桂林电子科技大学学报2017，Vol.37Issue(4)：259-264,6.
基于过采样的OFDM-MFSK系统分集方法
A diversity method based on oversampling for OFDM-MFSK system
摘要
Abstract
In order to improve bit error rate(BER)performance of OFDM-MFSK system,a diversity method based on over-sampling is proposed.Firstly the subcarriers of OFDM are divided into several groups at the transmitter,and each group of subcarrier employs MFSK modulation scheme.Then the receiving signals are sampled with a sampling frequency significant-ly higher than Nyquist rate at the receiver.At the end,an equal gain combination(EGC)is carried in frequency domain to accumulate related subcarriers'energy for non-coherent energy detection.Simulation results show that the proposed method can win the diversity gain,the greater the oversampling factor,the better BER performance.Compared with the coherent detection,no channel estimation is needed,and under the high signal-to-noise ratio,it not only has better system perform-ance,but also has strong robustness for the time-varying channel.关键词
非相干检测/OFDM-MFSK/过采样/分集Key words
non-coherent detection/OFDM-MFSK/oversampling/diversity分类
信息技术与安全科学引用本文复制引用
万杰,谢跃雷,郑兆飞,欧阳缮..基于过采样的OFDM-MFSK系统分集方法[J].桂林电子科技大学学报,2017,37(4):259-264,6.基金项目
国家自然科学基金(61461015) （61461015）
广西自然科学基金(2015GXNSFAA139302) （2015GXNSFAA139302）
桂林电子科技大学研究生科研创新项目(2016YJCX75) （2016YJCX75）
