Research on broadband signal spectrum measurement technique based on channelization

摘要

With rapid development of radio technology, communication technology and digital signal processing technology, either carrier frequency or bandwidth of signal spectrum shows rapid growth. Classical measuring tools and methods cannot satisfy measuring requirements of broadband spectrum. Owning researches and breakthroughs in terms of broadband digital intermediate frequency processing technique is the top priority to realize broadband digital signal spectrum measurement. In this paper, channelized Weighed Overlap-add (WOLA) structure and parallel Fast Fourier Transform (FFT) are introduced to cut the input broadband signal into several adjacent narrowband parts, and a new method of pass-band splicing is proposed to combine the pass-band spectrum of the narrowband parts appropriately to get the frequency spectrum of the broadband signals.