【摘要】 本文在一些理想化条件下,借助仿真手段研究了与多用户分集相关的两个问题,一是信道信息误差对用户分配和速率分配的影响各有什么不同;二是系统吞吐量同信道分配单元大小的关系.结果表明,信道信息误差对系统吞吐量的影响主要是因为速率选择错误的原因,错选用户这一因素的影响相对较小;同时,信道分配单元也不是越小越好,适当提高分配单元的大小可以在一定程度上减轻信道信息误差的影响.更多还原

【Abstract】 In the paper, two problems on multiuser diversity are discussed by way of simulation under some perfect assumption. One is the impact of channel information error to user scheduling and transmission mode selection; the other is the relation between system throughput and the size of channel allocation unit. The results indicate that the system throughput is more sensitive to the data rate selection error than to the user selection error and both errors are incurred by the inaccurate channel information. It’s also observed that, when the channel information is not sufficiently reliable, extending the channel allocation unit can, to some extent, lessen the impact of channel information error. 更多还原