F-OFDM系统中的自适应EM相位噪声抑制算法

doi:10.11896/j.issn.1002-137X.2019.02.011

Abstract

Abstract: Filtered orthogonal frequency-division multiplexing (F-OFDM) is a new technology for next generation mobile communication system.F-OFDM can maintain the advantages such as strong anti-interference ability in OFDM system,and is adaptive for different flexible service configuration in the future.However,it’s more sensitive to phase noise than OFDM,which will cause sub-band common phase error (SCPE) and sub-band inter-carrier interference (SICI),thus seriously decreasing the performance of the system.This paper proposed a self-adaptive EM phase noise suppression algorithm (AEM-PNS) to reduce the phase noise in F-OFDM.It includes two sub-algorithms:EM-SCPE and EM-SICI.AEM-PNS can choose suitable phase noise suppression sub-algorithm automatically according to the inserted phase noise instruction symbol (PNIS) and pilot instruction symbol (PIS) in symbol frame.Simulation results show that the proposed algorithm can track phase noise adaptively,reduce the influence caused by phase noise effectively,and keep low complexity and high spectral efficiency simultaneously.

Key words: Expectation maximization, Filtered orthogonal frequency-division multiplexing, Self-adaptation, Sub-band common phase error, Sub-band inter-carrier interference

CLC Number:

TP391

CHEN Da-shuang, LI Ying-shan, WU Hong. Self-adaptive EM Phase Noise Suppression Algorithm in F-OFDM System[J].Computer Science, 2019, 46(2): 68-75.

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Self-adaptive EM Phase Noise Suppression Algorithm in F-OFDM System

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