MULTI-CHANNEL DOWN-CONVERTER AND MULTI-CHANNEL DOWN-CONVERTING METHOD FOR GENERATING NARROWBAND CHANNEL USING FAST FOURIER TRANSFORM

摘要

PURPOSE: A multi-channel down-converter and a multi-channel down-converting method for generating a narrowband channel using fast Fourier transform are provided to reduce hardware complexity of the multi-channel down-converter or reduce an operation amount when realizing the multi-channel down-converter by a DSP(Digital Signal Processor). CONSTITUTION: A buffer(110) converts a broadband signal of a time domain into a data vector with a fixed length. A preprocessor(120) pre-processes the data vector saved in the buffer. An FFT(Fast Fourier Transform) processing unit(130) converts the pre-processed data vector into frequency domain data. A baseband processor(140) adds a frequency value in which a narrowband channel exists in the frequency domain data and converts the added value into a baseband.