一种基于新训练序列的正交频分复用(OFDM)接收机设计

A Orthogonal Frequency Division Multiplexing Receiver Design Based on New Training Sequence

为避免严重频率选择性衰落信道产生的问题,在传输之前,每个OFDM信号前面的保护间隔(GI)中插入循环前缀(CP)。论文通过对TS-OFDM使用频域均衡(FDE)进行频率分集增益,设计了一种新型插入训练序列的接收机方案。采用蒙特卡罗数值计算方法计算在频率选择性瑞利衰落信道中的平均误码率,并通过对TS-OFDM信号传输的仿真验证了该方法的性能,误码率和吞吐量性能均得到了提升。

To avoid the problems caused by severe frequency selective fading channels,before transmission,a cyclic prefix（CP）needs to be inserted in the guard interval（GI）before each OFDM signal. In this paper,a new receiver scheme to insert train-ing sequence is designed by performing frequency diversity gain on frequency domain equalization（FDE）of TS-OFDM. The aver-age bit error rate（BER）in frequency selective Rayleigh fading channel is calculated by Monte Carlo numerical method. The perfor-mance of the proposed method is verified by the simulation of TS-OFDM signal transmission. Both BER and throughput performanceare obtained improvement.