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3μs,满足系统设计要求。实际测试表明该系统可稳定运行。
By making use of the merit of portability of DSP platform, a wireless data transmission platform based on DSP is designed. The design idea, hardware structure of system platform and main program flow of algorithm are described. This system achieves conversion between modulated cartier signal and 550 MHz UHF signal using PLL and mixer, and realizes 2FSK modulation and demodulation algorithm of base band signal based on the prin- ciple of lookup-table and non-coherent demodulation. When DSP works at 160 MHz, the demodulation time for one binary element is 3 ps, which meets the requirements of system. Test shows that the system runs stably.
出处
《电讯技术》
北大核心
2010年第10期48-52,共5页
Telecommunication Engineering
