| 一种低运算量的基于DDC的GMSK解调方案 |
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| 引用本文： | 项加林,裴昌幸. 一种低运算量的基于DDC的GMSK解调方案[J]. 现代电子技术, 2007, 30(21): 1-3,8 |
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| 作者姓名： | 项加林 裴昌幸 |
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| 作者单位： | 西安电子科技大学,ISN国家重点实验室,陕西,西安,710071 |
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| 摘 要： | 在分析GMSK常用解调方案的基础上,提出了一种基于数字下变频器件(DDC)输出相位的差分负反馈解调方案,并给出其与常用解调方案的性能仿真分析和比较。分析结果表明,该方案在保证DDC晶振稳定度的条件下性能良好。同时该方案只需要在最佳抽判时刻进行运算,大大减小了运算量,降低了对处理器的速率要求的同时也降低了功耗,特别适合于便携式跳频通信系统。
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| 关 键 词： | 高斯最小移频键控 差分解调 数字下变频 判决反馈 |
| 文章编号： | 1004-373X（2007）21-001-03 |
| 收稿时间： | 2007-07-16 |
| 修稿时间： | 2007-07-16 |
Research of GMSK Demodulation Scheme Based on DDC with Low Computational Load |
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| XIANG Jialin,PEI Changxing. Research of GMSK Demodulation Scheme Based on DDC with Low Computational Load[J]. Modern Electronic Technique, 2007, 30(21): 1-3,8 |
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| Authors: | XIANG Jialin PEI Changxing |
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| Abstract: | By analyzing some commonly used GSMK demodulation approaches,we bring forward a differential detection scheme of GMSK system using decision feedback,which is based on the output phase of Digital Down Converter(DDC).Not only the complexity has been reduced,but also the performance has been improved evidently in the condition of using a stable oscillator.This new method is especially useful for portable frequency hopping communication terminal. |
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| Keywords: | GMSK differential detection DDC decision feedback |
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