Spectrum shaping method of non-orthogonal waveform and electronic device

Abstract

The present disclosure provides a spectrum shaping method for non-orthogonal waveforms and an electronic device. The electronic device comprises a processing unit configured to perform discrete Fourier transform expansion on data to be transmitted to obtain an extended signal, perform subcarrier mapping on the extended signal, perform spectrum shaping on the subcarrier using a spectrum shaping factor to obtain a shaped signal, and obtain a non-orthogonal super-Nyquist signal according to the shaped signal; and a sending unit configured to send the non-orthogonal super-Nyquist signal.

Description

Technical Field

[0001] The present disclosure relates to the field of wireless communications, and more particularly to a spectrum shaping method for a non-orthogonal waveform (NOW) and corresponding electronic devices. Background Art

[0002] In order to achieve the extremely high data rate requirements of evolving 5G and 6G, high frequency band related technologies such as millimeter wave (mmWave) and terahertz (THz) frequencies have been regarded as recommended technologies in evolving 5G and 6G communications. The system design of large bandwidth high frequency band is limited by the nonlinearity of power amplifier (PA). High spectral efficiency, high power efficiency and high flexibility should be considered in waveform design to support more schemes. Due to the high peak-to-average power ratio (PAPR), the orthogonal frequency division multiplexing waveform with cyclic prefix (CP-OFDM) will show signal distortion and performance degradation under the influence of power amplifier nonlinearity. In this case, the discrete Fourier transform spread orthogonal frequency division multiplexing waveform (DFT-s-OFDM) applied to 4G and 5G uplink has the advantage of low peak-to-average power ratio and can be regarded as a candidate waveform for evolving 5G and 6G.

[0003] On the other hand, orthogonal waveforms are close to the Shannon limit, and there is very limited room for further improving spectral efficiency. Non-orthogonal beyond Nyquist (FTN) can improve SE by increasing the signal transmission rate at Nyquist. High spectral efficiency and high power efficiency can be achieved by using DFT-s-OFDM and time-domain non-orthogonal FTN (hereinafter, the scheme using DFT-s-OFDM and non-orthogonal time-domain FTN for communication will be referred to as the "NOW" scheme). In the NOW scheme, the conversion between orthogonal waveforms and non-orthogonal waveforms can be performed by adjusting the time domain compression factor, or the time domain compression factor can be adjusted according to different scenarios to achieve high throughput, low PAPR, high reliability and other requirements.

[0004] However, when transmitting in NOW scheme, there is spectrum truncation. Compared with orthogonal waveform CP-OFDM and DFT-s-OFDM, when high spectrum efficiency and high power efficiency are obtained, the signal-to-noise ratio (SNR) loss will be very serious. Summary of the invention

[0005] According to one aspect of the present disclosure, an electronic device is provided. The electronic device includes a processing unit configured to perform discrete Fourier transform expansion on data to be transmitted to obtain an extended signal, perform subcarrier mapping on the extended signal, perform spectrum shaping on the subcarrier using a spectrum shaping factor to obtain a shaped signal, and obtain a non-orthogonal super-Nyquist signal according to the shaped signal; and a sending unit configured to send the non-orthogonal super-Nyquist signal.

[0006] According to another aspect of the present disclosure, a spectrum shaping method for a non-orthogonal waveform is provided, comprising: performing discrete Fourier transform expansion on data to be transmitted to obtain an extended signal; performing subcarrier mapping on the extended signal; performing spectrum shaping on the subcarriers using a spectrum shaping factor to obtain a shaped signal; obtaining a non-orthogonal super-Nyquist signal based on the shaped signal; and transmitting the non-orthogonal super-Nyquist signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The above and other purposes, features and advantages of the present disclosure will become more apparent by describing the embodiments of the present disclosure in more detail in conjunction with the accompanying drawings. The accompanying drawings are used to provide a further understanding of the embodiments of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the present disclosure and do not constitute a limitation of the present disclosure. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0008] Figure 1 is a schematic block diagram showing transmission of a signal using the NOW scheme.

[0009] Figure 2 is a schematic block diagram showing an electronic device according to an embodiment of the present disclosure.

[0010] Figure 3 is a schematic diagram showing the absolute value square of an amplitude shaping factor determined according to a frequency domain value of a root raised cosine function according to an example of the present disclosure.

[0011] Figure 4A-4C 1 is a schematic diagram showing an example of determining an amplitude shaping factor according to power levels of a subcarrier whose spectrum is truncated and a subcarrier whose spectrum is not truncated in FTN modulation according to the present disclosure.

[0012] Figure 5 is a flow chart of a spectrum shaping method for a non-orthogonal waveform according to an embodiment of the present disclosure.

[0013] Figure 6 It is a schematic diagram of the hardware structure of the device involved in the embodiment of the present disclosure. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solutions and advantages of the present disclosure more obvious, the exemplary embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals represent the same elements from beginning to end. It should be understood that the embodiments described herein are merely illustrative and should not be interpreted as limiting the scope of the present disclosure. In addition, the terminal described herein may include various types of terminals, such as user terminals (User Equipment, UE), mobile terminals (or mobile stations) or fixed terminals, however, for convenience, terminals and UEs are sometimes used interchangeably hereinafter.

[0015] Figure 1 is a schematic block diagram showing the transmission of a signal using the NOW scheme. Figure 1 As shown, the transmitting device performs discrete Fourier transform (DFT) expansion on the data to be transmitted to obtain an extended signal. Then, the extended signal is subcarrier mapped to map the extended signal to each subcarrier. Next, the transmitting device performs an inverse fast Fourier transform (IFFT) on each subcarrier, and inserts an extended cyclic prefix into the signal after IFFT, so as to avoid interference between DFT-s-OFDM symbols and support the minimum mean square error decision feedback equalizer (MMSE-DFE, Minimum Mean Square Error-Decision Feedback Equalizer) in the receiving device. Finally, the signal with the cyclic prefix inserted is subjected to non-orthogonal super-Nyquist (FTN) modulation to compress the entire DFT-s-OFDM time domain symbol, and the signal subjected to non-orthogonal super-Nyquist modulation is transmitted through the channel. Specifically, the non-orthogonal super-Nyquist modulation may include upsampling the signal with the cyclic prefix inserted, and pulse shaping the upsampled signal.

[0016] On the other hand, Figure 1 As shown, the receiving device performs non-orthogonal super-Nyquist demodulation on the received signal. Specifically, non-orthogonal super-Nyquist demodulation may include matching filtering the received signal and down-sampling the filtered signal. Then, the cyclic prefix of the signal after non-orthogonal super-Nyquist demodulation is removed, and a fast Fourier transform (FFT) is performed on the signal with the cyclic prefix removed. Next, the receiving device performs minimum mean square error decision feedback equalization and inter-symbol interference elimination on the signal after FFT, and performs subcarrier mapping. Finally, DFT expansion is performed on the mapped signal. Thereby achieving the requirements of high throughput, low PAPR, high reliability, etc.

[0017] As described above, there is a problem of spectrum truncation when transmitting with the NOW scheme. Specifically, by analyzing the signal spectrum of the NOW scheme, the optimal time domain compression factor can be obtained without the useful signal spectrum being truncated, and if the time domain compression factor is less than the optimal value, the useful signal spectrum will be truncated. This results in that when the NOW scheme is used for transmission, although higher spectrum efficiency and high power efficiency can be obtained, the SNR loss is serious. Therefore, a method for reducing spectrum truncation to reduce SNR loss when transmitting using the NOW scheme and a corresponding electronic device are needed.

[0018] In the embodiment of the present disclosure, it is proposed that after subcarrier mapping is performed on the signal to be transmitted, frequency domain spectrum shaping is performed on the subcarrier to reduce the problem caused by spectrum truncation. Figure 2 The electronic device 200 according to an embodiment of the present disclosure is described. Figure 2 is a schematic block diagram showing an electronic device according to an embodiment of the present disclosure. Figure 2 As shown, the sending device 200 according to an embodiment of the present disclosure may include a processing unit 210 and a sending unit 220. In addition to the processing unit and the sending unit, the electronic device 200 may also include other components, however, since these components are irrelevant to the content of the embodiment of the present disclosure, their illustration and description are omitted here.

[0019] like Figure 2 As shown, the processing unit 210 performs discrete Fourier transform expansion on the data to be transmitted to obtain an extended signal, performs subcarrier mapping on the extended signal, performs spectrum shaping on the subcarrier using a spectrum shaping factor to obtain a shaped signal, and obtains a non-orthogonal super-Nyquist signal according to the shaped signal. According to an example disclosed, the spectrum shaping factor may include an amplitude shaping factor. The processing unit 210 may perform spectrum shaping on the subcarrier using the amplitude factor to reduce the power of the subcarrier truncated due to the non-orthogonal super-Nyquist modulation.

[0020] For example, the amplitude shaping factor for each subcarrier may be determined according to the frequency domain value of a specific pulse function. For example, the subcarrier may be spectrally shaped by a root raised cosine function. In this case, the amplitude shaping factor for each subcarrier may be determined according to the frequency domain value of the root raised cosine function. In addition, the amplitude shaping factor may also be determined according to the number of subcarriers truncated in FTN modulation and the total number of subcarriers.

[0021] Figure 3 is a schematic diagram showing the absolute value square of the amplitude shaping factor determined according to the frequency domain value of the root raised cosine function according to an example of the present disclosure. Figure 3 In the example shown, the root raised cosine function h(t) is Fourier transformed to obtain its frequency domain value as shown in the following formula 1:

[0022]

[0023] Where T is the sampling interval, β is the roll-off factor, and N p is the number of subcarriers truncated on one side in FTN modulation, and M is the total number of subcarriers.

[0024] Therefore, as shown in the following formula (2), the absolute value of the amplitude shaping factor for each subcarrier can be obtained according to the frequency domain value of the root raised cosine function h(t): i |:

[0025]

[0026] 2N p is the number of subcarriers truncated in FTN modulation, and the index of the truncated subcarrier is {0≤i≤N p}∪{MN p ≤i≤M-1}, and the index of the subcarrier that is not truncated is {N p <i<MN p}.

[0027] The absolute value of the amplitude shaping factor for each subcarrier |p i | can represent the power allocation weight of the subcarrier, and the sum of the absolute squares of the amplitude shaping factors of all subcarriers is 1, that is, Therefore, the power of each subcarrier can be adjusted by the amplitude shaping factor. Figure 3 As shown, for subcarriers 0 to N that are truncated in FTN modulation p and MN p The absolute value of the amplitude shaping factor to M-1|p i | is small, thereby suppressing the power of the truncated subcarrier. On the other hand, for the subcarrier N that is not truncated in FTN modulation p +1 to MN p The absolute value of the amplitude shaping factor |p i | is larger, that is, the power of the subcarrier that is not truncated is not suppressed. Thus, the power of the subcarrier whose spectrum is truncated is reduced, and the power of the subcarrier that is not truncated will occupy a larger proportion in the total transmission power, improving the signal-to-noise ratio.

[0028] As shown in the following formula (3), the amplitude shaping factor p for each subcarrier can be further obtained according to the above formula (2): i :

[0029]

[0030] where a iis the phase shaping factor in the spectrum shaping factor.

[0031] exist Figure 3 In the example shown, the amplitude shaping factor for each subcarrier is determined directly based on the frequency domain value of a specific pulse function. Alternatively, the amplitude shaping factor for each subcarrier can also be determined based on the frequency domain value of a specific pulse function DFT parameter.

[0032] In addition, according to another example of the present disclosure, the amplitude shaping factor of each subcarrier can be determined according to the power level of the subcarrier whose spectrum is truncated and the subcarrier whose spectrum is not truncated in non-orthogonal super-Nyquist modulation. For example, the amplitude shaping factor may include a first amplitude shaping factor for the subcarrier whose spectrum is truncated in FTN modulation and a second amplitude shaping factor for the subcarrier whose spectrum is not truncated in FTN modulation. The first amplitude shaping factor may be smaller than the second amplitude shaping factor, thereby reducing the power of the subcarrier whose spectrum is truncated, and the power of the subcarrier whose spectrum is not truncated will occupy a larger proportion in the total transmission power, thereby improving the signal-to-noise ratio.

[0033] Figure 4A-4C FIG. 1 is a schematic diagram showing an example of determining an amplitude shaping factor according to the power levels of a subcarrier whose spectrum is truncated and a subcarrier whose spectrum is not truncated in FTN modulation according to the present disclosure. Figure 4A-4C In the example shown, the amplitude shaping factor for the subcarrier whose spectrum is truncated in FTN modulation is the first amplitude shaping factor, and the amplitude shaping factor for the subcarrier whose spectrum is not truncated in FTN modulation is the second amplitude shaping factor. Figure 3 Similar to the example shown, in Figure 4A-4C The absolute value of the amplitude shaping factor of each subcarrier |p i | can represent the power allocation weight of the subcarrier, and the sum of the absolute squares of the amplitude shaping factors of all subcarriers is 1, that is, like Figure 4A-4C As shown, the square of the absolute value of the first amplitude shaping factor is smaller than the square of the absolute value of the second amplitude shaping factor, thereby suppressing the power of the subcarrier whose spectrum is truncated.

[0034] exist Figure 4A In the example shown, an amplitude shaping factor P1 is set for all subcarriers whose spectrum is truncated in FTN modulation, and an amplitude shaping factor P2 is also set for all subcarriers whose spectrum is not truncated in FTN modulation. In other words, the power levels of all subcarriers whose spectrum is truncated in FTN modulation are the same, and the power levels of all subcarriers whose spectrum is not truncated in FTN modulation are the same.

[0035] Alternatively, amplitude shaping factors corresponding to a plurality of power levels may be set for subcarriers whose spectrum is truncated in FTN modulation. Figure 4B As shown, the first amplitude shaping factor for the subcarrier whose spectrum is truncated in FTN modulation includes three elements, namely, P 1-1 To P 1-3 Therefore, the power of a portion of the subcarrier whose spectrum is truncated in FTN modulation can be adjusted to be equal to P 1-1 Corresponding power level, the power of some subcarriers can be adjusted to match P 1-2 The corresponding power level, and the power of the remaining subcarriers whose spectrum is truncated in FTN modulation can be adjusted to be consistent with P 1-3 The first amplitude shaping factor includes three elements P 1-1 To P 1-3 Both are smaller than the amplitude shaping factor P2 for the subcarrier whose spectrum is not truncated in FTN modulation.

[0036] Similarly, amplitude shaping factors corresponding to multiple power levels may be set for subcarriers whose spectrum is not truncated in FTN modulation. Figure 4C As shown, the second amplitude shaping factor for the subcarrier whose spectrum is not truncated in FTN modulation includes three elements, namely, P 2-1 To P 2-3 Therefore, the power of a portion of the subcarriers whose spectrum is not truncated in FTN modulation can be adjusted to be equal to P 2-1 Corresponding power level, the power of some subcarriers can be adjusted to match P 2-2 The corresponding power level, and the power of the remaining subcarriers whose spectrum is not truncated in FTN modulation can be adjusted to be consistent with P 2-3 The second amplitude shaping factor includes three elements P 2-1 To P 2-3 Both are greater than the amplitude shaping factor P1 for the subcarrier whose spectrum is truncated in FTN modulation.

[0037] In addition, amplitude shaping factors corresponding to multiple power levels may be set for subcarriers whose spectrum is not truncated in FTN modulation and truncated subcarriers. The amplitude shaping factors set for subcarriers whose spectrum is truncated in FTN modulation may be smaller than the amplitude shaping factors set for subcarriers whose spectrum is not truncated in FTN modulation.

[0038] return Figure 2According to another example of the present disclosure, the spectrum shaping factor may further include a phase shaping factor, and the processing unit 210 may further use the phase factor to perform spectrum shaping on the subcarrier to reduce the impact of non-orthogonal super-Nyquist modulation on the high peak-to-average power ratio. For example, the spectrum shaping factor may be a phase set An element in .

[0039] After the processing unit 210 obtains the spectrum shaping signal, it can determine the non-orthogonal super-Nyquist signal according to the shaping signal. And the sending unit 220 can send according to the determined non-orthogonal super-Nyquist signal. For example, referring to Figure 1 As shown in the schematic diagram, the processing unit 210 can perform spectrum shaping after subcarrier mapping, and perform inverse fast Fourier transform (IFFT), insert an extended cyclic prefix, and perform non-orthogonal super-Nyquist (FTN) modulation on the spectrum shaped signal. Accordingly, the receiving device can perform the above combined Figure 2-4C This is the opposite of the spectrum shaping described in . For example, in Figure 1 In the schematic block diagram of transmitting a signal using the NOW scheme, the receiving device may perform a process opposite to the spectrum shaping described above after performing minimum mean square error decision feedback equalization on the signal after FFT.

[0040] In the electronic device according to the present disclosure, by performing spectrum shaping on a signal to be transmitted, the power of the spectrum truncated portion can be suppressed, the SNR is improved, and the out-of-band leakage is reduced.

[0041] According to an embodiment of the present disclosure, the electronic device 200 may default to performing spectrum shaping on the signal to be sent, unless information indicating that spectrum shaping is not to be performed is received, and vice versa. For example, the electronic device 200 may further include a receiving unit. The receiving unit may receive shaping indication information indicating whether to perform spectrum shaping. The processing unit 210 may determine whether to perform spectrum shaping on the subcarrier using the spectrum shaping factor to obtain a shaped signal according to the received shaping indication information. For example, whether the electronic device 200 performs spectrum shaping may be indicated by high-layer signaling such as radio resource control (RRC) signaling or downlink control information (DCI).

[0042] According to an embodiment of the present disclosure, the spectrum shaping factor may be preset. Alternatively, information about the spectrum shaping factor may also be received, wherein the information about the spectrum shaping factor may indicate the spectrum shaping factor implicitly or explicitly.

[0043] For example, the electronic device 200 may further include a receiving unit. The receiving unit may receive a reference signal such as a channel reference signal, and the processing unit 210 may determine a spectrum shaping factor according to the reference signal. For another example, the receiving unit may receive transfer function type information and information about a time domain compression factor of non-orthogonal super-Nyquist modulation. The processing unit 210 may determine the spectrum shaping factor according to the transfer function type information and the information about the time domain compression factor of non-orthogonal super-Nyquist modulation. Specifically, the processing unit 210 may determine a subcarrier whose spectrum is truncated according to the time domain compression factor, and obtain a spectrum shaping factor according to the subcarrier whose spectrum is truncated.

[0044] In addition, the power allocation vectors for the subcarriers whose spectrum is truncated and the subcarriers whose spectrum is not truncated can be pre-set according to the time domain compression factor of the non-orthogonal super-Nyquist modulation, and the codebook corresponding to the power allocation vector can be stored. Thus, the processing unit 210 can determine the amplitude spectrum shaping factor based on the codebook of the power allocation vector according to the time domain compression factor received by the receiving unit.

[0045] In addition, when the processing unit 210 determines the amplitude shaping factor of each subcarrier according to the power level of the subcarrier whose spectrum is truncated and the subcarrier whose spectrum is not truncated in the non-orthogonal super-Nyquist modulation, the power level table of the subcarrier whose spectrum is truncated and the subcarrier whose spectrum is not truncated can be pre-set according to the time domain compression factor of the non-orthogonal super-Nyquist modulation. For example, the number of subcarriers in each power level can be determined according to the proportion of different power levels in the area where the spectrum is truncated or not truncated. For another example, when the time domain compression factor is a non-ideal time domain compression factor, the number of subcarriers in each power level can be pre-set. The receiving unit can receive information about the proportion of different power levels, so that the processing unit 210 can determine the amplitude spectrum shaping factor based on the pre-set power level table according to the proportion of different power levels.

[0046] In addition, the receiving unit may also receive a high-layer signaling such as RRC to indicate the phase spectrum shaping factor.

[0047] Below, refer to Figure 5 The spectrum shaping method of the non-orthogonal waveform according to the embodiment of the present disclosure is described. Figure 5 5 is a flow chart of a spectrum shaping method 500 for a non-orthogonal waveform according to an embodiment of the present disclosure. Since the steps of the signal envelope acquisition method 500 correspond to the operation of the electronic device 200 described above with reference to the figure, detailed description of the same contents is omitted here for simplicity.

[0048] like Figure 5As shown, in step S501, discrete Fourier transform expansion is performed on the data to be transmitted to obtain an extended signal. In step S502, subcarrier mapping is performed on the extended signal. Then, in step S503, spectrum shaping is performed on the subcarrier using a spectrum shaping factor to obtain a shaped signal. According to an example disclosed, the spectrum shaping factor may include an amplitude shaping factor. In step S503, the amplitude factor may be used to perform spectrum shaping on the subcarrier to reduce the power of the subcarrier truncated due to non-orthogonal super-Nyquist modulation.

[0049] For example, in step S503, the amplitude shaping factor for each subcarrier may be determined according to the frequency domain value of the specific pulse function. For example, the subcarrier may be spectrally shaped by a root raised cosine function. In this case, the amplitude shaping factor for each subcarrier may be determined according to the frequency domain value of the root raised cosine function. Figure 3 This is described in detail in formulas (1)-(3), so it will not be repeated here.

[0050] The amplitude shaping factor for each subcarrier can be determined directly based on the frequency domain value of a specific pulse function. Alternatively, the amplitude shaping factor for each subcarrier can also be determined based on the frequency domain value of a DFT parameter of a specific pulse function. In addition, in step S503, the amplitude shaping factor can also be determined according to the number of subcarriers truncated in FTN modulation and the total number of subcarriers.

[0051] In addition, according to another example of the present disclosure, in step S503, the amplitude shaping factor of each subcarrier may be determined according to the power level of the subcarrier whose spectrum is truncated and the subcarrier whose spectrum is not truncated in the non-orthogonal super-Nyquist modulation. For example, the amplitude shaping factor may include a first amplitude shaping factor for the subcarrier whose spectrum is truncated in the FTN modulation and a second amplitude shaping factor for the subcarrier whose spectrum is not truncated in the FTN modulation. The first amplitude shaping factor may be smaller than the second amplitude shaping factor, thereby reducing the power of the subcarrier whose spectrum is truncated, and the power of the subcarrier whose spectrum is not truncated will occupy a larger proportion in the total transmission power, thereby improving the signal-to-noise ratio. The above has been combined with Figure 4A-4C This has been described in detail, so I will not repeat it here.

[0052] According to another example of the present disclosure, the spectrum shaping factor may also include a phase shaping factor. In step S503, the phase factor may also be used to perform spectrum shaping on the subcarrier to reduce the impact of non-orthogonal super-Nyquist modulation on the high peak-to-average power ratio. For example, the spectrum shaping factor may be a phase set An element in .

[0053] After obtaining the spectrum shaping signal, a non-orthogonal super-Nyquist signal may be determined according to the shaping signal in step S504. And in step S505, the non-orthogonal super-Nyquist signal may be sent according to the determined non-orthogonal super-Nyquist signal. Figure 1 As shown in the schematic diagram, spectrum shaping can be performed after subcarrier mapping, and the spectrum shaped signal is subjected to inverse fast Fourier transform (IFFT), an extended cyclic prefix is ​​inserted, and non-orthogonal super-Nyquist (FTN) modulation.

[0054] In the electronic device according to the present disclosure, by performing spectrum shaping on a signal to be transmitted, the power of the spectrum truncated portion can be suppressed, the SNR is improved, and the out-of-band leakage is reduced.

[0055] According to an embodiment of the present disclosure, it may be assumed that spectrum shaping is required for the signal to be sent, unless information indicating that spectrum shaping is not to be performed is received, and vice versa. For example, the method 500 may further include receiving shaping indication information indicating whether to perform spectrum shaping. In step S503, it may be determined whether to perform spectrum shaping on the subcarrier using the spectrum shaping factor to obtain a shaped signal according to the received shaping indication information. For example, whether to perform spectrum shaping may be indicated by high-layer signaling such as radio resource control (RRC) signaling or downlink control information (DCI).

[0056] According to an embodiment of the present disclosure, the spectrum shaping factor may be preset. Alternatively, information about the spectrum shaping factor may also be received, wherein the information about the spectrum shaping factor may indicate the spectrum shaping factor implicitly or explicitly.

[0057] For example, the method 500 may further include receiving a reference signal such as a channel reference signal, and in step S503, the spectrum shaping factor may be determined according to the reference signal. For another example, the receiving unit may receive the transfer function type information and the information about the time domain compression factor of the non-orthogonal super-Nyquist modulation. In step S503, the spectrum shaping factor may be determined according to the transfer function type information and the information about the time domain compression factor of the non-orthogonal super-Nyquist modulation. Specifically, in step S503, the subcarrier whose spectrum is truncated may be determined according to the time domain compression factor, and the spectrum shaping factor may be obtained according to the subcarrier whose spectrum is truncated.

[0058] In addition, the power allocation vectors for the subcarriers whose spectrum is truncated and the subcarriers whose spectrum is not truncated may be pre-set according to the time domain compression factor of the non-orthogonal super-Nyquist modulation, and a codebook corresponding to the power allocation vector may be stored. Thus, in step S503, the amplitude spectrum shaping factor may be determined based on the codebook of the power allocation vector according to the time domain compression factor received by the receiving unit.

[0059] In addition, in the case where the amplitude shaping factor of each subcarrier is determined according to the power level of the subcarrier whose spectrum is truncated and the subcarrier whose spectrum is not truncated in non-orthogonal super-Nyquist modulation, a power level table for the subcarrier whose spectrum is truncated and the subcarrier whose spectrum is not truncated can be pre-set according to the time domain compression factor of the non-orthogonal super-Nyquist modulation. For example, the number of subcarriers in each power level can be determined according to the proportion of different power levels in the area where the spectrum is truncated or not truncated. For another example, in the case where the time domain compression factor is a non-ideal time domain compression factor, the number of subcarriers in each power level can be pre-set. The receiving unit can receive information about the proportion of different power levels, so that in step S503, the amplitude spectrum shaping factor can be determined based on the pre-set power level table according to the proportion of different power levels.

[0060] In addition, the method 500 may further include receiving a higher layer signaling, such as RRC, to indicate the phase spectrum shaping factor.

[0061] <Hardware Structure>

[0062] In addition, the block diagram used in the description of the above-mentioned embodiment shows a block in a function unit. These function blocks (structural units) are implemented by any combination of hardware and / or software. In addition, the implementation means of each function block is not particularly limited. That is, each function block can be implemented by a device that is physically and / or logically combined, or two or more devices that are physically and / or logically separated can be directly and / or indirectly (for example, by wired and / or wireless) connected to be implemented by the above-mentioned multiple devices.

[0063] For example, an electronic device according to an embodiment of the present disclosure may function as a computer that executes the processing of the wireless communication method according to the present disclosure. Figure 6 6 is a schematic diagram of the hardware structure of the device 600 (base station or terminal) involved in the embodiment of the present disclosure. The above-mentioned device 600 (base station or terminal) can be physically constituted as a computer device including a processor 610, a memory 620, a storage 630, a communication device 640, an input device 650, an output device 660, a bus 670, etc.

[0064] In addition, in the following description, the word "device" may also be replaced by circuit, equipment, unit, etc. The hardware structure of the user terminal and the base station may include one or more of the devices shown in the figure, or may not include some of the devices.

[0065] For example, only one processor 610 is shown, but multiple processors may be used. In addition, processing may be performed by one processor, or by more than one processor simultaneously, sequentially, or by other methods. In addition, processor 610 may be implemented by more than one chip.

[0066] The various functions of the device 600 are implemented, for example, in the following manner: by reading the specified software (program) into hardware such as the processor 610 and the memory 620, so that the processor 610 performs calculations, controls the communication performed by the communication device 640, and controls the reading and / or writing of data in the memory 620 and the storage 630.

[0067] The processor 610 controls the entire computer by, for example, operating an operating system. The processor 610 may be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, a computing device, registers, etc. For example, the above-mentioned processing unit, etc. may be implemented by the processor 610.

[0068] In addition, the processor 610 reads the program (program code), software module, data, etc. from the storage 630 and / or the communication device 640 to the memory 620, and performs various processes according to them. As a program, a program that enables a computer to perform at least a part of the actions described in the above embodiments can be used. For example, the processing unit of the electronic device can be implemented by a control program stored in the memory 620 and operated by the processor 610, and other functional blocks can also be implemented in the same way.

[0069] The memory 620 is a computer-readable recording medium, and may be composed of at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically programmable read-only memory (EEPROM), a random access memory (RAM), or other appropriate storage media. The memory 620 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 620 may store an executable program (program code), a software module, etc., for implementing the method involved in one embodiment of the present disclosure.

[0070] The memory 630 is a computer-readable recording medium, and may be composed of at least one of a flexible disk, a floppy disk, a magneto-optical disk (e.g., a read-only disk (CD-ROM (Compact Disc ROM)), a digital versatile disk, a Blu-ray (registered trademark) disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key driver), a magnetic stripe, a database, a server, and other appropriate storage media. The memory 630 may also be referred to as an auxiliary storage device.

[0071] The communication device 640 is hardware (transmitting and receiving device) for communicating between computers via a wired and / or wireless network, and is also called a network device, a network controller, a network card, a communication module, etc. The communication device 640 may include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to realize, for example, frequency division duplex (FDD) and / or time division duplex (TDD). For example, the above-mentioned transmitting unit, receiving unit, etc. may be realized by the communication device 640.

[0072] The input device 650 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 660 is an output device that implements output to the outside (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.). In addition, the input device 650 and the output device 660 may also be an integrated structure (e.g., a touch panel).

[0073] In addition, the processor 610, the memory 620 and other devices are connected via a bus 670 for communicating information. The bus 670 may be composed of a single bus or different buses between devices.

[0074] In addition, the electronic device may include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA), and some or all of the functional blocks may be implemented by the hardware. For example, the processor 610 may be installed by at least one of these hardware.

[0075] (Variation Example)

[0076] In addition, the terms described in this specification and / or the terms required for understanding this specification can be interchanged with terms having the same or similar meanings. For example, a channel and / or a symbol can also be a signal (signaling). In addition, a signal can also be a message. A reference signal can also be referred to as RS (Reference Signal), and can also be referred to as a pilot (Pilot), a pilot signal, etc. depending on the applicable standard. In addition, a component carrier (CC) can also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0077] In addition, the information, parameters, etc. described in this specification may be expressed as absolute values, as relative values ​​to a specified value, or as other corresponding information. For example, a wireless resource may be indicated by a specified index. Furthermore, the formulas, etc. using these parameters may also be different from those explicitly disclosed in this specification.

[0078] The names used for parameters and the like in this specification are not limiting in any respect. For example, various channels (Physical Uplink Control Channel (PUCCH), Physical Downlink Control Channel (PDCCH), etc.) and information elements may be identified by any appropriate names, and therefore the various names assigned to these various channels and information elements are not limiting in any respect.

[0079] The information, signals, etc. described in this specification may be represented by any of a variety of different technologies. For example, data, commands, instructions, information, signals, bits, symbols, chips, etc. that may be mentioned in the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0080] In addition, information, signals, etc. can be output from an upper layer to a lower layer, and / or from a lower layer to an upper layer. Information, signals, etc. can be input or output via multiple network nodes.

[0081] Input or output information, signals, etc. can be stored in a specific place (such as memory), or managed through a management table. Input or output information, signals, etc. can be overwritten, updated, or supplemented. Output information, signals, etc. can be deleted. Input information, signals, etc. can be sent to other devices.

[0082] The notification of information is not limited to the methods / implementations described in this specification, and may also be performed by other methods. For example, the notification of information may be implemented by physical layer signaling (e.g., downlink control information (DCI), uplink control information (UCI)), upper layer signaling (e.g., radio resource control (RRC) signaling, broadcast information (master information block (MIB), system information block (SIB), etc.), media access control (MAC) signaling), other signals or a combination thereof.

[0083] In addition, physical layer signaling may also be referred to as L1 / L2 (Layer 1 / Layer 2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. In addition, RRC signaling may also be referred to as RRC message, such as RRC Connection Setup message, RRC Connection Reconfiguration message, etc. In addition, MAC signaling may be notified, for example, through a MAC control unit (MAC CE (Control Element)).

[0084] Furthermore, notification of prescribed information (eg, notification of "is X") is not limited to being performed explicitly, and may also be performed implicitly (eg, by not notifying the prescribed information, or by notifying other information).

[0085] The judgment can be made by a value represented by 1 bit (0 or 1), by a true or false value (Boolean value) represented by true (true) or false (false), or by comparing numerical values ​​(for example, comparing with a specified value).

[0086] Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by other names, shall be interpreted broadly to refer to commands, sets of commands, codes, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, execution threads, steps, functions, etc.

[0087] In addition, software, commands, information, etc. can be sent or received via a transmission medium. For example, when software is sent from a website, server, or other remote resource using wired technology (coaxial cable, optical cable, twisted pair, digital subscriber line (DSL, Digital Subscriber Line), etc.) and / or wireless technology (infrared, microwave, etc.), these wired technology and / or wireless technology are included in the definition of transmission medium.

[0088] The terms "system" and "network" used in this specification are used interchangeably.

[0089] In this specification, the terms "base station (BS)", "wireless base station", "eNB", "gNB", "cell", "sector", "cell group", "carrier" and "component carrier" can be used interchangeably. Base stations are sometimes also referred to as fixed stations, NodeB, eNodeB (eNB), access points, transmission points, reception points, micro-micro cells, small cells, etc.

[0090] A base station can accommodate one or more (e.g., three) cells (also called sectors). When a base station accommodates multiple cells, the entire coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services through a base station subsystem (e.g., a small base station for indoor use (RRH, Remote Radio Head)). Terms such as "cell" or "sector" refer to a part or the entire coverage area of ​​a base station and / or a base station subsystem that provides communication services in the coverage.

[0091] In this specification, the terms "mobile station (MS)", "user terminal", "user equipment (UE)" and "terminal" can be used interchangeably. Mobile station is sometimes also referred to by those skilled in the art as user station, mobile unit, user unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile user station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client or several other appropriate terms.

[0092] In addition, the wireless base station in this specification can also be replaced by a user terminal. For example, for a structure in which the communication between a wireless base station and a user terminal is replaced by the communication between multiple user terminals (D2D, Device-to-Device), the various methods / implementations of the present disclosure can also be applied. In this case, the functions of the above-mentioned electronic devices can be regarded as the functions of the user terminal. In addition, words such as "uplink" and "downlink" can also be replaced by "side". For example, the uplink channel can also be replaced by the side channel.

[0093] Likewise, the user terminal in this specification may also be replaced by a wireless base station. In this case, the functions of the user terminal may be regarded as the functions of the first communication device or the second communication device.

[0094] In this specification, a specific action performed by a base station is sometimes performed by its upper node according to the situation. Obviously, in a network composed of one or more network nodes having a base station, various actions performed for communication with a terminal can be performed by a base station, one or more network nodes other than the base station (for example, a mobile management entity (MME), a serving gateway (S-GW), etc., but not limited to this), or a combination thereof.

[0095] The various methods / implementations described in this specification may be used alone or in combination, and may be switched during execution. In addition, the processing steps, sequences, flow charts, etc. of the various methods / implementations described in this specification may be changed in order as long as there is no contradiction. For example, with respect to the methods described in this specification, various step units are given in an exemplary order, and are not limited to the specific order given.

[0096] The various modes and embodiments described in this specification can be applied to long term evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), super 3G, IMT-Advanced, 4G, 5G, future radio access (FRA), new radio access technology (New-RAT), new radio (NR), new radio access (NX), future generation radio access (FX), global system for mobile communications (GSM (registered trademark), code division multiple access 3000 (CDMA 3000), ultra mobile broadband (UMB), IEEE 920.11 (Wi-Fi (registered trademark)), IEEE 920.16 (WiMAX (registered trademark)), IEEE920.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems of other appropriate wireless communication methods, and / or next-generation systems expanded based on them.

[0097] The phrase "based on" used in this specification does not mean "only based on" unless otherwise specified in other paragraphs. In other words, the phrase "based on" means both "only based on" and "at least based on".

[0098] Any reference to a unit using the names "first", "second", etc. used in this specification does not fully limit the number or order of these units. These names may be used in this specification as a convenient method to distinguish between two or more units. Therefore, a reference to a first unit and a second unit does not mean that only two units can be used or that the first unit must precede the second unit in some form.

[0099] The term "determining" used in this specification sometimes includes a variety of actions. For example, with respect to "determining", calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database, or other data structure), ascertaining, etc. can be regarded as performing "determining". In addition, with respect to "determining", receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, accessing (e.g., accessing data in a memory), etc. can also be regarded as performing "determining". In addition, with respect to "determining", resolving, selecting, choosing, establishing, comparing, etc. can also be regarded as performing "determining". That is, with respect to "determining", several actions can be regarded as performing "determining".

[0100] The terms "connected", "coupled" or any variation thereof used in this specification refer to any direct or indirect connection or combination between two or more units, and may include the following situations: there are one or more intermediate units between two units that are "connected" or "coupled" to each other. The combination or connection between units can be physical, logical, or a combination of the two. For example, "connect" can also be replaced by "access". When used in this specification, two units can be considered to be "connected" or "coupled" to each other by using one or more wires, cables, and / or printed electrical connections, and as several non-limiting and non-exhaustive examples, by using electromagnetic energy with wavelengths in the radio frequency region, microwave region, and / or light (both visible and invisible light) region, etc.

[0101] When the terms "including", "comprising", and their variations are used in this specification or claims, these terms are open ended like the term "having". Furthermore, the term "or" used in this specification or claims is not an exclusive or.

[0102] The present disclosure is described in detail above, but it is obvious to those skilled in the art that the present disclosure is not limited to the embodiments described in this specification. The present disclosure can be implemented as a modification and alteration without departing from the purpose and scope of the present disclosure as determined by the claims. Therefore, the description in this specification is for the purpose of illustration and does not have any restrictive meaning for the present disclosure.

Claims

1. An electronic device, comprising: a processing unit configured to perform discrete Fourier transform expansion on data to be transmitted to obtain an extended signal, perform subcarrier mapping on the extended signal, perform spectrum shaping on the subcarrier using a spectrum shaping factor to obtain a shaped signal, and obtain a non-orthogonal super-Nyquist signal using non-orthogonal super-Nyquist modulation according to the shaped signal; as well as a transmitting unit configured to transmit the non-orthogonal super-Nyquist signal, Wherein, the spectrum shaping factor includes an amplitude shaping factor, The processing unit performs spectrum shaping on the subcarriers using amplitude shaping factors to reduce the power of the subcarriers that are truncated due to the non-orthogonal super-Nyquist modulation.

2. The electronic device according to claim 1, wherein The amplitude shaping factor for each subcarrier is determined according to the frequency domain value of a specific pulse function.

3. The electronic device according to claim 1, wherein The amplitude shaping factor of each subcarrier is determined according to the power levels of the subcarriers whose spectrum is truncated and the subcarriers whose spectrum is not truncated in the non-orthogonal super-Nyquist modulation.

4. The electronic device according to claim 1, wherein The spectrum shaping factor also includes a phase shaping factor, The processing unit also performs spectral shaping of the subcarriers using phase shaping factors to reduce the impact of non-orthogonal super-Nyquist modulation on high peak-to-average power ratios.

5. The electronic device according to any one of claims 1 to 4, further comprising: a receiving unit configured to receive shaping indication information indicating whether to perform spectrum shaping, The processing unit determines whether to use the spectrum shaping factor to perform spectrum shaping on the subcarrier to obtain a shaped signal according to the received shaping indication information.

6. The electronic device according to any one of claims 1 to 4, further comprising: a receiving unit configured to receive a reference signal, The processing unit further determines the spectrum shaping factor according to the reference signal.

7. The electronic device according to any one of claims 1 to 4, further comprising: a receiving unit configured to receive the transfer function type information and the information about the time domain compression factor of the non-orthogonal super-Nyquist modulation, The processing unit further determines the spectrum shaping factor according to the transfer function type information and information about a time domain compression factor of non-orthogonal super-Nyquist modulation.

8. A spectrum shaping method for a non-orthogonal waveform, comprising: Performing discrete Fourier transform expansion on the data to be transmitted to obtain an expanded signal; Performing subcarrier mapping on the extended signal; Performing spectrum shaping on the subcarrier using a spectrum shaping factor to obtain a shaped signal; Obtaining a non-orthogonal super-Nyquist signal using non-orthogonal super-Nyquist modulation according to the shaped signal; as well as sending the non-orthogonal super-Nyquist signal, Wherein, the spectrum shaping factor includes an amplitude shaping factor, The using the spectrum shaping factor to perform spectrum shaping on the subcarrier to obtain a shaped signal comprises: The subcarriers are spectrally shaped using amplitude shaping factors to reduce the power of subcarriers that are truncated due to non-orthogonal super-Nyquist modulation.

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