中文摘要：

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。

英文摘要：

This paper discusses the incoherent algorithm and work mechanism of Digital UWB receiver based on energy detection, and deduces the formula of UWB signal probability density in OOK modulation. It also analyzes the influence of sampling rates on system characteristics, gives BER curves corresponding to different sampling rates, and discusses of the influence of BER with different SNRs. The receiver adopts a low sampling rate can satisfy the BER requirements, and the cost and complexity of the system thus be reduced.