基于TDS-OFDM系统的迭代信道估计与均衡方法

Iterative channel estimation and equalization method based on the TDS-OFDM system

以中国地面数字多媒体广播(DTMB)国家标准为背景,提出了一种适用于时域同步正交频分复用(TDS-OFDM)系统的迭代信道估计与均衡方法。首先通过数学推导,对该方法的步骤和细节进行了分析和描述;然后给出了该方法在硬件实验平台上的仿真结果以及实地测试的结果。结果表明,该方法能够有效跟踪各种复杂无线多径信道的变化,并利用信道估计结果对信号进行均衡,在很大程度上消除多径效应带来的不利影响,保证正常接收。

An iterative channel estimation and equalization method was developed for the TDS-OFDM system within the Chinese DTMB standard. The key principles of the method are analyzed with simulations on a hardware platform and field test results given to validate the system performance. The system can effectively track change in complicated wireless multi-path channels, with equalization operation based on the estimation results to minimize the negative effects caused by the multl-path channel environment, which ensures normal signal reception.