A Robust Coarse Timing Synchronizer Design for Cooperative Diversity OFDM System
In this paper, a robust coarse symbol timing offset synchronizer design for cooperative diversity OFDM system is proposed. Further, a preamble format suitable for Decode and Forward (DF) cooperative diversity scenario is presented. One half of the proposed preamble for Relay and Source is orthogonal and the other half is independent in time domain due to presence of null portion. This null portion also provides sufficient delay required for DF process. The frame structure and cooperative protocol for Source and Relay is also elaborated in context of deployment of proposed timing algorithm. Furthermore, two low complexity versions for coarse timing metric estimator are also described. The performance of these algorithms is evaluated for orthogonal, independent and proposed preamble using Monte Carlo simulations. The proposed timing algorithm and preamble combination shows better probability of synch detection and timing variance even in a Rayleigh fading channel.
Synchronization Cooperative Diversity OFDM Preamble
Mudassar I. Cheema Shoab A. Khan
College of Electrical and Mechanical Engineering National University of Sciences and Technology Islamabad, Pakistan
国际会议
海口
英文
85-89
2011-02-22（万方平台首次上网日期，不代表论文的发表时间）