Elliptic spherical wave frequency domain multi-carrier modulation and demodulation method

An ellipsoidal wave and multi-carrier modulation technology, which is applied in the field of information transmission, can solve the problems of high complexity of PSWFs modulation algorithm and limit the application of PSWFs signals, and achieve excellent system compatibility, reduce algorithm complexity, and generate low modulation signals Effect

Active Publication Date: 2020-03-17
NAVAL AVIATION UNIV
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The algorithmic complexity of the modulation method is closely related to the number of sampling points, so PSWFs modulation has the disadvantage of high algorithmic complexity
In addition, communication systems such as Wi-Fi and LTE generally use the IFFT / FFT signal processing framework to perform signal processing in the frequency domain, and the 5G system still considers using this signal processing framework, which severely limits the application of PSWFs signals in this system

Method used

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  • Elliptic spherical wave frequency domain multi-carrier modulation and demodulation method
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  • Elliptic spherical wave frequency domain multi-carrier modulation and demodulation method

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Experimental program
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Effect test

Embodiment 1

[0083] Embodiment 1: Generation of multi-carrier modulation signals in the frequency domain of a single sub-band ellipsoidal wave

[0084] Assuming that the PSWFs signal time-bandwidth product is c, select the c-k branch PSWFs signal for information transmission; on both sides of the center frequency of the sub-band in the frequency domain, intercept c / 2+N P frequency sampling points, that is, using c+2N in the frequency domain P A frequency sampling point represents the PSWFs signal and is used to carry information. Among them, N P , the value of k can be selected according to the requirements of the system on the energy aggregation of the modulated signal, the degree of out-of-band energy leakage, and the PSWFs signal parameters.

[0085] In order to better illustrate the advantages of the present invention, the embodiment uses PSWFs time-domain quadrature modulation (Wang Hongxing, Zhao Zhiyong, Liu Xiguo, etc. Non-sinusoidal time-domain quadrature modulation method: ZL20...

Embodiment 2

[0107] Embodiment 2: Multiple sub-band frequency domain ellipsoidal wave frequency domain multi-carrier modulation signal generation

[0108] According to the signal processing steps of multi-carrier modulation signal generated by frequency domain ellipsoidal wave frequency domain of multiple sub-bands, the relevant parameters are set as follows:

[0109] Number of sub-bands: L=3;

[0110] Ellipse spherical wave signal time width: T = 1s;

[0111] Ellipse spherical wave signal bandwidth: B=36Hz;

[0112] Ellipsoidal wave signal time-bandwidth product: c=BT=36Hz·s

[0113] Complex number field mapping base number: M=4;

[0114] Number of ellipsoidal wave signal channels: c-k=35;

[0115] Number of sampling points in the frequency domain of the ellipsoidal wave signal: N F =3c+2N P =180.

[0116] Under the above conditions, according to figure 1 , image 3 , Figure 4 , follow the steps below to demodulate the PSWFs modulated signal in the frequency domain:

[0117] ①...

Embodiment 3

[0128] Embodiment 3: Frequency domain demodulation of ellipsoidal wave signal

[0129] In order to better illustrate the advantages of the present invention, the embodiment uses PSWFs time-domain quadrature modulation (Wang Hongxing, Zhao Zhiyong, Liu Xiguo, etc. Non-sinusoidal time-domain quadrature modulation method: ZL200810159238.3[P].2011-02-02.) As a comparison. According to the signal processing steps of the frequency domain demodulation method of the multi-carrier modulated signal of the ellipsoidal wave frequency domain, on the basis of Embodiment 1, the relevant parameters are additionally set as follows:

[0130] Channel conditions: additive white Gaussian noise channel (AWGN);

[0131] Transmission information volume: 1×10 7 bit.

[0132] Under the above conditions, the PSWFs modulated signal is demodulated in the frequency domain according to the following steps.

[0133] ① At the receiving end, use the FFT module to obtain the frequency domain signal R(jw) co...

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Abstract

The invention provides an elliptic spherical wave frequency domain multi-carrier modulation and demodulation method, and belongs to the technical field of information transmission. According to the method, ellipsoidal wave signal processing is expanded from a time domain to a frequency domain, and information loading and detection are carried out in the frequency domain. At a transmitting end, according to the odd-even symmetry characteristic of a signal frequency domain, a frequency domain modulation signal is generated by adopting a grouping processing and symmetrical expansion mode; at a receiving end, according to the characteristic that orthogonality of signals with the same odd-even symmetry is the same as orthogonality of signals with the same odd-even symmetry in a half wavelet band frequency range and the whole wavelet band frequency range, odd-even symmetry signals are grouped, the half wavelet band frequency signals are used for detection, and the number of numerical solution points of the signals participating in operation is reduced. Compared with traditional time domain quadrature modulation based on elliptic spherical waves, the method provided by the invention can significantly reduce the algorithm complexity on the premise of not changing the system frequency band utilization rate, the system error code performance, the modulation signal energy aggregation andthe signal peak-to-average power ratio.

Description

technical field [0001] The present invention relates to radio communication technology, more specifically, the present invention relates to an ellipsoidal wave frequency domain multi-carrier modulation and demodulation method, which belongs to the technical field of information transmission. Background technique [0002] With the diversification of communication scenarios, such as the three scenarios of 5G enhanced mobile broadband, low power consumption and high reliability, and low latency and high reliability, the level of information interaction between different information carriers is constantly improving, not only the requirements for the "quality" of information interaction are getting higher and higher. The higher the increase, the higher the requirements for the "volume" of information interaction. How to make full use of existing spectrum resources and improve system frequency band utilization and time-frequency resource utilization has become the focus of attenti...

Claims

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Application Information

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IPC IPC(8): H04L27/26
CPCH04L27/2601H04L27/2628H04L27/265
Inventor 王红星陆发平刘传辉康家方
Owner NAVAL AVIATION UNIV
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