Cramer-Rao Bounds of SNR Estimation for BPSK and QPSK Signals over SIMO Channels

摘要：

In this paper, we derive Cramer-Rao lower bounds for the estimation of signal-to-noise ratio of BPSK and QPSK modulated signals over SIMO channels, when multiple antenna elements are deployed to receive the desired signaL The lower bounds are derived for non-data aided estimation where the transmitted symbols are unknown at the receiver, and compared to those for data-aided estimations (known symbols at the receiver). It is shown that there is a significant difTerence between the bounds for non-data-aided and data aided estimations at low SNR for only one antenna, but become smaller as the antenna number grows. It is assured for us to achieve a substantial performance improvement due to the optimal usage of the mutual information between the branches.

关键词： Cramer-Rao bound SNR estimation Phase-shift keying SIMO Channels

作者: Shen Caiyao Yang Ke Yu Hongyi Zhang Tianzhong

作者单位: Zhengzhou Information Science and Technology Institute,Zhengzhou 450002 China

会议类型: 国际会议

会议名称: 2010 2nd International Conference on Signal Processing System(2010年信号处理系统国际会议 ICSPS 2010)

会议地点: 大连

会议语种:英文

页码: 1487-1490

在线出版日期: 2010-07-05（万方平台首次上网日期，不代表论文的发表时间）