异步滑动相关MIMO信道测试方法  

Non-synchronous Sliding Correlation MIMO Channel Sounding Method

作　　者：程如琪 纪文莉 郑国莘[1] Cheng Ruqi

机构地区：[1]上海大学特种光纤与光接入网重点实验室,特种光纤与先进通信国际合作联合实验室,上海先进通信与数据科学研究院,上海200444 [2]上海申通地铁集团有限公司技术中心,上海201103

出　　处：《工业控制计算机》2020年第5期32-34,共3页Industrial Control Computer

基　　金：2019-2022国家自然科学基金(NSFC61871261),漏泄电缆的群信道的相关性及其MIMO系统综合性能的研究。

摘　　要：为了解决无线信道测试工程中射频与PN码在收发端都无法同步的问题,提出了一种采用异步滑动相关MIMO信道测试方法。为了实现射频异频补偿,在训练阶段存储收发端间频差数据,测试阶段接收端在收发异频情况下解调测试数据,在数据分析阶段,根据训练阶段频差数据计算异频系数,并通过正交频差相关运算补偿基带信号因射频频差产生的幅度抖动。为了实现PN码的异频补偿,通过对基带信号上采样和下采样补偿PN样本频差造成的抽样时刻偏移,通过PN序列滑动相关获得信道冲激响应。理论分析与实验验证表明,提出的方法对实现特殊条件下收发端无法同步的无线信道测试具有重要意义。In order to solve the problem that the RF(Radio Frequency)and PN sequence can not be synchronized at the transmitter and receiver in wireless channel sounding,this paper proposes a non-synchronous sliding correlation MIMO channel sounding method.In order to realize the compensation of RF frequency difference,the data of frequency difference between the transmitter and receiver is stored in the training step,and the test data is demodulated in the working step.In the data analysis step,the coefficient of frequency difference is calculated according to the data of frequency difference in the training step,and the amplitude jitter of baseband signal caused by RF frequency difference is compensated by orthogonal frequency difference correlation operation.In order to realize the frequency difference compensation of PN sequence,the sampling time offset caused by PN sample frequency difference is compensated by up sampling and down sampling of baseband signal,and the channel impulse response is obtained by PN sequence sliding correlation.

关 键 词：信道冲激响应 频差 PN样本误差 

分 类 号：TN929.5[电子电信—通信与信息系统]