FFT algorithm is the popular software design for spectrum analyzer, but doesn’t work well for parallel hardware system due to complex calculation and huge memory requirement. Observing the key components of a spectrum analyzer are the intensities for respective frequencies, we propose a Goertzel algorithm to directly extract the intensity factors for respective frequency components in the input signal. Goertzel algorithm dispenses with the memory for z-1 and z-2 processing, and only needs two multipliers and three adders for real number calculation. In this paper, we present the spectrum extraction algorithm and implement a spectrum extractor with high speed and low area consumption in a FPGA (Field Programmable Gate Array) chip. It proves the feasibility of implementing a handheld concurrent multi-channel real-time spectrum analysis IP into a low gate counts and low power consumption CPLD (Complex Programmable Logic Device) chip.
FPGA-Based Spectrum Analyzer with High Area Efficiency by Goertzel Algorithm
2008 Congress on Image and Signal Processing ; 1 ; 157-159
2008-05-01
260476 byte
Conference paper
Electronic Resource
English
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