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

Volume

3

fYear

2010

fDate

20-22 Aug. 2010

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Advanced Computer Theory and Engineering (ICACTE), 2010 3rd International Conference on

Conference_Location

Chengdu

ISSN

2154-7491

Print_ISBN

978-1-4244-6539-2

Type

conf

DOI

10.1109/ICACTE.2010.5579576

Filename

5579576