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结合小波变换与无损压缩的CSI反馈技术

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摘要 本文针对认知无线电中信道状态信息(Channel State Information,CSI)的快速高效交互的迫切需求,从单天线远距离无线通信场景出发,提出了结合小波变换和无损压缩的CSI信息反馈方法。接收端感知以接收信噪比(Signal-Noise Ratio,SNR)为核心的无线信道CSI信息,经过小波变换与Lempel-Ziv-Welch(LZW)算法压缩后,保留绝大部分有用CSI信息的同时,可大大减少需要传输的CSI数据量,从而实现收发双方的CSI信息快速高效交互,为基于认知的通信参数及时重构调整获得更好通信效能奠定了基础。同时,还可以根据小波变换特性,实现不同频段的压缩尺度按需配置,以提升CSI信息的整体压缩效果和传输资源的利用效率。
作者 肖文奎
出处 《电子技术与软件工程》 2022年第1期85-88,共4页 ELECTRONIC TECHNOLOGY & SOFTWARE ENGINEERING
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