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引用本文：

焦传海,王可人,王懋,等.认知FrFT域通信系统及其抗干扰性能分析[J].电讯技术，2011，51（1）： - . [点击复制]
JIAO Chuan-hai,WANG Ke-ren,WANG Mao,et al.Cognitive FrFT Domain Communication System and its Anti-jamming Performance Analysis[J].，2011，51（1）： - . [点击复制]

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认知FrFT域通信系统及其抗干扰性能分析
焦传海,王可人,王懋,冯辉
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(解放军电子工程学院，合肥 230037)

摘要:

为了增强无线通信系统的抗干扰能力，设计了一种认知FrFT(分数傅里叶变换)域通信系统（ CFrFTDCS ），在变换域通信系统中采用分数傅里叶变换，并与认知无线电技术结合，给出了系统的结构框图和工作原理，分析了系统的抗干扰性能。计算机仿真结果表明，CFrFTDCS具有较强的抗干扰能力，针对单音干扰、窄带干扰和Chirp干扰，CFrFTDCS的平均误码率性能比直接序列扩频（DSSS）通信系统分别改善了约15.70 dB、13.29 dB和13.79 dB，比传统的变换域通信系统（TDCS）分别改善了约0.18 dB、0.23 dB和3.63 dB。

关键词: 认知无线电变换域通信系统分数傅里叶变换抗干扰

DOI：

基金项目:解放军电子工程学院博士创新基金资助项目

Cognitive FrFT Domain Communication System and its Anti-jamming Performance Analysis

JIAO Chuan-hai,WANG Ke-ren,WANG Mao,FENG Hui

(PLA Electronic Engineering Institute, Hefei 230037, China)

Abstract:

To enhance the antijamming performance of wireless communication，a c ognitive FrFT domain communication system (CFrFTDCS) is proposed by using fracti onal Fourier transform (FrFT) and cognitive radio (CR) technique in transform do main communication system (TDCS). The block diagrams and operating principles of CFrFTDCS are provided and the antijamming performance is analysed. The comput er simulation results show that the CFrFTDCS has a good antijamming ability. Fo r single tone jammer, narrowband jammer and Chirp jammer, the average bit error performance improvements of CFrFTDCS are about 15.70dB, 13.29dB and 13.79dB to a direct sequence spread spectrum(DSSS) system and about 0.18dB,0.23dB and 3.63dB to a traditional TDCS, respecti vely.

Key words: cognitive radio(CR) transform domain communication system(TDCS) fractional Fou rier transform (FrFT) anti-jamming