冲激相消法降低OFDM信号PAR

Impulse Cancellation Method to Reduce PAR of OFDM Signal

为了降低OFDM信号的峰平比,提出了一种适应于任意子载波数目OFDM信号PAR降低的冲激脉冲峰值相消的方法。分析了采用此方法的OFDM信号峰平比的概率分布和误码率性能,对冲激脉冲相消法中不同限幅因子和冲激比因子对OFDM信号的峰平比降低的程度进行了仿真。仿真结果表明,当限幅因子一定时,冲激比因子为0.3时,冲激脉冲相消法可以有效地改善OFDM信号的高峰平比特性。

A novel impulse cancellation method is proposed to reduce the PAR of OFDM signal of any number of carriers.The probability distribution and bit error rate performance of PAR of OFDM signal are analyzed when adopt this method.And the degrees of reduction of PAR of OFDM signal with different limiter factor and impulse factor are simulated.The simulation results show that the impulse cancellation method can improve the characteristic of high PAR of OFDM signal.