短波3G-ALE系统物理层关键技术研究

Research on Key Techniques for Physical Layer of HF 3G-ALE System

3G-ALE系统中的0号突发波形(BW0)用于链路建立,对整个系统起到关键作用。通过对3G-ALE系统同步捕获、解扩、译码等关键技术的研究,提出了一种针对BW0的改进接收方案,该方案融合了正交解扩比特软值提取算法、Rake接收技术、环绕Viterbi译码算法(WAVA)等技术,并仿真了高斯白噪声信道及多径衰落信道下的性能。仿真结果表明,在各种信道条件下,与现有工作相比,在相同的信噪比下改进的接收方案有更高的建连概率。

Burst Waveform 0 （BW0） is used to convey all 3G-ALE （connection management） PDUs,and it plays a key role in the 3G- ALE system. A novel receiving scheme, which combines bit soft-output algorithm, Rake reception and wrap-around Viterbi algorithm （WAVA）, is proposed. The new method achieves higher link-establishment probability than the requirements of MIL-STD-188-141 B.