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文中提出一种简单、实用的门限自适应的独特码检测方法。在对判决量统计特性分析的基础上,采用最大似然估计准则估计出等效高斯白噪声方差,由此,可以得到判决门限的估计值。最后给出了该方法基于GM-SK信号的一种降低运算量的实现方案。对文中的门限自适应的独特码检测方法进行了计算机仿真,结果表明,该方法能明显提高独特码的检测概率,从而说明其有效性,而且,该方法实现非常简单,很适合在工程中应用。
In this paper, a simple and practical threshold-adaptive unique code detection method is proposed. Based on the analysis of the statistical characteristics of the verdict, the maximum likelihood estimation criterion is used to estimate the variance of the equivalent Gaussian white noise. From this, the estimated value of the decision threshold can be obtained. Finally, a method to reduce the computational complexity based on GM-SK signal is given. The threshold self-adaptive unique code detection method is simulated by computer. The results show that this method can significantly improve the detection probability of unique code, thus indicating its validity. Moreover, this method is very simple and very suitable for application in engineering .