有序V-BLAST的中断和出错率分析
On Outage and Error Rate Analysis of the Ordered V-BLAST
摘要：
中断和出错率性能的有序BLAST与2个以上的发射天线进行评估的i.i.d.瑞利衰落信道在任何SNR的第一步中断概率的上下限的数量推导，这是进一步用于获得准确的近似平均块和总出错率。对于m个Tx天线，在第一步骤处的最优排序的效果是m倍SNR增益。当m增大到无穷大时，BLER减小到零，这是V-BLAST中的空时自动编码效应的表现。虽然次优排序（基于投影前SNR）与最优排序相比遭受几dB SNR损失，但与无序V-BLAST相比，其具有较低的计算复杂性和3 dB SNR增益，并且对于低复杂性/低能量系统而言可以是有吸引力的解决方案。未编码的D-BLAST表现出与V-BLAST相同的中断和出错率性能。的线性接收机接口相比，BLAST的SNR惩罚也进行了评估。
英文摘要：
Outage and error rate performance of the ordered BLAST with more than 2 transmit antennas is evaluated for i.i.d. Rayleigh fading channels. A number of lower and upper bounds on the 1st step outage probability at any SNR are derived, which are further used to obtain accurate approximations to average block and total error rates. For m Tx antennas, the effect of the optimal ordering at the first step is an m-fold SNR gain. As m increases to infinity, the BLER decreases to zero, which is a manifestation of the space-time autocoding effect in the V-BLAST. While the sub-optimal ordering (based on the before-projection SNR) suffers a few dB SNR penalty compared to the optimal one, it has a lower computational complexity and a 3 dB SNR gain compared to the unordered V-BLAST and can be an attractive solution for low-complexity/low-energy systems. Uncoded D-BLAST exhibits the same outage and error rate performance as that of the V-BLAST. An SNR penalty of the linear receiver interfaces compared to the BLAST is also evaluated.
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