无线通信信道凸峰型包络时域均衡器长度研究  

Research on the length of convex envelope time domain equalizer in wireless communication channel

作　　者：蔡一再 闻建刚 方振宇 邹园萍[1] 华惊宇 CAI Yizai;WEN Jiangang;FANG Zhenyu;ZOU Yuanping;HUA Jingyu(School of Information and Electronic Engineering,Zhejiang Gongshang University,Hangzhou Zhejiang 310018,China)

机构地区：[1]浙江工商大学信电学院,浙江杭州310018

出　　处：《杭州电子科技大学学报（自然科学版）》2022年第5期34-39,75,共7页Journal of Hangzhou Dianzi University：Natural Sciences

基　　金：浙江省自然科学基金资助项目(LQ21F010008)。

摘　　要：无线信道的凸峰型包络致使局部均衡效果下降,需要谨慎选择均衡器长度。首先,通过直接求逆和广义求逆两种方式实现均衡器的求解;然后,通过分析信道系数托普利兹矩阵的条件数和信号干扰噪声比(Signal to Interference plus Noise Ratio,SINR)来探究局部均衡失效与它们之间的关系,尽可能以低复杂度实现高可靠均衡,避免产生SINR局部凹点。仿真实验结果表明,直接求逆中,当有噪信道系数的托普利兹条件数持续增长到一定范围时,均衡器长度达到最低门限长度;当均衡器长度对应的信道托普利兹条件数大于或小于其临近两边均衡器长度对应的条件数,且差值大于3时,出现性能凹点的概率比较大。The convex envelope of wireless channel will lead to the decline of local equalization effect,so the equalizer length needs to be carefully selected.The equalizer is solved by direct inversion and generalized inversion.By analyzing the condition number of channel coefficient Toeplitz matrix and equilibrium signal to noise ratio SINR,the local equilibrium failure is explored.Then,high reliable equalization can be achieved as low complexity as possible,and the occurrence of SINR local concave point can be avoided.The results show that when the Toeplitz condition number of the noise channel coefficient increases to a certain range,the TEQ length is the minimum threshold length.And when the channel Toeplitz condition numbers corresponding to a certain TEQ length are greater than or less than the condition numbers corresponding to the TEQ length on both sides of the adjacent TEQ length,and the difference is greater than 3,there is a greater probability of SINR point.

关 键 词：时域均衡器 SINR信道包络 广义求逆 

分 类 号：TN929.5[电子电信—通信与信息系统]