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提出了一种基于确定性正弦波叠加模型的多径衰落信道实现方法。该方法以信道自相关函数的均方误差最小来确定模型参数,对多普勒频率进行离散化,并给出了定点实现的位宽选择方案,设计了基于CORDIC算法的多径衰落信道模拟器。实验结果表明,所提出的信道模拟器资源消耗低,实时性好,信道参数配置灵活,其产生的随机过程的分布函数和自相关函数特性接近于参考系统模型,适合于实验室中无线基带系统的硬件测试和验证。
A method of multipath fading channel based on deterministic sinusoidal superposition model is proposed. In this method, the model parameters are determined by minimizing the mean square error of the channel autocorrelation function, and the Doppler frequency is discretized. Finally, a bit wide selection scheme of fixed-point implementation is given and a multi-path fading channel simulator based on CORDIC algorithm is designed . Experimental results show that the proposed channel simulator has the advantages of low resource consumption, good real-time performance and flexible channel parameter configuration. The distribution function and the autocorrelation function of the generated random process are close to the reference system model, which is suitable for the wireless base band system Hardware testing and verification. ?