| 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 antijamming 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 antijamming performance is analysed. The comput
er
simulation results show that the CFrFTDCS has a good antijamming 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 |
