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本文讨论在信号各频率振幅受到的衰减不一致并存在有色加性高斯噪声(IGDF-ACGN)信道条件下,FSK信号的最佳相干解调问题。基于矢量表示系统模型的方法,导出了最佳解调器的结构。从理论分析和计算机模拟实验结果都证明了所导得的最佳解调器,不仅在IGDF-ACGN信道条件下是最佳的,而且在加性高斯白噪声(AWGN)信道条件下也是最佳的。文中还导出了相应的误码率公式,给出了误码率数值计算和计算机模拟曲线。
This paper discusses the optimal coherent demodulation of FSK signals under the condition of inconsistent attenuation of each frequency amplitude and the presence of colored additive Gaussian noise (IGDF-ACGN) channels. Based on the vector representation system model, the structure of the best demodulator is derived. From the theoretical analysis and computer simulation results, it is proved that the best demodulator obtained is not only the best under the condition of IGDF-ACGN channel but also the best under additive white Gaussian noise (AWGN) channel condition of. The paper also derived the corresponding error rate formula, given the numerical error rate and computer simulation curve.