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本文分析了时变信道的最优基信道模型,通过对信道统计相关函数的离散K-L(Karhunen-Loeve)变换得到了多径信道的特征向量基模型,该信道模型可以精确地拟合时变信道的变化,并在中国数字电视地面传输标准(DTTB)系统上使用该方法进行仿真。仿真表明,在高速移动的情况下,该方法仍具有相当好的均衡性能。同时,在SNR较高时,可以得到很好的误码性能。该模型是统计意义上的有限阶数最优信道模型。
In this paper, the optimal channel model of time-varying channel is analyzed. The eigenvector base model of multipath channel is obtained by the discrete KL (Karhunen-Loeve) transform of channel statistical correlation function. The channel model can accurately fit time-varying channel Of the changes, and in the China Digital Television Terrestrial Transmission Standard (DTTB) system using this method for simulation. Simulation shows that the method still has a good balance performance under high-speed moving conditions. At the same time, good SNR performance can be achieved at higher SNRs. The model is a statistical finite-order optimal channel model.