OFDM系统中基于PN序列的迭代相关检测信道估计

Channel Estimation with PN-based Turbo Correlation Detection in OFDM System

提出了一种基于PN序列进行时域迭代相关检测的信道估计算法,在典型信道下,采用该算法后系统的误码率性能优于传统的频域导频系统。PN序列还可以用于多用户检测、频偏估计和定时同步,因而OFDM系统中使用PN序列的帧结构可以减少系统资源开销,提高频谱利用率。

This paper proposes a channel estimation algorithm with PN-based turbo correlation detection in time domain. In typical channels, the algorithm has higher performance than that with pilot in frequency domain. Moreover PN sequence can also be used in multi-user detection, frequency offset estimation and timing correction. Therefore the frame structure with PN sequence in OFDM system can reduce system overhead and improve spectrum efficiency.