短波宽带信道中噪声与干扰建模  

Modeling of Wideband HF Noise and Interference

作　　者：徐谡钦[1] 徐以涛[1] 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007

出　　处：《通信技术》2013年第5期24-26,共3页Communications Technology

摘　　要：短波通信系统依靠电离层传播,具有通信距离远,灵活性高,抗干扰性强,成本低廉等特点,是一种重要的国防军事通信手段。传统短波通信受电离层特性影响而有效带宽较窄,导致数据传输速率极低。因此,提高信道容量实现高速数据传输的短波宽带通信系统越来越受到重视。短波宽带信道建模是短波宽带通信系统正常发挥性能的关键,对短波宽带通信系统的设计与实际应用具有重要的实际意义。结合现有短波宽带信道的衰落特性模型,介绍了短波宽带信道噪声和干扰模型,并进行了比较和可靠性分析,发现现有模型形式比较单调统一,但和实际测量数据一致,能有效描述短波宽带通信中信道噪声与干扰特性,模型已经比较完善。最后,提出了进一步研究的重点方向。HF communication system, mostly dependent on the ionospheric propagation, now becomes an important means in military communication, for its advantages of far communication-distance, high flexibility, low cost and robust anti-jamming capability. Traditional HF communication system, due to the wicked ionospheric environment, has a very limited bandwidth and supports only the low-rate data transmission. Therefore, the wideband HF communication system with greater channel capacity becomes a hot point in HF communication. Modeling the wideband HF channel is of great significance in the design and practical application of wideband HF communication. Combined with the model of fading characteristic, the modeling of noise and interference in wideband HF communication is described. Meanwhile, comparison and reliability analysis indicate that the existing model of noise and interference in wideband HF communication is monotonously unified in form, but coud fairly describe the features of noise and interference. Finally this paper DroDoses some key points for future research.

关 键 词：短波宽带通信 窄带干扰 脉冲噪声 人为噪声 大气噪声 

分 类 号：TN926.2[电子电信—通信与信息系统]