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| 干涉型光纤水听器PGC解调的DSP实现 | |
| 引用本文： | 袁大岭,李平,张仁和. 干涉型光纤水听器PGC解调的DSP实现[J]. 传感器与微系统, 2005, 24(8): 57-59 |
| 作者姓名： | 袁大岭 李平 张仁和 |
| 作者单位： | 中国科学院,声学研究所,声场声信息国家重点实验室,北京,100080 |
| 摘 要： | 提出了基于数字信号处理器(DSP)系统的相位载波(PGC)解调的软硬件实现。针对PGC解调中混频信号与实际调制信号的频率偏差,在DSP系统实现中采用一路A/D转换器对调制信号进行同步采样,从而克服了频率偏差对解调结果的影响。结合TMS320C6201的CPU结构和片内资源,对算法实现进行了并行优化,实现了系统的实时解调。实验表明:优化后算法的运算时间显著减少,DSP解调信号与参考信号的相关系数达到0.9。 |
| 关 键 词： | 干涉型光纤水听器 相位载波 解调 数字信号处理器 |
| 文章编号： | 1000-9787(2005)08-0057-03 |
| 收稿时间： | 2005-02-20 |
| 修稿时间： | 2005-02-20 |
Implementation of PGC demodulation for interferometric optic fiber hydrophone based on DSP |
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| YUAN Da-ling,LI Ping,ZHANG Ren-he. Implementation of PGC demodulation for interferometric optic fiber hydrophone based on DSP[J]. Transducer and Microsystem Technology, 2005, 24(8): 57-59 | |
| Authors: | YUAN Da-ling LI Ping ZHANG Ren-he |
| Abstract: | A digital implementation of PGC demodulation based on DSP system is demonstrated. To overcome the frequency offset between the mixing signal and modulating signal in PGC demodulation, an additional A/D channel in DSP system is used to sample the modulating signal. To adapt for the real-time application, the algorithm is optimized parallelly based on TMS320C6201 CPU architecture and chip resources. The experiment shows the operation time of optimized algorithm has been greatly reduced and the correlation coefficient between the reference signal and the output processed by DSP is greater than 0.9. |
| Keywords: | interferometric optic fiber hydrophone phase generated carrier(PGC) demodulation digital signal processor(DSP) |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |