Simplified Iterative Symbol Timing and Carrier Phase Recovery Scheme for LDPC-Coded Systems

摘要：

A simplified ML-Based iterative synchronization scheme is proposed in this paper for LPDC-Coded systems. Symbol timing and carrier phase are estimated in a simple way based on the maximum likelihood theory aided by hard decision obtained from LDPC decoder. The synchronized samples input to the decoder are updated when a new iterative estimation for symbol timing and carrier phase is completed. The synchronized samples are reconstructed by quadratic interpolation which is very simple and can be implemented in parallel. This approach is applied to a LDPC-Coded QPSK system over AWGN channel. Simulation results demonstrate that the performance of the proposed scheme approaches that with the ideal synchronization.

关键词： LDPC codes timing synchronization iterative decoding low complexity

作者: Liu An Luo Wu

作者单位: School of EECS,Peking University,Beijing,P.R.China,100871

会议类型: 国际会议

会议名称: 第二届IEEE无线通讯、网络技术暨移动计算国际会议

会议地点: 武汉

会议语种:英文

在线出版日期: 2006-09-01（万方平台首次上网日期，不代表论文的发表时间）