一种新的多天线准正交CDMA多用户系统及其检测方法  

A novel multi-antenna quasi-orthogonal CDMA multi-user system and its detection

作　　者：朱有团[1] 朱近康[1] 

机构地区：[1]中国科学技术大学电子工程与信息科学系,安徽合肥230027

出　　处：《电路与系统学报》2008年第5期34-38,共5页Journal of Circuits and Systems

基　　金：国家863基金资助项目(2003AA12331003);国家自然科学基金资助项目(60242003)

摘　　要：本文提出了一种新的基于准正交内插Walsh序列的多天线CDMA多用户系统。该系统使用扩展的内插Walsh序列生成大量准正交内插Walsh序列,每个用户使用一个序列。接收端采用多天线,每个天线的数据和所有Walsh序列做相关,联合检测这些相关值就可以检测出所有用户的数据。在复杂散射的信道中,该系统可支持的最大用户数是Walsh序列长度乘以接收天线数,极大的增加了可同时接入的用户数。同时得出了内插Walsh序列生成矩阵必须列不相关及列重不小于接收天线数的条件。In the novel system, each user uses a quasi-orthogonal inserted walsh sequence, which is generated by the improved method. In the receiver, multi-antenna is implemented, and joint detection is adopted through the correlation values between the received signals from each antenna and all Walsh sequences. In rich scattering channel, the number of users that the system can support at a time can reach the sequence length multiplied the number of receiver antenna. Restriction conditions that the sequence generating matrix must uncorrelate in columns and the sum of each column must not less than the number of antennas in the receiver are also obtained.

关 键 词：准正交 内插Walsh序列 多天线CDMA 多用户检测 

分 类 号：TN929.5[电子电信—通信与信息系统]