基于IEEE 802.11be标准的高阶调制信号的解调算法分析

Analysis of Demodulation Algorithm for High-Level Modulated Signal Based on IEEE 802.11be Standard

针对IEEE 802.11be标准采用的4096QAM高阶调制信号,提出了一种基于data字段的Wi-Fi信号解调方法,设计了一套完整的Wi-Fi信号解调算法流程。首先,基于前导序列进行帧同步,再利用前导序列中的L-LTF进行载波频偏估计与补偿;其次,根据data字段确定调制类型及空分复用类型,进行信道估计和相位补偿;最后,对补偿后的数据进行解调处理,获得信号质量结果。经过采集数据实验,验证了该算法可有效实现IEEE 802.11be标准Wi-Fi信号的解调。

For the 4096QAM high-level modulated signal adopted by IEEE 802.11be standard,this paper proposes a Wi-Fi signal demodulation method based on data field,and designs a complete set of Wi-Fi signal demodulation algorithm flow.First,frame synchronization is carried out based on the leading sequence,and then L-LTF in the leading sequence is used for carrier frequency offset estimation and compensation.After that,the modulation type and the space division multiplexing type are determined according to the data field,and the channel estimation and phase compensation are performed.Finally,the compensated data are demodulated to obtain signal quality results.The experimental results indicate that this algorithm can realize the demodulation of IEEE 802.11be Wi-Fi signal effectively.