超高速跳频通信系统的实现及抗干扰性能
doi: 10.3724/SP.J.1146.2006.00172
The Architecture and Anti-jamming Test of Ultra-Fast Frequency HopPlatform
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摘要: 跳频通信是军事通信领域中的一种重要的抗干扰手段，该文对超高速跳频通信系统实验平台的实现及其抗干扰性能作了介绍。该实验平台工作在VHF/UHF频段，跳频带宽51.2MHz，跳频速率为每秒十万跳，数据传输速率最高可达96kbps，在工作频点被干扰60％情况下，系统仍然可以保持通信，具有极强的抗截获能力和抗干扰能力。实验台的构成遵循了软件定义无线电思想，采用了数字直接频率合成器来实现跳频信号的调制和解调。利用超外差原理以及高精度模数转换，各种信号处理算法及工作参数均可在软件中调整。最后，文章分析了超高速跳频通信体制带来的抗干扰性能，并给出实验结果。Abstract: Fast Frequency Hopping (FFH) communications is an important technology of anti-jamming in military applications. In this paper, anti-jamming performance and implementation of Ultra-Fast Frequency Hopping (UFFH) test-bed are described. The test-bed capable of transmitting data at 96kbps with hopping rates of up to 100khops/s operates in the VHF/UHF band and keeps capability of communication under the condition in which the 60% of system working spectrum is stained. Based on Software Defined Radio (SDR) technology, the architecture uses a Direct Digital frequency Synthesizer (DDS) to implement demodulation and modulation of Frequency Hopping (FH) signal. Furthermore, different arithmetic of digital signal processing and parameters could be software configured because of the high performance Analog-to-Digital Converter (ADC) and the super-heterodyne architecture. Finally, it is showed by the result of measure and simulation that UFFH test-bed has a robust anti-jamming performance.
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