宽带无线信道时频特性的测量与分析  

Time-frequency analysis of WCDMA channels based on real measurements

作　　者：徐韦[1] 陈国安[1] 倪祖耀[1] 王京[1] 

机构地区：[1]清华大学电子工程系微波与数字通信国家重点实验室,北京100084

出　　处：《清华大学学报（自然科学版）》2003年第7期946-949,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家"八六三"高技术项目(863-317-03-01-01-05-20)

摘　　要：为了获得宽带码分多址(WCDMA)无线信道在2GHz频段5MHz带宽特有的传输特性,采用扩频滑动相关的信道测量方法,以瞬时时延功率谱为基础对实测信道数据进行了分析,得到了Doppler扩展、相干带宽和多径时延扩展等参数在宽带无线信道中的统计特性。考察了接收机的移动速度对信道参数的影响及直射路径从有到无的过程中信道发生的变化。测量数据和分析结论为WCDMA系统设计和优化提供了可靠依据。Field test data was analyze d to determine the characteristics of wideband code division multiple access (WCD MA) wireless channel signals with a bandwidth of 5 MHz at 2 GHz. The data was obtained using the 'spread spectrum sliding correlator channel sou nding' technique and statistics for key parameters, including the Dopper shift, the coherent bandwidth and the multipath delay spread, were calculated for vari ous environments from the instantaneous power delay profiles. The results were u sed to analyze the effect of receiver velocity on the channel parameters and th e variation incurred by the lost of line of sight (LOS). These results can be ut ilized to reconstruct the channel response to optimize wireless system design.

关 键 词：移动通信 宽带码分多址移动通信 WCDMA 宽带无线信道 时频特性 信道测量 无线通信 

分 类 号：TN929.533[电子电信—通信与信息系统]