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The Design of Signal Source of Fast Hopping-frequency Communication Based on DDS & DSP

LU Qingqi

Abstract

DDS has the merit of high resolution and quick conversion rate.In the design of frequency-hopping supply oscillator of radar and communication system,the DDS technology has the superiority that other frequency synthetic methods is not to be compared with it.Using DSP chip for controlling DDS chip and realizing fast hopping-frequency is characterized by simple,convenient and low cost and can generate hopping-frequency signal under 200MHz.This paper introduces the structure and characteristics of DDS chip AD9951 as well as how to use DSP for controlling chip AD9951 to realize frequency-hopping supply oscillator.

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Key concepts: Frequency-hopping spread spectrum, Chip, Electronic engineering, Digital signal processing, Computer science, Radar, SIGNAL (programming language), Electrical engineering