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Multi-carrier modulation and demodulation method of ellipsoidal wave in frequency domain

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 the effect of optimal system compatibility and reduction of algorithm complexity

Active Publication Date: 2022-03-11
NAVAL AVIATION UNIV
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  • Abstract
  • Description
  • Claims
  • 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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  • Multi-carrier modulation and demodulation method of ellipsoidal wave in frequency domain
  • Multi-carrier modulation and demodulation method of ellipsoidal wave in frequency domain
  • Multi-carrier modulation and demodulation method of ellipsoidal wave in frequency domain

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Experimental program
Comparison scheme
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 ellipsoidal wave frequency domain multi-carrier modulation and demodulation method, which belongs to the technical field of information transmission. This method extends the processing of the ellipsoidal wave signal from the time domain to the frequency domain, and performs information loading and detection in the frequency domain. At the transmitting end, according to the characteristics of the parity symmetry in the frequency domain of the signal, the frequency domain modulation signal is generated by group processing and symmetrical expansion; The frequency range of the wave band has the same orthogonality characteristics, and the odd symmetric and even symmetric signals are grouped and processed, and half of the sub-band frequency signal is used for detection, reducing the number of signal numerical solution points involved in the operation. Compared with the traditional time-domain quadrature modulation based on ellipsoidal waves, the method provided by the present invention can significantly improve Reduce algorithm complexity.

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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Patent Type & Authority Patents(China)
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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