论文部分内容阅读
针对软件无线电(SDR)技术中的多频段信号带通均匀采样技术,提出了一种能够高效、准确地求解最小采样频率的方法。该方法从理论上可能的最小采样频率出发,根据采样后频谱不发生混叠的3种约束条件来确定可变的频率步长,搜索可用的最小频率。在求解过程中同时考虑到采样后频谱之间的保护带宽。具体的工程算例表明采用该方法能够快速准确地计算出最小采样频率。与其他方法相比,该方法计算复杂度较低,能够避免频谱倒置的情况,并且可以兼顾频谱间的保护间隔。
Aiming at the multi-band signal band-pass uniform sampling technology in software-defined radio (SDR), a method to solve the minimum sampling frequency efficiently and accurately is proposed. Based on the theoretically possible minimum sampling frequency, this method determines the variable frequency step size according to the three kinds of constraints that the spectrum does not aliased after sampling, and searches for the minimum available frequency. In the process of taking into account the sampling of the spectrum after the protection of the bandwidth. Specific engineering examples show that this method can quickly and accurately calculate the minimum sampling frequency. Compared with other methods, this method can calculate the complexity less and can avoid the situation of spectrum inversion, and can take into account the guard interval between spectra.