-SCDMA系统的动态空间CDMA信道分配
ynamic Spatial CDMA Channel Assignments for TD-SCDMA Systems
在目前的TD-SCDMA（时分-同步码分多址）系统中，智能天线由于受到空间分辨率的限制，只能为移动用户提供相互重叠的16条数字波束。为进一步提高系统容量，本文提出利用8阵元智能天线的波束宽度来构成智能天线所能支持的扇区，这些扇区又能分成若干相互正交的扇区。在此基础上，提出了一种动态空间的CDMA信道分配方式。在空间正交扇区中，更多的移动用户能够无码间干扰地共享公共CDMA信道。因此，共处于同一小区中的用户数可增加几倍。我们证明，其他扇区的干扰（亦是MAI）可被有效抑制。本文提供了TD-SCDMA系统基于WLS的多用户检测的通信容量计算方法。系统的性能仿真结果验证：当系统用户大量增加时TD-SCDMA 系统仍可具有较好的SINR与BER性能。
imited by the space resolution of smart antenna, current TD-SCDMA （Time Duplex-Synchronous CDMA） system can provide 16 digital space beams that are overlapping each other for mobile users. In order to enlarge the capacity of TD-SCDMA system, this paper proposes to use the width of the beams with 8 array elements of smart antenna to construct sectors supported by smart antenna. These sectors can be divided into ones to be orthogonal each other. Based on the approach, we develop a dynamical spatial assignment for CDMA channel. In the sectors to be spatially orthogonal, more mobile users can share common CDMA channel without multi asses interference (MAI). Thus, the user number can be increased several times. We show that the interference of other sectors, also to be MAI, can be effectively suppressed by the array antennas for a sectored TD-SCDMA system. The capacity calculating based on WLS multiuser detector in the TD-SCDMA systems is presented. Simulations show that a sectored TD-SCDM
鲁凌云、肖扬
通信无线通信
MA信道分配-SCDMA空间正交扇区簇通信容量
communication capacity multiuser detection CDMA systems array antennas
鲁凌云,肖扬.-SCDMA系统的动态空间CDMA信道分配[EB/OL].(2004-05-12)[2025-08-03].http://www.paper.edu.cn/releasepaper/content/200405-33.点此复制
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