| 引用本文: | 黎海涛,李佳宇,方正.同时收发认知抗干扰系统的改进能量检测算法.[J].国防科技大学学报,2017,39(6):165-169.[点击复制] |
| LI Haitao,LI Jiayu,FANG Zheng.Improved energy detection scheme of cognitive anti-jamming system based on simultaneous transmitting and receiving[J].Journal of National University of Defense Technology,2017,39(6):165-169[点击复制] |
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| 同时收发认知抗干扰系统的改进能量检测算法 |
| 黎海涛1, 李佳宇1, 方正2 |
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(1. 北京工业大学 信息学部， 北京 100124;2. 上海交通大学 电子信息和电气工程学院， 上海 200240)
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| 摘要: |
| 为增强复杂电磁环境中同时收发认知抗干扰通信系统的性能，研究了基于该系统的改进能量检测算法，推导出瑞利衰落信道中系统的检测概率、虚警概率及中断概率的理论表达式。该改进方法思想是将自干扰信道容量与接收机所需传输速率进行比较，通过比较结果确定能量检测门限值。仿真结果表明，改进能量检测算法能够有效地降低自干扰信号对同时收发认知抗干扰接收机的不利影响，提升系统的中断性能。 |
| 关键词: 认知抗干扰 同时收发 自干扰 能量检测 中断概率 |
| DOI：10.11887/j.cn.201706024 |
| 投稿日期：2016-06-22 |
| 基金项目:航空电子系统综合技术重点实验室和航空科学基金联合资助项目（2013ZC15003） |
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| Improved energy detection scheme of cognitive anti-jamming system based on simultaneous transmitting and receiving |
| LI Haitao1, LI Jiayu1, FANG Zheng2 |
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(1. Faculty of Information Technology, Beijing University of Technology, Beijing 100124, China;2. School of Electronic, Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)
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| Abstract: |
| In order to enhance the anti-jamming operational capability of cognitive anti jamming system based on simultaneous transmitting and receiving in the complex electromagnetic environment, an improved energy detection scheme based on the system was studied and the closed expressions of detection probability, false probability and outage probability of the system under Rayleigh fading channels were derived. The scheme decides the detection threshold by obtaining the result of comparison between the self interference channel capacity and the required transmission speed for receiver. Simulation results show that the effect of receiver impacted by self interference can be reduced and the outage performance of the system can also be improved by the proposed detection scheme. |
| Keywords: cognitive anti-jamming simultaneous transmitting and receiving self-interference energy detection outage probability |
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