摘要
802.11be系统中IQ不平衡对信号解调性能影响较大,针对IQ不平衡中的两个主要部分,即幅度不平衡和相位不平衡,文中提出了一种基于802.11be的LSTF和LLTF联合估计IQ不平衡的方法。首先,将原始IQ数据变采样到协议规定的采样率后,并按照IEEE 802.11be协议标准,生成理想LSTF序列和LLTF序列。然后,利用理想LSTF序列和变采样后的数据进行相关运算,找出相关峰值,获取到接收序列的LSTF同步起始位置。再将理想发送的LSTF序列和同步后的接收LSTF序列进行前后项联合,建立方程组,通过求解方程组的形式,计算幅度不平衡和相位不平衡。最后,再将补偿幅度不平衡后的接收LLTF序列和理想LLTF序列进行联合,二次计算相位不平衡估计值。
In the 802.11be system,IQ imbalance significantly affects signal demodulation performance.Addressing the two main components of IQ imbalance,namely amplitude imbalance and phase imbalance,this paper proposes a method for joint estimation of IQ imbalance based on 802.11be LSTF and LLTF.Firstly,the original IQ data is resampled to the sampling rate specified by the protocol,and ideal LSTF and LLTF sequences are generated according to the IEEE 802.11be protocol standard.Then,the ideal LSTF sequence and the resampled data are correlated to find the correlation peak and obtain the LSTF synchronization start position of the received sequence.Next,the ideal transmitted LSTF sequence and the synchronized received LSTF sequence are concatenated,forming an equation system.By solving this system,the amplitude and phase imbalances are calculated.Finally,the compensated amplitude-imbalanced received LLTF sequence and the ideal LLTF sequence are concatenated to calculate the phase imbalance estimation value again.
作者
徐俊
许虎
张煜
李明福
XU Jun;XU Hu;ZHANG Yu;LI Mingfu(Ceyear Technologies(Anhui)Co.,Ltd.,Bengbu,Anhui 233010,China;Bengbu Technology Innovation Center on Electronic Measurement Instrumentation Technology,Bengbu,Anhui 233010,China)
出处
《移动信息》
2026年第1期330-332,共3页
Mobile Information
基金
安徽省重点研发计划项目:低成本高精度低轨卫星通信嵌入式监测设备研发及产业化(202304a05020002)。
