CN114024816B - 5G new waveform method based on orthogonal multi-wavelet packet - Google Patents
5G new waveform method based on orthogonal multi-wavelet packet Download PDFInfo
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Abstract
The application discloses a 5G new waveform method based on an orthogonal multi-wavelet packet, which comprises the following steps: generating primary expansion data by performing serial-parallel conversion on the first transmission data; performing secondary serial-parallel conversion on each expansion data in the N expansion data to generate secondary expansion data; the multiplexing expansion data is obtained by carrying out time shifting multiplexing processing on the secondary expansion data; according to the first calling instruction, N basic functions are called; respectively inputting the N basic functions into the secondary expansion data for modulation to generate N modulation waveforms; fitting and reconstructing the N modulation waveforms to generate a first reconstruction waveform; and outputting the first reconstruction waveform through a digital-to-analog conversion unit. The method solves the technical problems that the OFDM signal has high peak value average power ratio in the time domain, the power band outside the attenuation deceleration is insufficient, and the bandwidth of the sub-channel cannot be distributed unevenly in the prior art.
Description
Technical Field
The application relates to the field of mobile communication, in particular to a 5G new waveform method based on an orthogonal multi-wavelet packet.
Background
The physical layer of the 4G and 5G mobile communication adopts an orthogonal frequency division multiplexing technology (Orthogonal Frequency Division Multiplexing, OFDM for short) based on a Fourier base, and the orthogonal frequency division multiplexing technology mainly divides a channel into a plurality of orthogonal sub-channels, converts a high-speed data signal into parallel low-speed sub-data streams, and modulates the parallel low-speed sub-data streams on each sub-channel for transmission. Since the spectrums of the subcarriers overlap each other, higher spectrum efficiency can be obtained. The orthogonal signals may be separated by employing correlation techniques at the receiving end, which may reduce mutual interference between the sub-channels. Since the signal bandwidth on each subchannel is less than the coherence bandwidth of the channel, each subchannel can be seen as flat fading, so that inter-symbol interference can be eliminated, and since the bandwidth of each subchannel is only a small fraction of the original channel bandwidth, channel equalization becomes relatively easy. At present, the OFDM is realized by adopting fast fourier transform (Fast Fourier Transform, FFT for short) and inverse fast fourier transform (INVERT FAST Fourier Transformation, IFFT for short) when being realized.
In the process of realizing the technical scheme in the embodiment of the application, the inventor discovers that the above technology at least has the following technical problems:
In the prior art, the technical problems that the OFDM signal has high peak value average power ratio in the time domain, the power band outside the attenuation speed is insufficient, and the sub-channel bandwidth cannot be distributed unevenly exist.
Disclosure of Invention
The application aims to provide a 5G new waveform method based on an orthogonal multi-wavelet packet, which solves the technical problems that in the prior art, an OFDM signal has high peak value average power ratio in the time domain, the power band outside attenuation deceleration is insufficient, and the sub-channel bandwidth cannot be distributed unevenly. Besides the traditional frequency division multiplexing in the frequency domain through the multi-wavelet base, the orthogonal multiplexing is realized by utilizing the integer time shift characteristic of the multi-wavelet base in the time domain, the peak-to-average ratio, the side lobe power and the calculation complexity of the system are effectively reduced while fewer subcarriers are transmitted and the current 5G NR data rate is approximate, the frequency band utilization rate is improved, and the capacity of unevenly dividing the frequency band is realized so as to meet the technical effect of differentiation requirements.
In view of the above, embodiments of the present application provide a 5G new waveform method based on an orthogonal multi-wavelet packet.
In a first aspect, the present application provides a method for 5G new waveforms based on orthogonal multi-wavelet packets, wherein the method comprises: obtaining first transmission data; generating primary expansion data by performing serial-parallel conversion on the first transmission data, wherein the primary expansion data comprises N expansion data; performing secondary serial-parallel conversion on each of the N extension data to generate secondary extension data, wherein each of the primary extension data and each of the secondary extension data are in a mapping relation of 1 to M; the multiplexing expansion data is obtained by carrying out time shifting multiplexing processing on the secondary expansion data; according to the first calling instruction, N basic functions are called; respectively inputting the N basic functions into the secondary expansion data for modulation to generate N modulation waveforms; fitting and reconstructing the N modulation waveforms to generate a first reconstruction waveform; and outputting the first reconstruction waveform through a digital-to-analog conversion unit.
In another aspect, the present application further provides a 5G new waveform method based on an orthogonal multi-wavelet packet, where the system includes: a first obtaining unit: the first obtaining unit is used for obtaining first sending data; a first expansion unit: the first expansion unit is used for generating primary expansion data by carrying out serial-parallel conversion on the first transmission data, wherein the primary expansion data comprises N expansion data; a second expansion unit: the second expansion unit is used for performing secondary serial-parallel conversion on each expansion data in the N expansion data to generate secondary expansion data, wherein each expansion data in the primary expansion data and each expansion data in the secondary expansion data are in a mapping relation of 1 to M; a second obtaining unit: the second obtaining unit is used for obtaining multiplexing expansion data by performing time shifting multiplexing processing on the secondary expansion data; a first calling unit: the first calling unit is used for calling N basic functions according to a first calling instruction; a first modulation unit: the first modulating unit is used for respectively inputting the N basic functions into the secondary expansion data to modulate, and generating N modulating waveforms; a first generation unit: the first generation unit is used for respectively inputting the N basis functions into the secondary expansion data for modulation to generate N modulation waveforms; a first output unit: the first output unit is used for outputting the first reconstruction waveform through the digital-to-analog conversion unit.
In a third aspect, an embodiment of the present application further provides a 5G new waveform system based on an orthogonal multi-wavelet packet, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor implements the steps of the method described in the first aspect when executing the program.
One or more technical solutions provided in the embodiments of the present application at least have the following technical effects or advantages:
The method comprises the steps of obtaining first transmission data, further carrying out serial-parallel conversion on the first transmission data, expanding the time domain of the data to obtain primary expansion data, wherein the primary expansion data comprises N expansion data, further carrying out secondary serial-parallel conversion on each expansion data in the N expansion data to generate secondary expansion data, each expansion data in the primary expansion data and each expansion data in the secondary expansion data form a mapping relation of 1 to M, further carrying out time-shift multiplexing on the second expansion data to obtain multiplexed expansion data with orthogonal multiplexing after dislocation, modulating the input secondary expansion data by calling N basis functions, and further carrying out addition fitting on all the modulated waveforms to generate a first reconstruction waveform, so that the orthogonal multiplexing is realized by utilizing the integral time-shift characteristic of the multi-wavelet basis outside the traditional frequency-division multiplexing through the multi-wavelet basis, the system peak ratio is effectively reduced, the complexity and the uniform frequency band can be satisfied while the system peak ratio is effectively reduced, the power is improved, and the bandwidth demand is not satisfied.
The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, it being obvious that the drawings in the description below are only exemplary and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for generating a 5G new waveform based on an orthogonal multi-wavelet packet according to an embodiment of the present application;
fig. 2 is a schematic flow chart of obtaining multiplexing expansion data in a 5G new waveform method based on an orthogonal multi-wavelet packet according to an embodiment of the present application;
FIG. 3 is a schematic flow chart of a constraint of basic function call in a 5G new waveform method based on an orthogonal multi-wavelet packet according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a 5G new waveform method based on an orthogonal multi-wavelet packet according to an embodiment of the present application;
Fig. 5 is a schematic structural diagram of an exemplary electronic device according to an embodiment of the present application.
Reference numerals illustrate:
The device comprises a first obtaining unit 11, a first expanding unit 12, a second expanding unit 13, a second obtaining unit 14, a first calling unit 15, a first modulating unit 16, a first generating unit 17, a first output unit 18, a bus 300, a receiver 301, a processor 302, a transmitter 303, a memory 304 and a bus interface 305.
Detailed Description
The embodiment of the application solves the technical problems that the OFDM signal has high peak average power ratio in the time domain, the power band outside attenuation deceleration is insufficient and the sub-channel bandwidth cannot be distributed unevenly in the prior art by providing the 5G new waveform method based on the orthogonal multi-wavelet packet. Besides the traditional frequency division multiplexing in the frequency domain through the multi-wavelet base, the orthogonal multiplexing is realized by utilizing the integer time shift characteristic of the multi-wavelet base in the time domain, the peak-to-average ratio, the side lobe power and the calculation complexity of the system are effectively reduced while fewer subcarriers are transmitted and the current 5G NR data rate is approximate, the frequency band utilization rate is improved, and the capacity of unevenly dividing the frequency band is realized so as to meet the technical effect of differentiation requirements.
In the following, the technical solutions of the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments of the present application, and the present application is not limited by the exemplary embodiments described herein. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application. It should be further noted that, for convenience of description, only some, but not all of the drawings related to the present application are shown.
Summary of the application
The physical layer of the 4G and 5G mobile communication adopts an orthogonal frequency division multiplexing technology (Orthogonal Frequency Division Multiplexing, OFDM for short) based on a Fourier base, and the orthogonal frequency division multiplexing technology mainly divides a channel into a plurality of orthogonal sub-channels, converts a high-speed data signal into parallel low-speed sub-data streams, and modulates the parallel low-speed sub-data streams on each sub-channel for transmission. Since the spectrums of the subcarriers overlap each other, higher spectrum efficiency can be obtained. The orthogonal signals may be separated by employing correlation techniques at the receiving end, which may reduce mutual interference between the sub-channels. Since the signal bandwidth on each subchannel is less than the coherence bandwidth of the channel, each subchannel can be seen as flat fading, so that inter-symbol interference can be eliminated, and since the bandwidth of each subchannel is only a small fraction of the original channel bandwidth, channel equalization becomes relatively easy. At present, the OFDM is realized by adopting fast fourier transform (Fast Fourier Transform, FFT for short) and inverse fast fourier transform (INVERT FAST Fourier Transformation, IFFT for short) when being realized. However, in the prior art, the OFDM signal has a high peak-to-average power ratio in the time domain, and the power band outside the attenuation is insufficient, and the sub-channel bandwidth cannot be unevenly distributed.
Aiming at the technical problems, the technical scheme provided by the application has the following overall thought:
The application provides a 5G new waveform method based on an orthogonal multi-wavelet packet, wherein the method comprises the following steps: obtaining first transmission data; generating primary expansion data by performing serial-parallel conversion on the first transmission data, wherein the primary expansion data comprises N expansion data; performing secondary serial-parallel conversion on each of the N extension data to generate secondary extension data, wherein each of the primary extension data and each of the secondary extension data are in a mapping relation of 1 to M; the multiplexing expansion data is obtained by carrying out time shifting multiplexing processing on the secondary expansion data; according to the first calling instruction, N basic functions are called; respectively inputting the N basic functions into the secondary expansion data for modulation to generate N modulation waveforms; fitting and reconstructing the N modulation waveforms to generate a first reconstruction waveform; and outputting the first reconstruction waveform through a digital-to-analog conversion unit.
Having described the basic principles of the present application, various non-limiting embodiments of the present application will now be described in detail with reference to the accompanying drawings.
Example 1
Referring to fig. 1, an embodiment of the present application provides a 5G new waveform method based on an orthogonal multi-wavelet packet, which specifically includes the following steps:
step S100: obtaining first transmission data;
step S200: generating primary expansion data by performing serial-parallel conversion on the first transmission data, wherein the primary expansion data comprises N expansion data;
Specifically, the first transmission data is used as basic original data, and the frame structure is redesigned according to the first transmission data. Because serial-parallel conversion is a technology for completing conversion between serial transmission and parallel transmission, that is, a process of converting a continuous signal element sequence into a group of corresponding parallel signal elements representing the same information, for example, dividing an information stream (if 8bits exist) into two paths of signals, and transmitting the two paths of signals simultaneously, wherein the time is half of the original time, the first sending data is input into a serial-parallel conversion unit for serial-parallel conversion, so as to obtain primary expansion data, wherein the primary expansion data is data which is time-shifted and expanded after the primary serial-parallel conversion, and comprises N expansion data, N is a positive integer, preferably, in the specific implementation process, when N is equal to 4, higher orthogonal multiplexing can be exerted, and a lower peak-to-average ratio is kept, so that primary expansion of the data is realized, and a basic data source can be provided for the next decomposition and reconstruction step based on the primary serial-parallel conversion.
Step S300: performing secondary serial-parallel conversion on each of the N extension data to generate secondary extension data, wherein each of the primary extension data and each of the secondary extension data are in a mapping relation of 1 to M;
step S400: the multiplexing expansion data is obtained by carrying out time shifting multiplexing processing on the secondary expansion data;
Specifically, the N extension data are the primary extension data, M is a base function support length, and M is a positive integer, and the secondary extension data are obtained by performing secondary serial-to-parallel conversion on the N extension data. For example, when the positive integer N is taken to be 4, the N extension data of the primary extension data includes first extension data, second extension data, third extension data, and preferably, the N extension data is subjected to secondary serial-to-parallel conversion based on m=3, that is, the first extension data corresponds to 3 extension data, the second extension data corresponds to 3 extension data, and so on. Thus, the primary expansion data is subjected to secondary serial-parallel conversion to realize further time domain expansion and further decomposition of the data.
And further performing dislocation processing on the secondary expansion data, namely realizing time shift multiplexing based on the orthogonal frequency domain characteristic in order to keep dislocation orthogonality of the expansion data. In detail, by extracting M pieces of extension data corresponding to the first extension data, the M pieces of extension data are overlapped and misplaced, and the misplaced values are the same, so that the misplaced orthogonality of the secondary extension data can be ensured, the time-frequency domain multiplexing is realized, and the technical effect of reducing the computational complexity is achieved.
Step S500: according to the first calling instruction, N basic functions are called;
Step S600: respectively inputting the N basic functions into the secondary expansion data for modulation to generate N modulation waveforms;
In particular, the channel is formed by a vector envelope function and time shift expansion thereof, the time domain support length of which directly determines the sub-channel bandwidth, and when the function is used for modulation, the data rate is determined, and the data can directly form a waveform diagram, including a time-frequency diagram, wherein the dynamic signal x (t) is a function describing the values of the signal at different moments. The independent variable of the frequency domain (frequency domain) is frequency, that is, the horizontal axis is frequency, and the vertical axis is the amplitude of the frequency signal, that is, the spectrum diagram, because the channel is formed by vector envelope function and time shift extension thereof, the time domain support length directly determines the bandwidth of the sub-channel, when the function is used for modulation, the data rate is determined, and the reconstructed first output waveform structure has a certain overlapping property, that is, the channel has overlapping in the frequency domain but still maintains orthogonality.
Further, the frequency band division based on the multi-wavelet packet makes the space stretched by the integer time shift of Φ (2 -n t) be V n, the space stretched by the integer time shift of ψ (2 -n t) be W n, and the frequency band of V n (or W n) is divided into r orthogonal subbands by Φ (2 -n t) (or ψ (2 -n t)). In the channel halving condition, the space V n is divided into subspaces V n+1 and W n+1, each subspace having half the frequency band of V n (in practice, there is a certain overlap of the frequency bands of V n+1 and W n+1) and having r subbands, such that the frequency band of the space V n is divided into 2r subbands through one decomposition. Likewise, the same is true for W n. For example, if the number of decomposition layers of the multi-wavelet packet is L, the original space may be divided into 2L subspaces, the frequency band thereof may be divided into m=r· L orthogonal subbands, and due to the orthogonality of Φ i(t)＝[φi1(t),···,φir(t)]T and ψ i(t)＝[ψi1(t),···,ψir(t)]T(1≤i≤2L) in the time domain and the frequency domain, these functions may be used as modulation waveforms in communication, and orthogonal multiplexing may be achieved in the time domain and the frequency domain at the same time. Therefore, the multi-wavelet packet basis function replaces the fast Fourier transform in OFDM, so that the technical effect of reducing the negative influence of peak-to-average ratio by using fewer sub-carrier transmission and the data rate close to the existing 5G NR is achieved.
Step S700: fitting and reconstructing the N modulation waveforms to generate a first reconstruction waveform;
step S800: and outputting the first reconstruction waveform through a digital-to-analog conversion unit.
Specifically, the first reconstructed waveform is obtained by fitting and reconstructing the N modulated waveforms, the first reconstructed waveform is output through a digital-to-analog conversion unit, the waveform output by the conversion unit enters the next input end, and the input end is output and demodulated through a matched filter, because the first reconstructed waveform is a 5G NR frame structure based on a multi-wavelet packet orthogonal frequency division multiplexing technology, orthogonal multiplexing is realized in a time domain by utilizing the integer time shift characteristic of a multi-wavelet basis, the integer time shift orthogonality is also satisfied in the time domain outside the frequency domain, the mathematical characteristic can be fully utilized, each subcarrier function can be reused through the integer orthogonal time shift characteristic to achieve the data rate close to the existing 5G NR with fewer subcarrier transmission, and the peak-to-average ratio problem caused by more carrier numbers of the existing 5G NR factors is relieved.
Further, as shown in fig. 2, the step S400 of the embodiment of the present application further includes:
step S410: obtaining first extension data of the primary extension data;
Step S420: obtaining M mapping extension data corresponding to the first extension data;
Step S430: sequentially performing equal dislocation processing on the M mapping expansion data to generate first multiplexing expansion data;
Step S440: and based on the first multiplexing expansion data, carrying out sequential orthogonal multiplexing processing on N expansion data in the primary expansion data to obtain the multiplexing expansion data.
Further, the generating the first multiplexed extension data by sequentially performing equal-offset processing on the M mapping extension data, where a delay time-frequency value of the equal-offset processing in the step S430 is
Further, the first extension data in the primary extension data is obtained, wherein the first extension data is one of the N extension data, then M mapping extension data corresponding to the first extension data is obtained, wherein the M mapping extension data is secondary extension data, and then M mapping extension data are sequentially subjected to equal dislocation processing, preferably, when m=3, the first extension data comprises 3 mapping extension data, namely, first mapping extension data, second mapping extension data and third mapping extension data, the second mapping extension data is dislocated backwards by a preset hysteresis value on the basis of the first mapping extension data, and so on, and the third mapping extension data is dislocated backwards by the preset hysteresis value on the basis of the second mapping extension data. In order to ensure the dislocation orthogonality, the preset hysteresis value is further limited, namely when the primary expansion data is N, the corresponding mapping expansion data of the secondary expansion is N×M, and further, the preset hysteresis value is that
Further, the equal dislocation processing is implemented according to integer time shift orthogonality properties of the multiple wavelets, the integer time shift orthogonality properties being expressed by a first constraint:
Wn(t-m),Wn(t-k)≥δ(k-m)Ir×r
Wherein n is greater than or equal to 0, and m, k epsilon Z.
Based on the first constraint condition, the method of performing dislocation processing on the secondary expansion data and generating multiplexing expansion data realizes orthogonal multiplexing by utilizing integer time shifting characteristics of the multi-wavelet base in the time domain besides realizing traditional frequency division multiplexing by the multi-wavelet base in the frequency domain, improves dislocation orthogonality, MWPT-OFDM reduces subcarriers by integer time shifting multiplexing of the time domain, and compared with the traditional FFT-OFDM-based 5G NR transmission, the method has the technical effects that the number of subcarriers used by a system is only 1/M times that of the FFT-OFDM, and the number of factor carriers is reduced to reduce the peak-to-average ratio of the system.
Further, as shown in fig. 3, after the first new waveform diagram is generated according to the first output waveform structure, step S500 of the embodiment of the present application further includes:
step S510: obtaining the number of 5G subcarriers;
step S520: obtaining a first orthogonal multiplexing subcarrier number according to the subcarrier number of 5G, wherein the first orthogonal subcarrier number is a subcarrier number obtained by dividing the subcarrier number of 5G by M;
Step S530: and carrying out calling quantity constraint on the N base functions according to the first orthogonal multiplexing subcarrier quantity.
Specifically, wherein the time slots are numbered and divided into a set of subframes of duration 1ms because the 5G waveform is based on the frame structure of TDD. Wherein TDD (Time Division Duplexing) is one of full duplex communication technologies used in a mobile communication system, and corresponds to FDD, which is a technology for timely distinguishing radio channels in downlink operation of a frame period and continuing uplink operation, and 101 ms subframes form a complete NR frame. The number of time slots in each frame is kept unchanged, each time slot is provided with 14 signal codes, each signal code is formed by overlapping 12 Fourier base orthogonal subcarriers, therefore, the number of output subcarriers, namely the number of first orthogonal multiplexing subcarriers, is obtained by obtaining the number of 5G subcarriers and calculating the number of 5G subcarriers and the M value, wherein the number of first orthogonal multiplexing subcarriers is the number of multi-wavelet orthogonal frequency division multiplexing subcarriers, and the number of calling base functions is limited. The negative effect caused by the excessively high peak-to-average ratio of the system is effectively reduced while the system is transmitted by fewer subcarriers and approaches to the current 5G NR data rate.
Further, the transmission signal based on the frequency domain orthogonal multiplexing is expressed by a first calculation formula, wherein the first calculation formula is as follows:
Wherein the number of subcarriers n=r.2 2 L,pk (t) is a multi-wavelet sub-function, where r is the number of multi-wavelet weights and L is the number of multi-wavelet packet decomposition layers.
Further, based on the frequency domain orthogonal multiplexing basis and the first constraint condition, expressing the multi-wavelet packet orthogonal frequency division multiplexing through a second calculation formula, wherein the second calculation formula is as follows:
Wherein, the number of subcarriers n=r.2 2 L, r is the multiple wavelet weight, L is the multiple wavelet packet decomposition layer number, and M is the multiple wavelet time domain support length.
Specifically, the multi-wavelet CL3 and Shan Xiaobo dB2 autocorrelation functions in the first calculation formula have the capability of zero crossing of an integer point, while the fourier-based sine function does not have the feature, and can be applied to time domain multiplexing in the integer orthogonal time shift characteristic. In general, for an OFDM system with N subcarriers, the peak power of the transmitted signal can be up to N times the average power, and for MWPT-OFDM, if the base function support length is an integer M, the number of subcarriers can be reduced toTherefore, based on the orthogonal multi-wavelet packet transformation to replace the fast Fourier transformation in the traditional FFT-OFDM, the proposed multi-wavelet packet orthogonal frequency division multiplexing technology can achieve the technical effects of effectively reducing the peak-to-average ratio, side lobe power and computational complexity of the system while transmitting with fewer subcarriers and approaching the current 5G NR data rate.
Furthermore, based on the first constraint condition, the multi-wavelet packet orthogonal frequency division multiplexing (MWPT-OFDM) symbol after the time domain integer orthogonal time shift multiplexing scheme can be expressed by the second calculation formula, so that the transmission of different numbers of subcarriers is realized, the data rate close to the existing 5G NR is achieved by using fewer subcarriers, and the technical effect of high peak-to-average ratio generated by more carriers of the existing 5G NR factor is relieved. The time domain multiplexing process is illustrated with the CL3 multi-wavelet packet supporting m=3 and the dB2 Shan Xiaobo packet: the CL3 multi-wavelet packet and the dB2 Shan Xiaobo packet have the same supporting length m=3 in the time domain except the orthogonality in the frequency domain, and all meet the integer time shift orthogonality according to the first constraint condition, so that the mathematical characteristic can be fully utilized, each subcarrier function can be reused through the integer time shift orthogonality, so that more signal codes can be transmitted by 4 carrier functions, and the effect of reducing the peak-to-average ratio based on the reduction of the number of subcarriers is achieved.
In summary, the 5G new waveform method based on the orthogonal multi-wavelet packet provided by the embodiment of the application has the following technical effects:
1. The method comprises the steps of obtaining first transmission data, further carrying out serial-parallel conversion on the first transmission data, expanding the time domain of the data to obtain primary expansion data, wherein the primary expansion data comprises N expansion data, further carrying out secondary serial-parallel conversion on each expansion data in the N expansion data to generate secondary expansion data, each expansion data in the primary expansion data and each expansion data in the secondary expansion data form a mapping relation of 1 to M, further carrying out time-shift multiplexing on the second expansion data to obtain multiplexed expansion data with orthogonal multiplexing after dislocation, modulating the input secondary expansion data by calling N basis functions, and further carrying out addition fitting on all the modulated waveforms to generate a first reconstruction waveform, so that the orthogonal multiplexing is realized by utilizing the integral time-shift characteristic of the multi-wavelet basis outside the traditional frequency-division multiplexing through the multi-wavelet basis, the system peak ratio is effectively reduced, the complexity and the uniform frequency band can be satisfied while the system peak ratio is effectively reduced, the power is improved, and the bandwidth demand is not satisfied.
2. Because the orthogonal multi-wavelet base is adopted to replace the orthogonal Fourier base in the 5G NR, and the integral time shift characteristic of the orthogonal multi-wavelet base is combined to redesign the 5G NR frame structure, the same data rate is transmitted by fewer subcarriers, the peak-to-average ratio, side lobe power and calculation complexity of the system are effectively reduced, the frequency band utilization rate is further improved, the capacity of unevenly dividing the frequency band is provided, and the technical effect of differentiated service requirements is met.
Example two
Based on the same inventive concept as the 5G new waveform method based on the orthogonal multi-wavelet packet in the previous embodiment, the present invention further provides a 5G new waveform system based on the orthogonal multi-wavelet packet, please refer to fig. 4, the system includes:
the first obtaining unit 11: the first obtaining unit 11 is configured to obtain first transmission data;
the first expansion unit 12: the first spreading unit 12 is configured to generate primary spreading data by performing serial-to-parallel conversion on the first transmission data, where the primary spreading data includes N spreading data;
The second expansion unit 13: the second expansion unit 13 is configured to perform secondary serial-parallel conversion on each expansion data in the N expansion data, and generate secondary expansion data, where each expansion data in the primary expansion data and each expansion data in the secondary expansion data have a mapping relationship of 1 to M;
the second obtaining unit 14: the second obtaining unit 14 is configured to obtain multiplexed extension data by performing time-shift multiplexing on the secondary extension data;
the first calling unit 15: the first calling unit 15 is configured to call N base functions according to a first calling instruction;
the first modulation unit 16: the first modulating unit 16 is configured to input the N basis functions into the second spread data for modulation, and generate N modulated waveforms;
the first generation unit 17: the first generating unit 17 is configured to input the N basis functions into the secondary spread data respectively to modulate the secondary spread data, and generate N modulated waveforms;
The first output unit 18: the first output unit 18 is configured to output the first reconstructed waveform through a digital-to-analog conversion unit.
Further, the system further comprises:
a third obtaining unit configured to obtain first extension data of the primary extension data;
a fourth obtaining unit, configured to obtain M mapping extension data corresponding to the first extension data;
the second generation unit is used for generating first multiplexing expansion data by sequentially performing equal dislocation processing on the M mapping expansion data;
And a fifth obtaining unit, configured to perform sequential orthogonal multiplexing processing on N pieces of extension data in the primary extension data based on the first multiplexed extension data, to obtain the multiplexed extension data.
Further, the system further comprises:
A sixth obtaining unit configured to obtain a number of 5G subcarriers;
A seventh obtaining unit configured to obtain a first orthogonal multiplexing subcarrier number according to the subcarrier number of 5G, where the first orthogonal subcarrier number is a subcarrier number obtained by dividing the subcarrier number of 5G by M;
And the first constraint unit is used for carrying out calling quantity constraint on the N base functions according to the first orthogonal multiplexing subcarrier number.
Various embodiments in the present disclosure are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the foregoing 5G new waveform method and specific example based on an orthogonal multi-wavelet packet in the first embodiment of fig. 1 are equally applicable to a 5G new waveform system based on an orthogonal multi-wavelet packet in the present embodiment, and by the foregoing detailed description of a 5G new waveform method based on an orthogonal multi-wavelet packet, those skilled in the art can clearly know that a 5G new waveform system based on an orthogonal multi-wavelet packet in the present embodiment, so that for brevity of the description will not be described in detail herein. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Exemplary electronic device
An electronic device of an embodiment of the present application is described below with reference to fig. 5.
Fig. 5 illustrates a schematic structural diagram of an electronic device according to an embodiment of the present application.
Based on the inventive concept of a 5G new waveform method based on an orthogonal multi-wavelet packet as in the previous embodiments, the present invention further provides a 5G new waveform system based on an orthogonal multi-wavelet packet, on which a computer program is stored, which when executed by a processor, implements the steps of any of the above-described 5G new waveform method based on an orthogonal multi-wavelet packet.
Where in FIG. 5, a bus architecture (represented by bus 300), bus 300 may comprise any number of interconnected buses and bridges, with bus 300 linking together various circuits, including one or more processors, represented by processor 302, and memory, represented by memory 304. Bus 300 may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., as are well known in the art and, therefore, will not be described further herein. Bus interface 305 provides an interface between bus 300 and receiver 301 and transmitter 303. The receiver 301 and the transmitter 303 may be the same element, i.e. a transceiver, for providing a unit for communicating with various other apparatus over a transmission medium.
The processor 302 is responsible for managing the bus 300 and general processing, while the memory 304 may be used to store data used by the processor 302 in performing operations.
The application provides a 5G new waveform method based on an orthogonal multi-wavelet packet, wherein the method comprises the following steps: obtaining first transmission data; generating primary expansion data by performing serial-parallel conversion on the first transmission data, wherein the primary expansion data comprises N expansion data; performing secondary serial-parallel conversion on each of the N extension data to generate secondary extension data, wherein each of the primary extension data and each of the secondary extension data are in a mapping relation of 1 to M; the multiplexing expansion data is obtained by carrying out time shifting multiplexing processing on the secondary expansion data; according to the first calling instruction, N basic functions are called; respectively inputting the N basic functions into the secondary expansion data for modulation to generate N modulation waveforms; fitting and reconstructing the N modulation waveforms to generate a first reconstruction waveform; and outputting the first reconstruction waveform through a digital-to-analog conversion unit. The method solves the technical problems that the OFDM signal has high peak value average power ratio in the time domain, the power band outside the attenuation deceleration is insufficient, and the bandwidth of the sub-channel cannot be distributed unevenly in the prior art. Besides the traditional frequency division multiplexing in the frequency domain through the multi-wavelet base, the orthogonal multiplexing is realized by utilizing the integer time shift characteristic of the multi-wavelet base in the time domain, the peak-to-average ratio, the side lobe power and the calculation complexity of the system are effectively reduced while fewer subcarriers are transmitted and the current 5G NR data rate is approximate, the frequency band utilization rate is improved, and the capacity of unevenly dividing the frequency band is realized so as to meet the technical effect of differentiation requirements.
It will be apparent to those skilled in the art that embodiments of the present application may be provided as a method, apparatus, or computer program product. Accordingly, the present application may take the form of an entirely software embodiment, an entirely hardware embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application is in the form of a computer program product that can be embodied on one or more computer-usable storage media including computer-usable program code. And the computer-usable storage medium includes, but is not limited to: u disk, mobile hard disk, read-0nly Memory (ROM), RAM (Random Access Memory, RAM), magnetic disk Memory, CD-ROM (Compact Disc Read-Only Memory), optical Memory, etc. for storing program codes.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a system for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks. While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. A 5G new waveform method based on orthogonal multi-wavelet packets, wherein the method comprises:
obtaining first transmission data;
generating primary expansion data by performing serial-parallel conversion on the first transmission data, wherein the primary expansion data comprises N expansion data, and the primary expansion data is time domain expansion data generated after the primary serial-parallel conversion;
Performing secondary serial-parallel conversion on each of the N extension data to generate secondary extension data, wherein each of the primary extension data and each of the secondary extension data are in a mapping relation of 1 to M;
The multiplexing expansion data is obtained by carrying out time shifting multiplexing processing on the secondary expansion data;
according to the first calling instruction, N basic functions are called;
respectively inputting the N basic functions into the secondary expansion data for modulation to generate N modulation waveforms;
fitting and reconstructing the N modulation waveforms to generate a first reconstruction waveform;
and outputting the first reconstruction waveform through a digital-to-analog conversion unit.
2. The method of claim 1, wherein the multiplexed extension data is obtained by time-shift multiplexing the secondary extension data, the method further comprising:
obtaining first extension data of the primary extension data;
Obtaining M mapping extension data corresponding to the first extension data;
Generating first multiplexing expansion data by sequentially performing equal dislocation processing on the M mapping expansion data, wherein the equal dislocation processing is backward dislocation preset hysteresis value, and the hysteresis time shift value of the equal dislocation processing is
And based on the first multiplexing expansion data, carrying out sequential orthogonal multiplexing processing on N expansion data in the primary expansion data to obtain the multiplexing expansion data.
3. The method of claim 1, wherein the method further comprises:
obtaining the number of 5G subcarriers;
Obtaining a first orthogonal multiplexing subcarrier number according to the 5G subcarrier number, wherein the first orthogonal multiplexing subcarrier number is a subcarrier number obtained by dividing the 5G subcarrier number by M;
And carrying out calling quantity constraint on the N base functions according to the first orthogonal multiplexing subcarrier quantity.
4. The method of claim 2, wherein the equal-dislocation processing is implemented according to an integer time-shifted orthogonal property of the multi-wavelets, the integer time-shifted orthogonal property being expressed by a first constraint, the first constraint being:
<Wn(t―m),Wn(t―k)>≥δ(k-m)Ir×r
wherein < > represents an inner product, n is equal to or greater than 0, and m, k.epsilon.Z.
5. The method of claim 1, wherein the transmission signal based on the frequency domain orthogonal multiplexing is expressed by a first calculation formula, the first calculation formula being:
Wherein the number of subcarriers n=r.2 2 L,pk (t) is a multi-wavelet sub-function, where r is the number of multi-wavelet weights and L is the number of multi-wavelet packet decomposition layers.
6. The method of claim 4, wherein the multi-wavelet packet orthogonal frequency division multiplexing is formulated by a second computational formula based on a frequency domain orthogonal multiplexing basis and the first constraint, the second computational formula being:
Wherein, the number of subcarriers n=r.2 2 L, r is the multiple wavelet weight, L is the multiple wavelet packet decomposition layer number, and M is the multiple wavelet time domain support length.
7. A 5G new waveform system based on orthogonal multi-wavelet packets, wherein the system comprises:
A first obtaining unit: the first obtaining unit is used for obtaining first sending data;
A first expansion unit: the first expansion unit is configured to generate primary expansion data by performing serial-to-parallel conversion on the first transmission data, where the primary expansion data includes N expansion data, and the primary expansion data is time domain expansion data generated after the primary serial-to-parallel conversion;
A second expansion unit: the second expansion unit is used for performing secondary serial-parallel conversion on each expansion data in the N expansion data to generate secondary expansion data, wherein each expansion data in the primary expansion data and each expansion data in the secondary expansion data are in a mapping relation of 1 to M;
A second obtaining unit: the second obtaining unit is used for obtaining multiplexing expansion data by performing time shifting multiplexing processing on the secondary expansion data;
a first calling unit: the first calling unit is used for calling N basic functions according to a first calling instruction;
A first modulation unit: the first modulating unit is used for respectively inputting the N basic functions into the secondary expansion data to modulate, and generating N modulating waveforms;
A first generation unit: the first generating unit is used for generating a first reconstruction waveform by fitting and reconstructing the N modulation waveforms;
a first output unit: the first output unit is used for outputting the first reconstruction waveform through the digital-to-analog conversion unit.
8. A 5G new waveform system based on orthogonal multi-wavelet packets comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps of the method of any one of claims 1 to 6 when the program is executed by the processor.
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