摘要: |
利用DSP平台可移植性好的特点,设计了一种基于DSP与2FSK的无线数据传输平台,
给出了系统的设计思路、平台硬件结构及主要算法程序流程。系统使用PLL和混频器实现了
调制载波信号与550 MHz UHF信号之间的变换,并根据查表法和非相干解调原理,实现了
基带信号的2FSK调制解调算法。当DSP工作在160 MHz频率时,解调一个二进制码元的时
间为3 μs,满足系统设计要求。实际测试表明该系统可稳定运行。 |
关键词: 无线数据传输 数字信号处理器 基带信号 2FSK调制解调 |
DOI: |
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基金项目: |
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Design and Implementation of Wireless Data Transmission Platform Based on DSP |
XU Ling-fei,LIN Hao-dong |
(The Engineering and Technical College,Chengdu University of Technology,Lesh
an 614007,China) |
Abstract: |
By making use of the merit of portability of DSP platform, a wireless data t
ransmission platform based on DSP is designed. The design idea, hardware structu
re of system platform and main program flow of algorithm are described. This sys
t
em achieves conversion between modulated carrier signal and 550 MHz UHF sign
al us
ing PLL and mixer,and realizes 2FSK modulation and demodulation algorithm of ba
se b
a
nd signal based on the principle of lookuptable and noncoherent demodu
la
tion. When DSP works at 160 MHz, the demodulation time for one
binary element is 3 μs, which meets the requirements of system.Test shows t
hat the system
runs stably. |
Key words: wireless data transmission DSP base band signal 2FSK modem |