A Maximum-Likelihood Based Joint Carrier Frequencies Estimation for MPSK Signal over SIMO Channels

摘要：

In this paper, we investigate the non data aided (NDA) estimation of carrier frequencies and phases for MPSK signals with multiple independent receive antennas, which can be viewed as a generalized single input multiple output (SIMO) system. Signals over generalized SIMO channels, which bear the same information data sequence, may have different carrier frequencies and phases. By exploring the same information buried in the signals between different receive antennas, the performance of NDA estimation of signal parameters could be improved. First, a blind joint carrier frequencies and phases estimator for MPSK signal over SIMO channels is proposed based on maximum-likelihood (ML) principle. Then a particle swarm optimization (PSO) algorithm is used to search the high-dimensional problem space and find the global maximum of the ML function. Finally, simulations verify the benefits of using multiple independent receive antennas in NDA parameters estimation, which indicate that the proposed estimator in SIMO channels improves the performance of carrier frequencies and phases estimation especially at low SNR levels and has a relatively lower SNR threshold than estimators using only one receive antenna.

关键词： Antenna arraying Single input multiple output Carrier frequency estimation MPSK signal Particle swarm optimization

作者: Yang Ke Li Ou Yu Hongyi

作者单位: Department of Communication Engineering Zhengzhou Information Science and Technology Institute Zhengzhou, P.R.China

会议类型: 国际会议

会议名称: 2010 IEEE 10th International Conference on Signal Processing(第十届信号处理国际会议 ICSP 2010)

会议地点: 北京

会议语种:英文

页码: 1620-1623

在线出版日期: 2010-08-24（万方平台首次上网日期，不代表论文的发表时间）