通信现场对跳频系统的中断概率和通信容量影响  

Effect on the outage probability and channel capacity of frequency hopping system in communication field

作　　者：刘广凯[1] 全厚德[1] 崔佩璋[1] 姚少林 

机构地区：[1]军械工程学院信息工程系,河北石家庄050003 [2]电子信息系统复杂电磁环境效应国家重点实验室,河南洛阳471000

出　　处：《系统工程与电子技术》2016年第11期2630-2637,共8页Systems Engineering and Electronics

基　　金：国家自然科学基金(61001087)资助课题

摘　　要：通过测试典型跳频电台的发射频谱,以接收机灵敏度原则确定了发射频谱k级旁瓣干扰模型,在考虑跳频系统通信频率、可用频点数、系统用户数、信道参数和固定干扰等因素的情况下,提出了跳频系统的"通信现场"概念;通过分析接收信干噪比(signal to interference and noise ratio,SINR)的分布函数,推导得出跳频系统在通信现场中的中断概率公式;从干扰信号的信息熵角度出发,应用熵功率不等式,推导得出跳频系统在通信现场中的通信容量公式。针对某典型跳频电台,通过分析其发射频谱的各级旁瓣能量,得到了能够影响接收的3级旁瓣干扰模型,以此为仿真输入参量,评估电台在通信现场中的中断概率和通信容量,仿真结果验证了理论推导的正确性。On the principle of the receiver＇s sensitivity, the model of the k level adjacent-channel interference is determined through the test of emitting spectrum of a typical radio. In consideration of the communication frequency, the available frequency points, station number, parameters of channel and fixed interference, the concept of ＂communication field＂ is proposed. Through the analysis of the distribution function of the signal to interference and noise ratio （SINR） on the receiving end, the formula of the outage probability is derived of the FH system under the communication field conditions. From the point of view of information entropy of the signal to interference, and using the entropy power inequality the formula of communication capacity is derived of the FH system under communication field conditions. Through the analysis of the radio＇s emitting spectrum, the model of three adjacent channel interferences is obtained which can effects the receiver＇s sensitivity. Taking the model above as the parameters of simulation, the outage probability and communication capacity are evaluated under the communication field conditions. The simulation results verify the correctness of the theoretical derivation.

关 键 词：跳频系统 性能评估 通信现场 邻频干扰 

分 类 号：TN914.4[电子电信—通信与信息系统] TN924[电子电信—信息与通信工程]