摘要
扩跳频通信技术以其良好的抗干扰能力广泛地应用于现代军事与民用通信中,但其频谱效率不够高。因此本文给出了一种信息驱动扩跳频(MD-DS/FH)通信系统模型,即在发射机中的跳频图案不再由传统的跳频码发生器驱动,而由所传输的部分信息数据来代替,并且接收机釆用包络检测器对载波频率进行盲检测。本文推导了AWGN与Rayleigh衰落信道下系统的误比特率公式,给出了闭合表达式,并通过仿真验证了理论推导的正确性。理论分析与仿真结果表明,所给通信系统在提高扩跳频通信系统频谱效率的同时,也提高了系统的误比特率和抗阻塞噪声干扰性能。
Direct Sequence / Frequency Hopping（ DS / FH） spread spectrum technology which has excellent performance on anti-interference is widely used in modern military and civil communication systems. In order to solve the spectral efficiency problem of DS / FH spread spectrum signals,an innovative Message-Driven Direct Sequence / Frequency Hopping（ MD-DS /FH） spread spectrum communication system is proposed in this paper. At the transmitter of MD-DS / FH spread spectrum communication system,frequency hopping pattern is driven by part of information rather than by a pre-determined pseudonoise（ PN） binary-valued sequence as in conventional DS/FH spread spectrum communication system. And the envelope detector is used to detect frequency at the receiver. In this paper,the closed-form expressions of Bit Error Rate（ BER） performance of MD-DS / FH signals under AWGN and Rayleigh fading channels are derived and validated by computer simulations. The Results of theoretical analysis and simulation verification demonstrate that the proposed communication system improves the spectral efficiency and BER and anti-barrage noise jamming performance of DS / FH communication system.
出处
《信号处理》
CSCD
北大核心
2015年第5期514-520,共7页
Journal of Signal Processing
基金
国家自然科学基金(61201126)
新世纪优秀人才支持计划(NCET-11-0058)
四川省青年科技基金(2012JQ0020)
省部级项目(4010103020201-2)资助
关键词
扩跳频
信息驱动
频谱效率
误比特率
direct sequence/frequency hopping spread spectrum
message-driven
spectral efficiency
bit error rate
