恒包络信号识别与快速突发捕获

为了迅速判断恒包络信号的起始点,详细推导了信号平坦度的计算公式,将信号平坦度概念引入到信号捕获和端点检测领域,在快衰落信道下通过计算噪声和信号平坦度不同,快速区分噪声和恒包络信号;并利用搜索窗快速定位信号起始点位置。经过试验表明在信噪比不低于5dB条件下,该参数能够迅速捕获恒包络信号,并能准确得判定信号的起始点位置,该方法适用在实时性要求比较高的领域。

Constant-envelope Signal Recognition and Rapid Burst Capture

In order to rapidly determine the starting point of constant-envelope signals, the calculation formula of signal flatness is deduced in detail, and the concept of the flatness introduced into signal capture and endpoint detection area. Under fast fading channels and by calculating the difference of noise and signal flatness, rapid distinction between noise and constant-envelope signals is realized, and the search window is used to quickly position start point of the signals. The experiment shows that, in less than 5dB SNR conditions, this parameter could quickly capture the constant-envelope signals, and accurately determine the starting point of the signals. This method is applicable to the fields with high real-time requirement.