变换域处理的信道估计算法在OFDM-PON中的应用

摘要

研究了正交频分复用无源光网络（OFDM-PON）系统中的信道估计算法，提出了在变换域处理的信道估计算法以及通过增加一个较小缓存单元来实施降噪的改进算法。实验结果表明，在相同的导频开销下，改进的变换域处理信道估计算法与已有的信道算法相比有更精确的估计性能。%Channel estimation algorithms for orthogonal frequency division multiplexing passive optical net-work (OFDM-PON) are discussed in this paper. The transform domain processing channel estimation algo-rithm is proposed as well as the improved algorithm with addition cache to implement the noise reduction. Ex-perimental results show that the proposed improved transform domain processing algorithm achieve better performance than other existing algorithms with the same pilot overhead.