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| 基于全数字锁相环的MFSK信号盲解调算法* | |
| 引用本文： | 徐健飞,汪芙平,王赞基. 基于全数字锁相环的MFSK信号盲解调算法*[J]. 计算机应用研究, 2011, 28(10): 3852-3854. DOI: 10.3969/j.issn.1001-3695.2011.10.067 |
| 作者姓名： | 徐健飞 汪芙平 王赞基 |
| 作者单位： | 清华大学电机系电力系统国家重点实验室,北京,100084 |
| 基金项目： | 高等学校博士学科点专项科研基金资助项目（20060003032) |
| 摘 要： | 针对非协作通信下MFSK信号解调的问题，提出一种基于全数字锁相环的无须任何先验信息的盲解调算法。该算法首先应用较少的码元提取出码元速率，随后通过对锁相环输出的频率跟踪信号进行处理，实现符号同步、符号门限和进制估计，最后依据前面的估计结果对MFSK信号进行实时解调。该算法实用性强，易于在FPGA中实现。仿真实验表明，该算法具有较好的解调性能，当输入信噪比大于4 dB时，对2FSK、4FSK和8FSK的解调正确率都可以达到95%以上。 |
| 关 键 词： | 非协作通信；多进制数字频率调制；全数字锁相环；盲解调 |
Blind demodulation algorithm for MFSK signal based on all digital phase-locked loop |
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| XU Jian-fei,WANG Fu-ping,WANG Zan-ji. Blind demodulation algorithm for MFSK signal based on all digital phase-locked loop[J]. Application Research of Computers, 2011, 28(10): 3852-3854. DOI: 10.3969/j.issn.1001-3695.2011.10.067 | |
| Authors: | XU Jian-fei WANG Fu-ping WANG Zan-ji |
| Affiliation: | XU Jian-fei,WANG Fu-ping,WANG Zan-ji(State Key Laboratory of Power System,Dept.of Electrical Engineering,Tsinghua University,Beijing 100084,China) |
| Abstract: | To solve the problem of the demodulation of MFSK signal in non-cooperative communication,this paper presented a new blind demodulation algorithm for MFSK signal based on all-digital enhanced phase-lock loop where no apriori information about the signal was needed.Used a few symbols to extract symbol rate at first,and then accomplished clock synchronization,modulation level identification and symbol identification simultaneously based on the frequency tracking signal of the all-digital enhanced phase-lock lo... |
| Keywords: | non-cooperative communication MFSK all-digital enhanced phase-lock loop blind demodulation |
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