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文中讨论了数字化超宽带接收机基于能量检测的非相干算法和工作原理。使用卡方分布推导了OOK调制方式下超宽带信号的概率密度的表达式,并分析了取样率对系统特性的影响,给出了不同取样率下的误码特性曲线,同时分析了信噪比对系统误码率的影响,得出了在给定误码率要求的情况下,采用低取样率的数字接收机可以满足系统要求,从而降低了整个数字接收机系统的成本和复杂度。
This paper discusses the incoherent algorithm and working principle of digital UWB receiver based on energy detection. Using the chi-squared distribution, we derive the expression of the probability density of the UWB signal under the OOK modulation mode. The influence of the sampling rate on the system characteristics is analyzed. The error curves of the signals under different sampling rates are given. The impact of the system bit error rate, resulting in the given bit error rate requirements, the use of low sampling rate digital receiver can meet the system requirements, thus reducing the cost and complexity of the entire digital receiver system.