SDMA系统DL方案阻塞率的仿真

Simulation of Blocking Probability for DL Scheme in SDMA System

多址接入技术是无线通信系统设计的一个重要因素,未来无线通信系统将广泛采用空分多址(SDMA)接入技术来提高系统容量。比如在频分复用(FDMA),时分复用(TDMA),码分复用(CDMA)。介绍了Erlang-B分布这一典型的业务分配模型,并考虑了SDMA系统中DL信道分配机制,给出了理论推导,并采用一般的排队论模型对数字蜂窝移动通信系统中SDMA技术进行仿真。仿真结果表明:采用DL信道分配机制以后,用户可以在同一时间共享同一信道。

Multiple access is an important technology in the design of wireless communication system.Space division multiple access（SDMA） would be superimposed on the traditional multiple access schemes,thus to increase the system capacity,including frequency division multiple access（FDMA）,time division multiple access（TDMA） or code division multiple access（CDMA）.This paper,describes a typical business allocation model—Erlang-B.Based on the theoretical analysis,the blocking probability of the DL scheme is simulated,and with the same queuing theory model,the SDMA technology in the cellular digital communication system is also simulated.The simulation results indicate that,with DL channel allocation mechanism,the user could at the same time share the same channel.