滑动DFT在宽带数字接收机中的应用

提出了一种基于滑动DFF的数字信道化接收机的结构设计。滑动DFF算法利用前一组DFF结果仅需少量运算即可得到新一组值，因此可以达到较高的运算速度，并节省运算单元，易于硬件实现。在DFF后增加了频域卷积，以减小频谱泄漏的影响。该接收机方案基于时频分析的思路，对各信道输出数据进行聚类处理，以实现对宽带信号的截获，仿真结果验证了该结构的有效性。

Application of Sliding DFT in Digital Wideband Receivers

A new architecture of digital channelized receiver based on sliding DFT is presented. The sliding DFT algorithm requires a constant number of operations to compute a successive DFT output. The algorithm can be easily implemented in hardware with high speed. The window function is used in frequency domain, so as to reduce the frequency leakage. A clustering is performed for the data from all of the channels, in order to intercept wideband signals. Simulation results show the validity of the proposed architecture.