource block; determining the first signal correlation value according to the n first inner products. Wherein, the value range of s is [1, n].

[0047] Figure 2 Each square in it corresponds to a RE, and the number in each square is the index value of the corresponding RE. Among them, Figure 2 is an example and does not limit the number of REs in the RB.

[0048] In the embodiments of the present application, taking Figure 2 the i-th resource block group bundle[i] in as an example, the method for determining the first signal correlation value is described. Among them, the (m - 1)-th resource block in bundle[i] is RB0, and the m-th resource block is RB1.

[0049] As an example rather than a limitation, the first signal correlation value can be calculated by the following formula:

[0050] A[i] = sum(h[j] * conj(h[j + 6])), j = 0, 1,..., 5

[0051] A[i] is the first signal correlation value corresponding to the i-th PRG, h[j] is the channel frequency response value corresponding to the RE with index value j, h[j + 6] is the channel frequency response value corresponding to the RE with index value j + 6, and the conj function is used to calculate the conjugate complex number of a complex number. Among them, the position of the RE with index value j in RB0 corresponds to the position of the RE with index value j + 6 in RB1. For example, the RE with index value 0 is the first RE in RB0, and the RE with index value 6 is the first RE in RB1.

[0052] In a possible implementation manner, based on the resource block group and an adjacent resource block group, obtaining a second signal correlation value indicating the degree of signal correlation between the groups includes: selecting the first resource block in the adjacent resource block group; determining a second inner product according to the channel frequency response value corresponding to the s-th resource element in the m-th resource block in the resource block group and the conjugate complex number of the channel frequency response value corresponding to the s-th resource element in the first resource block in the adjacent resource block group; determining the second signal correlation value according to the n second inner products.

[0053] Similarly, in the embodiments of the present application, taking Figure 2Taking the \(i\)-th resource block group bundle[i] and its adjacent resource block group bundle[i + 1] in as an example, the method for determining the second signal correlation value is described. Among them, the first resource block in the adjacent resource block group is RB2.

[0054] As an example but not a limitation, the second signal correlation value can be calculated by the following formula:

[0055] B[i]=sum(h[j]*conj(h[j + 6])), j = 6, 7, …11

[0056] B[i] is the second signal correlation value corresponding to the \(i\)-th PRG. The position of the RE with index value j in RB1 and the position of the RE with index value j + 6 in RB2 correspond to each other. For example, the RE with index value 6 is the first RE in RB1, and the RE with index value 12 is the first RE in RB2.

[0057] For any resource block group, determining the first signal correlation value based on the \((m - 1)\)-th resource block and the \(m\)-th resource block in the resource block group, and determining the second signal correlation value based on the \(m\)-th resource block in the resource block group and the first resource block in its adjacent resource block group can avoid the difference in signal correlation values caused by the relatively large distance between signals as much as possible, thereby ensuring the recognition accuracy.

[0058] Step 103: Identify whether the demodulation reference signal is a wideband signal according to the difference degree between the first signal correlation value and the second signal correlation value corresponding to at least one resource block group in at least one OFDM symbol.

[0059] Based on the characteristic that the same precoding matrix is used within the bundle, the following conclusion can be drawn: the correlation degree between the signals carried by the resource blocks within the bundle is relatively high, and the correlation degree between the signals carried by the resource blocks between bundles is relatively low.

[0060] The configured value and the actual value of the bundle size may not be the same. For example, when the bundle size is configured to be 2 or 4 (corresponding to narrowband signals), while the actual bundle size is the full bandwidth (corresponding to wideband signals). Among them, the bundle size being the full bandwidth can be understood as the entire OFDM symbol being a bundle, that is, using one precoding matrix to precode the OFDM symbol.

[0061] Based on the above conclusion, if the actual value of the bundle size is 2 or 4, the precoding matrices corresponding to different bundles are different, and the difference between the first signal correlation value and the second signal correlation value corresponding to the resource block group is relatively large. If the actual value of the bundle size is the full bandwidth, the precoding matrices corresponding to different bundles are the same, and the difference between the first signal correlation value and the second signal correlation value corresponding to the resource block group is relatively small. Therefore, based on the first signal correlation value and the second signal correlation value, it is possible to identify whether the bundle size is the full bandwidth, that is, to identify whether the demodulation reference signal is a wideband signal.

[0062] In a possible implementation, the difference between the first signal correlation value and the second signal correlation value corresponding to any resource block group can be obtained. If the difference is less than the first difference threshold, it is determined that the demodulation reference signal is a wideband signal. If the difference is greater than or equal to the first difference threshold, it is determined that the demodulation reference signal is a narrowband signal.

[0063] In a possible implementation, the differences between the first signal correlation values and the second signal correlation values corresponding to multiple resource block groups can also be obtained, and the average difference is calculated. If the average difference is less than the first difference threshold, it is determined that the demodulation reference signal is a wideband signal. If the average difference is greater than or equal to the first difference threshold, it is determined that the demodulation reference signal is a narrowband signal. Among them, the multiple resource block groups may refer to some or all of the resource block groups corresponding to the received signal.

[0064] In the embodiments of the present application, a received signal including a demodulation reference signal is obtained; for any resource block group, a first signal correlation value indicating the in-group signal correlation degree is obtained, and based on the resource block group and the adjacent resource block group, a second signal correlation value indicating the inter-group signal correlation degree is obtained; according to the difference degree between the first signal correlation value and the second signal correlation value corresponding to at least one resource block group in at least one OFDM symbol, it is identified whether the demodulation reference signal is a wideband signal. Based on the characteristic that the same precoding matrix is used within the bundle in the embodiments of the present application, the first signal correlation value and the second signal correlation value corresponding to the resource block group are calculated. Based on this, it is possible to accurately identify whether the demodulation reference signal is a wideband signal based on the difference degree between the first signal correlation value and the second signal correlation value.

[0065] Figure 3 It is a flowchart of a method for identifying a wideband signal shown according to an exemplary embodiment.

[0066] As Figure 3 shown, it includes the following steps:

[0067] Step 301, obtain a received signal including a demodulation reference signal.

[0068] Step 302: For any resource block group, obtain a first signal correlation value indicating the degree of signal correlation within the group, and based on the resource block group and adjacent resource block groups, obtain a second signal correlation value indicating the degree of signal correlation between groups.

[0069] For the relevant content in Steps 301 - 302, reference can be made to the relevant descriptions in Steps 101 - 102, which will not be elaborated here.

[0070] Step 303: For any OFDM symbol, determine a first value indicating the degree of dispersion of the first signal correlation values corresponding to multiple resource block groups, and determine a second value indicating the degree of dispersion of the second signal correlation values corresponding to multiple resource block groups according to the second signal correlation values corresponding to multiple resource block groups; identify whether the demodulation reference signal is a wideband signal according to the degree of difference between the first value and the second value corresponding to at least one OFDM symbol.

[0071] When the actual value of the bundle size is the full bandwidth, the degree of dispersion of the first signal correlation value and the degree of dispersion of the second signal correlation value are similar, that is, the first value and the second value are similar.

[0072] When the actual value of the bundle size is 2 or 4, the degree of dispersion of the first signal correlation value and the degree of dispersion of the second signal correlation value are quite different, that is, the difference between the first value and the second value is large. Generally, the degree of dispersion of the second signal correlation value is higher than that of the first signal correlation value.

[0073] Based on this, the embodiments of the present application propose to determine the first value and the second value, and identify whether the demodulation reference signal is a wideband signal according to the degree of difference between the first value and the second value.

[0074] Compared with identifying whether the demodulation reference signal is a wideband signal according to the degree of difference between the first signal correlation value and the second signal correlation value, identifying whether the demodulation reference signal is a wideband signal according to the degree of difference between the first value and the second value has less computational complexity and is easier to quantify.

[0075] In a possible implementation manner, the standard deviation or variance of the first signal correlation values corresponding to multiple resource block groups can be calculated to obtain the first value, and the standard deviation or variance of the second signal correlation values corresponding to multiple resource block groups can be calculated to obtain the second value.

[0076] As an example rather than a limitation, the first value and the second value can be obtained through the following formula:

[0077] A_std = sqrt(mean(A[i]^2) – (mean(A[i]))^2)

[0078] B_std = sqrt(mean(B[i]^2) – (mean(B[i]))^2)

[0079] A_std is the first value, B_std is the second value, sqrt is the square root function, and mean is the mean function. Here, i = 0, 1, …, N - 1.

[0080] In a possible implementation, according to the degree of difference between the first value and the second value corresponding to at least one OFDM symbol, identifying whether the demodulation reference signal is a wideband signal includes: obtaining the difference between the first value and the second value corresponding to any one OFDM symbol; if the difference is less than the second difference threshold, determining that the demodulation reference signal is a wideband signal; if the difference is greater than or equal to the first difference threshold, determining that the demodulation reference signal is a narrowband signal.

[0081] In a possible implementation, according to the degree of difference between the first value and the second value corresponding to at least one OFDM symbol, identifying whether the demodulation reference signal is a wideband signal includes: in the case where there are multiple OFDM symbols, determining the first mean according to the first values corresponding to the multiple OFDM symbols; determining the second mean according to the second values corresponding to the multiple OFDM symbols; and identifying whether the demodulation reference signal is a wideband signal according to the degree of difference between the first mean and the second mean.

[0082] Optionally, the multiple OFDM symbols may refer to some or all of the OFDM symbols included in the received signal.

[0083] Identifying the wideband and narrowband signals according to the degree of difference between the first value and the second value corresponding to a single OFDM symbol may have certain contingency and randomness, that is, there may be inaccurate identification. However, identifying the wideband and narrowband signals according to the degree of difference between the first mean and the second mean can avoid the influence of accidental factors on the identification result and has higher accuracy.

[0084] In a possible implementation, according to the degree of difference between the first mean and the second mean, identifying whether the demodulation reference signal is a wideband signal includes: obtaining the difference between the first mean and the second mean; if the difference is less than the second difference threshold, determining that the demodulation reference signal is a wideband signal; if the difference is greater than or equal to the first difference threshold, determining that the demodulation reference signal is a narrowband signal.

[0085] In a possible implementation, the received signal has a signal-to-noise ratio (SNR). Identifying whether the demodulation reference signal is a wideband signal according to the difference degree between the first mean value and the second mean value includes: taking the ratio of the first mean value to the second mean value as the difference degree between the first mean value and the second mean value; in response to the SNR being greater than the set SNR threshold, if the ratio is greater than or equal to the first ratio threshold, determining that the demodulation reference signal is a wideband signal; and / or, in response to the SNR being less than or equal to the set SNR threshold, if the ratio is greater than or equal to the second ratio threshold, determining that the demodulation reference signal is a wideband signal.

[0086] Since the dispersion degrees of the first signal correlation value and the second signal correlation value are similar when the demodulation reference signal is a wideband signal, the ratio of the first mean value to the second mean value when the demodulation reference signal is a wideband signal is closer to 1 than the ratio of the first mean value to the second mean value when the demodulation reference signal is a narrowband signal.

[0087] By way of example and not limitation, the set SNR threshold can be 0, the first ratio threshold can be 0.80, and the second ratio threshold can be 0.93.

[0088] Determining two ratio thresholds according to the SNR, and based on the magnitude relationship between the SNR and the set SNR threshold, selecting the corresponding ratio threshold for comparison to identify whether the demodulation reference signal is a wideband signal can enable the present application to maintain a high identification accuracy in extreme SNR scenarios and will not misjudge a narrowband signal as a wideband signal.

[0089] In a possible implementation, in response to the SNR being greater than the set SNR threshold, if the ratio is less than the first ratio threshold, determining that the demodulation reference signal is a narrowband signal; in response to the SNR being less than or equal to the set SNR threshold, if the ratio is less than the second ratio threshold, determining that the demodulation reference signal is a narrowband signal.

[0090] The above identification process can be summarized as:

[0091] When SNR > TH_snr, if ρ is less than TH_ρ0, it is determined to be narrowband, and if ρ is greater than or equal to TH_ρ0, it is determined to be wideband; when SNR ≤ TH_snr, if ρ is less than TH_ρ1, it is determined to be narrowband, and if ρ is greater than or equal to TH_ρ1, it is determined to be wideband; where TH_snr is the set SNR threshold, ρ is the ratio of the first mean value to the second mean value, TH_ρ0 is the first ratio threshold, and TH_ρ1 is the second ratio threshold.

[0092] In a possible implementation, identifying whether a demodulation reference signal is a wideband signal according to the difference degree between the first mean value and the second mean value includes: when there is a historical signal before receiving the signal, obtaining the first mean value of the historical signal and the second mean value of the historical signal; determining a third mean value according to the first mean values corresponding to the received signal and the historical signal; determining a fourth mean value according to the second mean values corresponding to the received signal and the historical signal; and identifying whether the demodulation reference signal is a wideband signal according to the difference degree between the third mean value and the fourth mean value.

[0093] A single received signal has a certain degree of randomness and contingency. Therefore, to ensure the identification accuracy of this application, embodiments of this application also propose to identify whether a demodulation reference signal is a wideband signal based on multiple received signals.

[0094] The process of determining the third mean value according to the first mean value and determining the fourth mean value according to the second mean value can be understood as a mean filtering process.

[0095] As an example rather than a limitation, the third mean value can be expressed as filter_A_std, the fourth mean value can be expressed as filter_B_std, and the ratio of the third mean value and the fourth mean value can also be expressed as ρ. At this time, ρ = filter_A_std / filter_B_std.

[0096] After obtaining the ratio ρ of the third mean value and the fourth mean value, it is possible to select a corresponding ratio threshold for comparison according to the comparison result between the signal-to-noise ratio and the set signal-to-noise ratio threshold, and then identify whether the demodulation reference signal is a wideband signal.

[0097] In a possible implementation, after obtaining the received signal, the number of the obtained signals can be counted. If the number is less than the number threshold, it is possible to identify whether the demodulation reference signal is a wideband signal according to the ratio of the first mean value and the second mean value corresponding to the received signal; if the number is greater than or equal to the number threshold, it is possible to identify whether the demodulation reference signal is a wideband signal according to the ratio of the third mean value and the fourth mean value. It can be understood that each received signal can correspond to a wideband signal identification result.

[0098] In an embodiment of the present application, a received signal including a demodulation reference signal is obtained; for any resource block group, a first signal correlation value indicating the degree of signal correlation within the group is obtained, and based on the resource block group and adjacent resource block groups, a second signal correlation value indicating the degree of signal correlation between groups is obtained; for any OFDM symbol, according to the first signal correlation values corresponding to multiple resource block groups, a first value indicating the degree of dispersion of the first signal correlation values is determined, and according to the second signal correlation values corresponding to multiple resource block groups, a second value indicating the degree of dispersion of the second signal correlation values is determined; according to the degree of difference between the first value and the second value corresponding to at least one OFDM symbol, it is identified whether the demodulation reference signal is a wideband signal. Based on this, the calculation amount of identifying whether the demodulation reference signal is a wideband signal according to the degree of difference between the first value and the second value in the present application is smaller and easier to quantify.

[0099] Figure 4 FIG. is a schematic structural diagram of a wideband signal identification device provided by an embodiment of the present application.

[0100] As Figure 4 shown, the wideband signal identification device 400 may include:

[0101] A signal acquisition module 410, configured to acquire a received signal including a demodulation reference signal, where the received signal includes at least one orthogonal frequency division multiplexing (OFDM) symbol, and any OFDM symbol is divided into multiple resource block groups;

[0102] A determination module 420, configured to, for any resource block group, acquire a first signal correlation value indicating the degree of signal correlation within the group, and based on the resource block group and adjacent resource block groups, acquire a second signal correlation value indicating the degree of signal correlation between groups;

[0103] An identification module 430, configured to identify whether the demodulation reference signal is a wideband signal according to the degree of difference between the first signal correlation value and the second signal correlation value corresponding to at least one resource block group in at least one OFDM symbol.

[0104] Optionally, the identification module 430 is specifically configured to:

[0105] For any OFDM symbol, according to the first signal correlation values corresponding to multiple resource block groups, determine a first value indicating the degree of dispersion of the first signal correlation values, and according to the second signal correlation values corresponding to multiple resource block groups, determine a second value indicating the degree of dispersion of the second signal correlation values;

[0106] Identify whether the demodulation reference signal is a wideband signal according to the degree of difference between the first value and the second value corresponding to at least one OFDM symbol.

[0107] Optionally, the identification module 430 is specifically configured to:

[0108] In the case where there are multiple OFDM symbols, a first mean value is determined according to the first numerical values corresponding to the multiple OFDM symbols; a second mean value is determined according to the second numerical values corresponding to the multiple OFDM symbols;

[0109] Whether the demodulation reference signal is a wideband signal is identified according to the degree of difference between the first mean value and the second mean value.

[0110] Optionally, the received signal corresponds to a signal-to-noise ratio, and the identification module 430 is specifically configured to:

[0111] Use the ratio of the first mean value to the second mean value as the degree of difference between the first mean value and the second mean value;

[0112] In response to the signal-to-noise ratio being greater than the set signal-to-noise ratio threshold, if the ratio is greater than or equal to the first ratio threshold, it is determined that the demodulation reference signal is a wideband signal;

[0113] In response to the signal-to-noise ratio being less than or equal to the set signal-to-noise ratio threshold, if the ratio is greater than or equal to the second ratio threshold, it is determined that the demodulation reference signal is a wideband signal.

[0114] Optionally, the identification module 430 is specifically configured to:

[0115] In the case where there is a historical signal before the received signal, obtain the first mean value of the historical signal and the second mean value of the historical signal;

[0116] A third mean value is determined according to the first mean values respectively corresponding to the received signal and the historical signal; a fourth mean value is determined according to the second mean values respectively corresponding to the received signal and the historical signal;

[0117] Whether the demodulation reference signal is a wideband signal is identified according to the degree of difference between the third mean value and the fourth mean value.

[0118] Optionally, the OFDM symbol corresponds to a channel frequency response, the resource block group includes m resource blocks, and the resource block includes n resource elements. The determination module 420 is specifically configured to:

[0119] Select the (m - 1)-th resource block and the m-th resource block in the resource block group;

[0120] Determine a first inner product according to the channel frequency response value corresponding to the s-th resource element in the (m - 1)-th resource block and the conjugate complex number of the channel frequency response value corresponding to the s-th resource element in the m-th resource block;

[0121] Determine a first signal correlation value according to the n first inner products.

[0122] Optionally, the determination module 420 is specifically configured to:

[0123] Select the first resource block in the adjacent resource block group;

[0124] Determine a second inner product according to the channel frequency response value corresponding to the s-th resource element in the m-th resource block in the resource block group and the conjugate complex number of the channel frequency response value corresponding to the s-th resource element in the first resource block in the adjacent resource block group;

[0125] Determine a second signal correlation value according to the n second inner products.

[0126] Regarding the device in the above embodiments, the specific manners in which each module performs operations have been described in detail in the embodiments related to the method, and will not be elaborated herein.

[0127] Figure 5 This is a block diagram of an electronic device provided by an embodiment of the present application. For example, the electronic device 500 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0128] Refer to Figure 5 , the electronic device 500 may include one or more of the following components: a processing component 502, a memory 504, a power component 506, a multimedia component 508, an audio component 510, an input / output (I / O) interface 512, a sensor component 514, and a communication component 516.

[0129] The processing component 502 generally controls the overall operation of the electronic device 500, such as operations associated with display, telephone calls, data communication, camera operations, and recording operations. The processing component 502 may include one or more processors 520 to execute instructions to complete all or part of the steps of the above method. In addition, the processing component 502 may include one or more modules to facilitate the interaction between the processing component 502 and other components. For example, the processing component 502 may include a multimedia module to facilitate the interaction between the multimedia component 508 and the processing component 502.

[0130] The memory 504 is configured to store various types of data to support the operation of the electronic device 500. Examples of these data include instructions for any application or method operating on the electronic device 500, contact data, phone book data, messages, pictures, videos, etc. The memory 504 may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, a magnetic disk, or an optical disk.

[0131] The power component 506 provides power for various components of the electronic device 500. The power component 506 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the electronic device 500.

[0132] The multimedia component 508 includes a screen that provides an output interface between the electronic device 500 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors can not only sense the boundaries of the touch or swipe actions, but also detect the duration and pressure associated with the touch or swipe operation. In some embodiments, the multimedia component 508 includes a front camera and / or a rear camera. When the electronic device 500 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each of the front camera and the rear camera can be a fixed optical lens system or have a focal length and optical zoom capabilities.

[0133] The audio component 510 is configured to output and / or input audio signals. For example, the audio component 510 includes a microphone (MIC) that is configured to receive external audio signals when the electronic device 500 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals can be further stored in the memory 504 or transmitted via the communication component 516. In some embodiments, the audio component 510 further includes a speaker for outputting audio signals.

[0134] The I / O interface 512 provides an interface between the processing component 502 and a peripheral interface module, and the peripheral interface module can be a keyboard, a click wheel, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a power button, and a lock button.

[0135] The sensor assembly 514 includes one or more sensors for providing a status assessment of various aspects of the electronic device 500. For example, the sensor assembly 514 can detect the on / off state of the electronic device 500, the relative positioning of components, such as the display and keypad of the electronic device 500. The sensor assembly 514 can also detect a change in the position of the electronic device 500 or a component of the electronic device 500, the presence or absence of user contact with the electronic device 500, the orientation or acceleration / deceleration of the electronic device 500, and the temperature change of the electronic device 500. The sensor assembly 514 can include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 514 can also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 514 can also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0136] The communication component 516 is configured to facilitate communication between the electronic device 500 and other devices in a wired or wireless manner. The electronic device 500 can access a wireless network based on communication standards, such as WiFi, 4G, or 5G, or a combination thereof. In an exemplary embodiment, the communication component 516 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 516 further includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0137] In an exemplary embodiment, the electronic device 500 can be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the above method.

[0138] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 504 including instructions, and the above instructions can be executed by a processor 520 of the electronic device 500 to complete the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, and an optical data storage device, etc.

[0139] To implement the above embodiments, the present application also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, the method described in the foregoing method embodiments is implemented.

[0140] To implement the above embodiments, the present application also provides a chip, including a processor and an interface; the processor is configured to read instructions to execute the method described in the foregoing method embodiments.

[0141] To implement the above embodiments, the present application also provides a computer program product, on which a computer program is stored. When the computer program is executed by a processor, the method described in the foregoing method embodiments is implemented.

[0142] In the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0143] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0144] Any process or method description in the flowchart or described in other ways herein may be understood to represent a module, segment, or part of code including one or more executable instructions for implementing a customized logical function or process. The scope of the preferred embodiments of the present application includes additional implementations, where the functions may be executed in a substantially simultaneous manner or in a reverse order according to the involved functions, rather than in the order shown or discussed, which should be understood by those skilled in the art of the embodiments of the present application.

[0145] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a definitional sequence list of executable instructions for implementing logical functions, which can be specifically implemented in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device), or in conjunction with these instruction execution systems, apparatus, or devices. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer diskette (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium can even be paper or other suitable media on which the program can be printed, because the program can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpretation, or other appropriate processing as necessary, and then storing it in a computer memory.

[0146] It should be understood that various parts of the present application can be implemented by hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits with logic gate circuits for implementing logical functions on data signals, application-specific integrated circuits with appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

[0147] Those of ordinary skill in the art of this technology can understand that all or part of the steps carried by the method of implementing the above embodiments can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiments.

[0148] In addition, each functional unit in various embodiments of the present application may be integrated into a processing module, may exist physically alone for each unit, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. When the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0149] The above-mentioned storage medium may be a read-only memory, a magnetic disk, an optical disc, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as a limitation to the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

[0150] After considering the specification and practicing the present disclosure, those skilled in the art will readily think of other embodiments of the present disclosure. The present disclosure aims to cover any variations, uses, or adaptive changes of the present disclosure, which follow the general principles of the present disclosure and include common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0151] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A broadband signal recognition method, characterized in that, Including: Obtaining a received signal including a demodulation reference signal, where the received signal includes at least one orthogonal frequency division multiplexing (OFDM) symbol, and any OFDM symbol is divided into a plurality of resource block groups; For any resource block group, obtaining a first signal correlation value indicating the correlation degree of signals within the group, and based on the resource block group and adjacent resource block groups, obtaining a second signal correlation value indicating the correlation degree of signals between groups; Identifying whether the demodulation reference signal is a wideband signal according to the difference degree between the first signal correlation value and the second signal correlation value corresponding to at least one resource block group in at least one OFDM symbol.

2. The method according to claim 1, wherein The identifying whether the demodulation reference signal is a wideband signal according to the difference degree between the first signal correlation value and the second signal correlation value corresponding to at least one resource block group in at least one OFDM symbol includes: For any OFDM symbol, determining a first value indicating the dispersion degree of the first signal correlation value according to the first signal correlation values corresponding to a plurality of resource block groups, and determining a second value indicating the dispersion degree of the second signal correlation value according to the second signal correlation values corresponding to a plurality of resource block groups; Identifying whether the demodulation reference signal is a wideband signal according to the difference degree between the first value and the second value corresponding to at least one OFDM symbol.

3. The method according to claim 2, characterized in that The identifying whether the demodulation reference signal is a wideband signal according to the difference degree between the first value and the second value corresponding to at least one OFDM symbol includes: When there are multiple OFDM symbols, determining a first mean value according to the first values corresponding to the multiple OFDM symbols; determining a second mean value according to the second values corresponding to the multiple OFDM symbols; Identifying whether the demodulation reference signal is a wideband signal according to the difference degree between the first mean value and the second mean value.

4. The method according to claim 3, characterized in that, The received signal corresponds to a signal-to-noise ratio. The identifying whether the demodulation reference signal is a wideband signal according to the difference degree between the first mean value and the second mean value includes: Taking the ratio of the first mean value and the second mean value as the difference degree between the first mean value and the second mean value; In response to the signal-to-noise ratio being greater than a set signal-to-noise ratio threshold, if the ratio is greater than or equal to a first ratio threshold, determining that the demodulation reference signal is a wideband signal; In response to the signal-to-noise ratio being less than or equal to the set signal-to-noise ratio threshold, if the ratio is greater than or equal to a second ratio threshold, determining that the demodulation reference signal is a wideband signal.

5. The method according to claim 3, wherein The identifying whether the demodulation reference signal is a wideband signal according to the difference degree between the first mean value and the second mean value includes: When there is a historical signal before the received signal, obtaining the first mean value of the historical signal and the second mean value of the historical signal; Determining a third mean value according to the first mean values corresponding to the received signal and the historical signal respectively; Determining a fourth mean value according to the second mean values corresponding to the received signal and the historical signal respectively; Identify whether the demodulation reference signal is a wideband signal according to the difference degree between the third mean value and the fourth mean value.

6. The method according to any one of claims 1 to 5, characterized in that, The OFDM symbol corresponds to a channel frequency response. The resource block group includes m resource blocks, and each resource block includes n resource elements. The obtaining of the first signal correlation value indicating the signal correlation degree within the group includes: Select the (m - 1)-th resource block and the m-th resource block in the resource block group; Determine a first inner product according to the channel frequency response value corresponding to the s-th resource element in the (m - 1)-th resource block and the conjugate complex number of the channel frequency response value corresponding to the s-th resource element in the m-th resource block; Determine the first signal correlation value according to the n first inner products.

7. The method according to claim 6, wherein The obtaining of the second signal correlation value indicating the signal correlation degree between groups based on the resource block group and the adjacent resource block group includes: Select the first resource block in the adjacent resource block group; Determine a second inner product according to the channel frequency response value corresponding to the s-th resource element in the m-th resource block in the resource block group and the conjugate complex number of the channel frequency response value corresponding to the s-th resource element in the first resource block in the adjacent resource block group; Determine the second signal correlation value according to the n second inner products.

8. A broadband signal recognition device, characterized in that, It includes: A signal acquisition module, configured to acquire a received signal including a demodulation reference signal, where the received signal includes at least one orthogonal frequency division multiplexing (OFDM) symbol, and any OFDM symbol is divided into multiple resource block groups; A determination module, configured to, for any resource block group, obtain a first signal correlation value indicating the signal correlation degree within the group, and based on the resource block group and the adjacent resource block group, obtain a second signal correlation value indicating the signal correlation degree between groups; An identification module, configured to identify whether the demodulation reference signal is a wideband signal according to the difference degree between the first signal correlation value and the second signal correlation value corresponding to at least one resource block group in at least one OFDM symbol.

9. An electronic device, characterized in that, It includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the method according to any one of claims 1 - 7 is implemented.

10. A computer-readable storage medium having computer program instructions stored thereon, characterized in that, When the program instructions are executed by the processor, the method according to any one of claims 1 - 7 is implemented.

11. A chip, characterized in that, It includes a processor and an interface; the processor is configured to read instructions to execute the method according to any one of claims 1 - 7.

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