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在OFDM系统中,实时、准确地得到关于信道的信息,已成为数据检测和信道均衡的关键。文中在基于DFT方法上,提出了一种基于MMSE准则的参数化信道估计方法,利用了信道时域响应的特性,对信道时域响应进行了估计。仿真结果表明,此方法较迭代的DFT方法更快捷,更充分地利用了信道时域响应的特性,在高信噪比时,有更低的均方误差(MSE)。
In OFDM system, real-time, accurate information about the channel has become the key to data detection and channel equalization. In this paper, based on the DFT method, a parameterized channel estimation method based on MMSE criterion is proposed. The channel time-domain response is estimated by using the characteristics of channel time-domain response. The simulation results show that this method is faster and more efficient than the iterative DFT method in utilizing the characteristics of the channel time-domain response and has a lower mean square error (MSE) at high signal-to-noise ratio.