摘要
在通信系统,信号的同步很重要,一旦信号不能严格的同步,轻则误码率升高,重则系统瘫痪。通信技术发展,单路信号源已经不能满足要求,有必要研究基于多片DDS产生任意相位差信号源。设计以凌阳单片机SPCE061A作为控制核心,精确控制两片AD9850/AD9851 DDS芯片产生两路任意相位差的输出,成功实现两片DDS芯片合成器正交相位同步,完成一种特殊信号源设计。
Synchronizing signal is very important in communication system. Once signal can＇t be synchronized rigidly, bit error rate may rise, or even system breaks down. Single channel source can no longer meet the development of communication technology and it is necessary to study coherent signal source with arbitrary phase difference based on multi - DSP. Adopting Sunplus SPCE061A as control core in the design,which accurately controls two chips of DSP （AD9850 and AD9851） to generate two - way signal source with arbitrary phase difference, and successfully implements a design of special signal source, which keeps phase quadrature synchronization with dual - DSP synthesizer.
出处
《现代电子技术》
2009年第15期38-40,44,共4页
Modern Electronics Technique
基金
广西教育科学"十一五"规划课题"电子实验教学改革的研究与实践"(2006年B002)
广西大学科研基金项目
基于FPGA的扩频通信系统软IP核的研究(x071082)
关键词
直接数字频率合成
相位差
脉冲宽度调制
信号源
direct digital frequency synthesis
phase difference
pulse width modulation
signal source
