| 连续相位频移键控信号的频域均衡算法 |
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| 引用本文： | 刘永鑫,赵明,周世东. 连续相位频移键控信号的频域均衡算法[J]. 清华大学学报(自然科学版), 2009, 0(10): 1664-1667 |
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| 作者姓名： | 刘永鑫 赵明 周世东 |
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| 作者单位： | 清华大学,电子工程系,北京,100084;清华大学,电子工程系,北京,100084;清华大学,电子工程系,北京,100084 |
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| 基金项目： | 国家“八六三”高技术项目(2007AA01Z2b6);;国家“九七三”重点基础研究项目(2007CB310608);;新世纪优秀人才支持计划资助 |
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| 摘 要： | 为了解决连续相位频移键控(continuous phase frequency shift keying,CPFSK)信号在长时延扩展信道下的均衡难题,利用单载波频域均衡的思想提出了在最小均方误差准则下最优的CPFSK频域均衡算法,包括线性均衡和非线性的判决反馈均衡。从理论上分析了算法的原理和可实现性,并且以两种CPFSK信号为例,通过数值仿真验证了算法的理论结果。仿真结果表明:该文提出的线性频域均衡算法性能要好于传统的CPFSK信号频域均衡算法,与传统频域均衡算法相比,几乎没有增加计算复杂度;并且利用判决反馈算法逼近了最大似然序列估计的性能。
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| 关 键 词： | 频域均衡 判决反馈均衡 连续相位调制 连续相位频移键控 |
Frequency-domain equalization for continuous phase frequency shift keying |
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| LIU Yongxin,ZHAO Ming,ZHOU Shidong. Frequency-domain equalization for continuous phase frequency shift keying[J]. Journal of Tsinghua University(Science and Technology), 2009, 0(10): 1664-1667 |
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| Authors: | LIU Yongxin ZHAO Ming ZHOU Shidong |
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| Affiliation: | Department of Electronic Engineering;Tsinghua University;Beijing 100084;China |
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| Abstract: | A minimum mean-square error frequency-domain equalization algorithm based on single-carrier frequency-domain equalization for continuous phase frequency shift keying(CPFSK) was developed to improve equalization of the CPFSK signals transmitted over channels having long impulse responses.Simulations for a CPFSK signal with a modulation index h=1/3 show that the linear equalization outperforms conventional frequency-domain equalization with less computational cost and that the decision feedback equalization h... |
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