码分多址移动通信系统中的一种新智能天线结构

New Smart Antenna Receiver Structure in CDMA Mobile Communication Systems

利用码分多址 ( CDMA)系统中的用户伪随机 ( PN)码信息 ,提出了一种新的自适应智能天线结构 .它采用双参考信号的特殊结构 ,同传统的智能天线结构相比 ,既不依赖需要占用系统带宽的训练序列 ,也不会造成具有较大延时的反馈环路 .为验证这一新智能天线结构的性能 ,提出了一种实现算法 ,并进行了收敛性分析 .仿真结果表明 ,该智能天线结构及其算法在无训练序列的 CD-MA环境下完全可行 。

A new receiver structure was proposed for adaptive smart antennas in CDMA mobile communication systems, requiring only the knowledge of the desired user's pseudo noise (PN) code sequence. With a special structure based on a pair of reference signals, it has several advantages over the conventional structures, i.e. there is neither need of training signal, which may degrade the spectrum efficiency, nor need of feedback circuit that may suffer from large delay and other drawbacks. In order to test the feasibility of the new structure, an algorithm was also provided as a possible realization of the structure. The convergence of the algorithm was also provided. The simulation results show that the algorithm under the new receiver structure works well in a CDMA environment without training signal, and its performance approximates to that of its counterparts, which is dependent on the training signals.