Title :
Design of a spread spectrum communication system based on DSP
Author :
He, Huang ; Yan, Liang ; Chunhui, Zhao ; Quan, Pan
Author_Institution :
Inst. of Control & Inf., Northwestern Polytech. Univ., Xi´´an, China
Abstract :
Direct sequence spread spectrum technology is applied widely in wireless communication because of its merits, such as anti-interference ability, good concealment, and being easy to realize Code Division Multiple Access. A Direct sequence spread spectrum communication system based on DSP is designed in the paper, including baseband processor, intermediate frequency modulator/demodulator, local oscillator, up/down converter, keyboard, LCD monitor and DSP controller, etc. The experiment results of transmission shows that the direct sequence spread spectrum system designed can obtain spectrum after IF modulation with 40dBm peak level and 20MHz bandwidth in 4dBm level to meets system requirements. And it can realize effective data transmission and anti-interference communication with advantages of higher data transmission rate and wider spectrum range than the traditional circuits.
Keywords :
code division multiple access; digital signal processing chips; spread spectrum communication; DSP controller; IF modulation; LCD monitor; anti interference communication; bandwidth 20 MHz; baseband processor; code division multiple access; data transmission; direct sequence spread spectrum communication system; intermediate frequency modulator-demodulator; keyboard; local oscillator; up-down converter; wireless communication; Baseband; Demodulation; Digital signal processing; Frequency conversion; Local oscillators; Spread spectrum communication; baseband; intermediate frequency; spread spectrum communication; wireless communication;
Conference_Titel :
Cyber Technology in Automation, Control, and Intelligent Systems (CYBER), 2011 IEEE International Conference on
Conference_Location :
Kunming
Print_ISBN :
978-1-61284-910-2
DOI :
10.1109/CYBER.2011.6011755