一种采用FFT前合并接收的OFDM系统

An OFDM System Using PRE-FFT Combination Receive Technique

提出了一种OFDM接收机进行FFT解调前对各天线接收信号合并的方法,并给出了在无线瑞利衰落信道中的系统误码率性能的分析和仿真结果,与单天线接收OFDM系统相比,系统能获得相当的分集增益,而且在增加天线数目的同时还能保持接收机进行FFT运算次数不变,从而等效地降低了接收机硬件实现的复杂度.

An OFDM system using preFFT combination receiving technique is proposed. The analysis and computer simulation results of the system over wireless rayleigh fading channel show that the system performance can be improved a lot. While the number of receiving antenna is increased to two, the number of FFT operation can hold. This implies that in fact equivalent reduction in processing complexity of receiver is obtained.