Channelized broadband signal spectrum analysis based on weighted overlap-add structure

The digital channelization technology has been applied in many electronic areas, and the real-timebroadbandspectrumanalysis has been the research hotspot in the area ofsignal processing. This paper introduces the channelizedbroadband signalspectrumanalysis method. Based on the weighted overlap-add (WOLA) structure, this method divides the inputbroadband signal into several sub-bands or channels, and then downconverts and decimates the sub-band signals to obtain the baseband signals with a low sampling rate. Thespectrumanalysis results of the inputbroadband signal are achieved by conducting further decimation, fastFourier transform andspectrum splicing to the baseband signals. The Matlab simulation results verify the correctness of the WOLA structure, and finally, an experimental platform is designed in detail to verify the practicability of thisbroadbandspectrumanalysis method.

Source: Review of Scientific Instruments - October 25, 2016 Category: Physics Authors: Lianping Guo, Jun Jiang, Feng Tan, Huiqing Pan, Peng Zhang, Hao Zeng and Lihong Bai Source Type: research