Title :
Design of composite frequency meter based on DSP
Author :
Dun-fan, Ye ; Xue-mei, Xu ; Zeng Li-wen
Author_Institution :
Fac. of Mech. & Electron. Inf., China Univ. of Geosci. (Wuhan), Wuhan, China
Abstract :
Based on TMS320F2808 DSP chip, this essay introduces a composite frequency signal detection method and proposes a spectrum Sa function proportion table lookup method. Through sampling twice, combined with IQ math technology, as well as revising of appropriate sampling frequency, the experiment executes a high-speed FFT operation based on 2048 point and realizes fast, high-resolution calculation of the frequency and amplitude information of primary and minor signals included in the mixed signal. What´s more, we realize high-precision regeneration of mixed-signal by using the HRPWM function of TMS320F2808 DSP chip and analog switches of CD4053 chip as well as 6-band filter circuit.
Keywords :
digital signal processing chips; fast Fourier transforms; frequency meters; signal detection; signal sampling; table lookup; CD4053 chip; DSP; FFT; HRPWM function; IQ math technology; analog switches; composite frequency meter; sampling frequency; signal detection method; spectrum Sa function; table lookup method; Extraterrestrial measurements; Frequency measurement; Frequency modulation; Pulse width modulation; Signal resolution; Technical Activities Guide - TAG; Wireless communication; DSP; FFT; Frequency Meter; Sample;
Conference_Titel :
Advanced Computer Theory and Engineering (ICACTE), 2010 3rd International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-6539-2
DOI :
10.1109/ICACTE.2010.5579576
