In this brief, we investigate the widely linear minimum mean square error (WLMMSE) successive interference cancellation (SIC) detector in multiple-input-multiple-output systems with rectilinear or quasi-rectilinear transmit signals. To this end, layer-wise approximate probability density functions (PDFs) of the post-detection signal-to-interference-plus-noise ratio are first derived. It is next shown that the so-derived PDFs enable explicit and concise performance evaluations in terms of the symbol error rate and the outage probability. For rigor, both the cases with and without inter-layer error propagation are addressed, and closed-form solutions are provided. Validity of theoretical analysis is demonstrated via Monte Carlo simulations.

在这个简介中，我们研究了具有直线或准直线发射信号的多输入多输出系统中的广泛线性最小均方误差 (WLMMSE) 连续干扰消除 (SIC) 检测器。为此，首先导出检测后信号与干扰加噪声比的逐层近似概率密度函数 (PDF)。接下来表明，如此导出的 PDF 能够在符号错误率和中断概率方面进行明确和简洁的性能评估。为严谨起见，讨论了有和没有层间错误传播的情况，并提供了封闭形式的解决方案。通过蒙特卡罗模拟证明了理论分析的有效性。