关键词: 符号定时同步, 零前缀正交频分复用;能量检测, 多滑动窗

Abstract:

A low-complexity blind symbol-timing synchronization scheme applicable to zero prefix-orthogonal frequency-division multiplexing（ZP-OFDM ）systems is presented. The proposed method is based on zero prefix（ZP） power collection in the ZP-OFDM symbols whose ZP average power distribute regularly in the slide windows. The synchronization schemes in both Gauss channel and multipath Rayleigh fading channel are investigated. Average power distribution of the received signal in multipath Rayleigh fading channel is analysed in detail in order that symbol synchronizes accurately. The relation of synchronization performance and the window’s width is presented. A multi-slide-windows method is designed in order to improve the performance of synchronization. Final computer results also demonstrate the superior performance of the new method in both Gauss channel and multipath Rayleigh fading channel.

Key words: symbol-timing synchronization, zero prefix-orthogonal frequency-division multiplexing, power detection, multi-slide-windows