压扩变换在OFDM误比特率控制的应用

Two piecewise-linear companding transform for lower BER of OFDM signals

OFDM传输的固有缺陷是当具有大峰值的OFDM信号进入发射端高功率放大器饱和区时,信号产生失真造成系统误比特率BER性能的下降.采用二段型压扩变换对信号幅度进行处理,将大峰值信号压缩在设定的范围之内.同时,放大小幅度信号,通过压扩变换的纯量系数与增量系数之间约束关系调整,在保证抑制PAPR的条件下,有效的减小OFDM信号的误比特率BER,从而提高OFDM信号的传输性能.

This paper picks up two piecewise-linear companding transform on the signalprocessing,which can both enlarge small amplitude and reduce big peak of OFDM signals by means of constraint adjustment of scalar coefficient and the shift coefficient.It can raise the performance of OFDM signals by reducing the BER of OFDM on the condition of controlling PAPR.