摘要
传输预处理技术可以降低下行链路终端的处理复杂度和功耗,但它的前提条件是发射端已知信道信息,目前的传输预处理算法都是假设通过信道估计的信道冲激响应值就是理想的信道信息。但是,在实际系统中,不可能已知精确的信道信息,非理想的信道估计对传输预处理的性能会造成影响。研究了信道估计对信道奇异值分解(SVD)和联合传输(JT)两种传输预处理算法性能的影响,分析了估计误差项及其产生原因,通过仿真进一步验证了理论结果。
Rx oriented transmission can reduce the complexity and power of terminal unit in downlink, but it is based on channel knowledge estimation. The present Rx oriented transmission algorithms mostly suppose the channel＇s impulse response is the perfect channel knowledge. However, the exact channel knowledge cannot be obtained and the imperfect channel estimation may influence the performance of Rx oriented transmission in practice. Thus, this paper studies the influence of channel estimation on singular value deeomposition（SVD）and joint transmission（JT）, analyzes the error and its cause, and validates the theoretical result by simulation.
出处
《重庆邮电大学学报（自然科学版）》
2007年第5期551-553,共3页
Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)
基金
国家自然科学基金(60572089)
重庆市教委应用基础研究基金
重庆市自然科学基金资助
