摘要
给出了一种利用Tomlinson-Harashima预编码(Tomlinson-Harashima precoding,THP)结合接收波束成形的多用户多输入多输出系统的广播信道预编码方案。当移动台有多个接收天线时,基站采用迫零Tomlinson-Harashima预编码(zero-forcing THP,ZF-THP)消除多用户间干扰,同时每个移动台利用接收波束成形保证系统拥有最大和容量。进而分析了预编码时QR分解的2种最佳的排序方法,揭示出ZF-THP系统存在和容量最大和误码性能最优不能兼顾的问题,而提出方案作为一种有效折衷,比传统的未排序的ZF-THP系统具有更高的和容量与更好的误码率性能。
In this paper, a method of Tomlinson-Harashima precoding （THP） combined with receive beamforming （BF） is proposed for the multi-user MIM0 broadcast channel, which is called THP-BF. For the case of multi-antenna user termi- nals, the base station uses THP based on zero forcing （ZF） criteria to cancel multi-user interferences, and each users re- ceiver maximizes the system sum rate with receive beamforming. Then two ordering optimization methods for QR-type de- composition is analyzed, which reveals that there is an apparently inevitable tradeoff between the information rate and bit er- ror rate of the precoding system, and our proposed THP-BF is an effective technique for the tradeoff, thus it has more sum rate and better bit error rate （BER） performance than traditional unordered ZF-THP.
出处
《重庆邮电大学学报（自然科学版）》
CSCD
北大核心
2013年第5期569-573,共5页
Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)
基金
国家"973"计划项目(2012CB316103)
西安科技大学博士启动基金(2013QDJ036)
西安科技大学培养基金(201257)~~
