一种采用信号虚拟分解的多址接入方法

doi:10.19665/j.issn1001-2400.2023.01.002

Abstract

Abstract:

Co-channel interference (CCI) is a key factor that impedes the improvement of a wireless communication system’s performance.Existing signal processing based multi-user transmission schemes avoid CCI by adjusting the interfering signals.However,they may degrade the performance of data transmissions carried in the adjusted signals.By exploiting interactions among wireless signals,a virtual signal decomposition based multiple access (VSDMA) method is proposed.By employing a coordinate transmitter (Tx) and letting it send a coordinate signal to interact with signal components originating from multiple interfering Txs at the common receiver (Rx),the Rx can recover multiple orthogonal desired signals without interference.The proposed method can not only avoid the degradation of desired transmission’s quality incurred by adjusting the transmitted signal at the Tx but also circumvent the problem of the desired signal’s power loss at the common Rx while it suppresses interference.Simulation results have shown that compared to existing schemes,given a signal-to-noise ratio greater than 0dB,our method can improve the spectral efficiency (SE) and power normalized SE of the multi-user communication system by over 10%.

Key words: multi-user communication, multiple access, signal processing, interference management

CLC Number:

TN929.5

LI Zhao,HU Jiaojiao. Virtual signal decomposition based multiple access method[J].Journal of Xidian University, 2023, 50(1): 12-18.

Figures/Tables 3

References 13

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Virtual signal decomposition based multiple access method

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