同时收发认知抗干扰系统的改进能量检测算法

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。

Improved Energy Detection Scheme of Simultaneous Transmit and Receive Cognitive Anti-jamming Communication System

In order to enhance the anti-jamming operational capability of simultaneous transmit and receive based cognitive anti-jamming system in the complex electromagnetic environment, an improved energy detection scheme based on the system is study and the closed expression of detection probability, false probability and outage probability of the system under Rayleigh fading channels is derived. The scheme decides the detection threshold by obtaining the result of comparison between 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 is also improved.