摘要
针对应用于军事通信的短波差分跳频系统中存在敌意多音干扰的问题,建立了系统的多音干扰模型,采用一种联合-切尔诺夫限的方法,从理论上导出了该系统(无编码)在加性高斯白噪声信道和瑞利衰落信道条件下抗多音干扰的比特误码率性能上界;并采用RS信道编码方法,对无编码系统在瑞利衰落信道下误码率为10-3时出现的差错平板进行了改善.数值结果表明编码后的系统较无编码系统能获得约7 dB的性能增益,有效提高了抗多音干扰的能力.
Because the shortwave differential frequency hopping （DFH） system used in military com- munications will be exposed to hostile multitone jamming inevitably, the jamming model for DFH system is proposed. The performances of DFH system in both additive white Gaussian noise channel and Rayleigh fading channel in the presence of multitone jamming are analyzed by means of the Union-Chernoff bounding technique, and the bit error probability upper bounds are derived. The RS channel encoding technique is also employed in the system aiming at the error floor problem in Rayleigh fading channel when the bit error probability is 10^-3. Numerical result shows that the system with coding offers a better performance and a coding gain about 7 dB is achieved in Rayleigh fading channel.
出处
《武汉大学学报（理学版）》
CAS
CSCD
北大核心
2006年第3期380-384,共5页
Journal of Wuhan University:Natural Science Edition
基金
国家自然科学基金资助项目(60372056)
关键词
短波
差分跳频
多音干扰
联合-切尔诺夫限
RS信道编码
shortwave
differential frequency hopping
multitone jamming
Union-Chernoff bounds
RS channel encoding
