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部分传输序列技术对OFDM符号峰均功率比有很好的抑制作用,但由于该算法需要进行多次IFFT运算,硬件实现资源开销较大。针对这个问题,提出了一种简化的方案,在计算旋转系数时,利用V次L/2点IFFT变换代替原来的V次L点IFFT变换。这在降低由IFFT变换带来的资源消耗的同时,又很好地将OFDM符号峰均比抑制性能损失控制在很小范围内。最后,简化的PTS方案还在Altera公司的FPGA芯片中实现,相比简化前的PTS技术,可以减少20%左右的资源消耗。
Part of the transmission sequence of the OFDM symbol peak-to-average power ratio has a good inhibitory effect, but because of the algorithm requires multiple IFFT operations, the hardware resource overhead. Aiming at this problem, a simplified scheme is proposed. When calculating the rotation coefficient, V times L / 2-point IFFT transformation is used to replace the original V-point L-point IFFT transformation. This reduces the resource consumption caused by the IFFT transform, and also well controls the OFDM symbol peak-to-peak rejection performance loss to a very small extent. Finally, the simplified PTS solution is also implemented in Altera’s FPGA chips, which can reduce resource consumption by about 20% compared to the pre-simplified PTS technology.