FrFT-OFDM系统中联合ICI自消除方案

doi:10.12305/j.issn.1001-506X.2022.08.30

Abstract

Abstract:

In order to solve the problem of inter-carrier interference (ICI) in fractional Fourier transform orthogonal frequency division multiplexing (FrFT-OFDM) system caused by time-frequency double selective channel, a joint self-cancellation scheme based on ICI self-cancellation coding and frequency offset compensation is proposed. In this scheme, the self-cancellation matrix with phase compensation is used to encode the signal. By taking advantage of the structural advantage of the adjustable rotation angle of the subcarriers in the FrFT-OFDM system, the fractional Fourier transform is carried out under the appropriate rotation angle to compensate the frequency offset, so as to achieve better ICI suppression effect than the traditional ICI self-cancellation technology under the same coding efficiency. The simulation results verify the performance of the scheme.

Key words: fractional Fourier transform orthogonal frequency division multiplexing (FrFT-OFDM), inter-carrier interference (ICI), self-cancellation coding, frequency offset compensation

CLC Number:

TN929

Zhenduo WANG, Yunfei ZHU, Xiaoyan NING, Ming DIAO. Combined ICI self-cancellation scheme for FrFT-OFDM system[J]. Systems Engineering and Electronics, 2022, 44(8): 2645-2651.

Figures/Tables 8

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Combined ICI self-cancellation scheme for FrFT-OFDM system

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