【摘要】 针对固定波形时间保护间隔OFDM系统信号构成的特点,本文提出了一种利用系统中周期出现的两种伪随机序列(PN和pn)相互配合以完成信道估计和跟踪的算法。理论分析和计算机仿真结果表明,在相邻两个OFDM符号的信道特性变化较小的工作环境中,本算法能够很好的对信道状态信息(CSI)进行估计和跟踪,实现OFDM系统的信道均衡。更多还原

【Abstract】 In this paper, according to the structure of signal in OFDM System with fixed waveform Time Guard Interval(TGI), we proposed a algorithm, based on two Pseudo-Noise (PN) sequences, which aims to carrying out channelestimation and tracking. It has been shown, by theoretical analysis and computer simulation, that this algorithm is effective, whenthe characters of channel change slowly between two adjacent OFDM symbols.更多还原