Abstract: A PN (Pseudo Noise) based Channel Estimation (CE) algorithm using circular correlation is proposed, and is implemented in Single Carrier Frequency Domain Equalization (SC-FDE) system. The new CE algorithm is compared to typical frequency-domain algorithms, and it is found that new algorithm has lowest complexity and acceptable performance. A no-guard-interval PNA-SC-FDE (PN Assisted SC-FDE) system is studied and a simpler receiving procedure for interference-canceling based receiver is proposed. Simulation shows that the performance of receiver with interference-canceling and new CE algorithm can approach the performance of receiver with perfect CSI (Channel State Information).

Key words: channel estimation, PN sequence, single carrier frequency domain equalization (SC-FDE)

摘要： 提出了一种基于伪噪声（PN：Pseudo Noise）序列循环相关的信道估计算法，并将之应用于单载波频域均衡系统中。将新信道估计算法与2种典型的频域信道估计算法进行对比研究发现：新算法可更好的兼顾性能与计算复杂度。将新算法用于SC-FDE系统时，研究了基于干扰消除的接收处理流程，并提出了发送的所有PN导频序列都相同时的简化接收处理步骤。仿真表明：干扰消除流程和新的信道估计算法可以使系统性能接近信道完全已知时的系统性能。

关键词: 信道估计, PN序列, 单载波频域均衡