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影响线导系统误码率的主要因素是加在解调器输入端的信噪比,从提高接收机性能的角度分析,需要在同样信道噪声的条件下研究信号的最佳接收。本文根据信号检测理论,在最小错误概率准则下,讨论了在给定信号情况下,采用相关检测器对线导通信信号的解调与仿真。结果表明,基于最佳接收原则的相关检测器抗干扰能力强,改善了线导系统误码性能。
The main factor that affects the bit error rate of the line guidance system is the signal-to-noise ratio added to the input of the demodulator. From the point of view of improving receiver performance, it is necessary to study the best signal reception under the same channel noise. Based on the theory of signal detection, this paper discusses the demodulation and simulation of line-to-line communication signals with the correlation detector given the signal under the minimum error probability criterion. The results show that the correlation detector based on the best reception principle has strong anti-interference ability and improves the error performance of the line guidance system.