基于DHT和PTS的光OFDM系统PAPR抑制算法

PAPR reduction algorithm for optical OFDM systems based on discrete hartley transform and partial transmit sequences

提出了一种基于离散哈特利变换(DHT)和部分传送序列(PTS)的PAPR抑制算法。在每个子块中,通过利用快速哈特利逆变换(IFHT)代替传统的快速傅里叶逆变换(IFFT),并结合非对称限幅技术,对子载波信号进行调制。该方法 PAPR抑制效果好,且不需要Hermitian对称,运算复杂度低。

In order to reduce the PAPR, Partial Transmit Sequences （PTS） technique based on discrete Hartley transform is proposed in this paper. The conventional inverse fast Fourier transform （IFFT） is replaced with the inverse fast Hartley transform （IFHT） in each subbolck to make real baseband signal. And combined with the asymmetrically clipping technique, the positive subcarrier signals are achieved in optical OFDM systems. Simulation results show that this algorithm can not only reduce the PAPR, but also have very low computa- tional complexity without Hermitian symmetry.