【摘要】 给出了带噪声反差反馈的多输入多输出系统连续干扰抵消检测符号错误概率公式。考虑了使用M-QAM的BLAST系统在平衰落瑞利信道。符号错误概率公式基于每根天线的功率可能不一致。研究了最小化VSER所需的功率分配算法的解析式。对于实际系统,提出了一种次优化的方法,可以明显的减低复杂度。不同于以前的闭环反馈系统,新的方案只需要最小的反馈开销,同时接收端不需要任何功率计算。仿真结果表明所述功率分配算法能带来性能增益。更多还原

【Abstract】 Expressions for the vector symbol error rate(VSER) for successive interference cancellation(SIC) detection of multiple-input-multiple-output(MIMO) systems with addictive Gaussian noise variance feedback were derived.In particular,Bell Laboratories Layered Space-Time(BLAST) systems with M-QAM modulation over flat Rayleigh fading channels were considered.The vector symbol error rate(VSER) expression was obtained based on that the transmit powers of each antenna could be not uniform.Analytic method of power allocation was investigated to minimize the VSER.For practical implementation,a computer-search method that gave suboptimal performance with very low complexity was also developed.Unlike previous closed-loop power allocation schemes,the novel scheme requires the lowest feedback overhead,and needs no power allocation scheme computation at the receiver.Simulation results prove the performance gain of our proposed power allocation technique更多还原