Anti partial-band noise jamming interleaved hybrid spread spectrum system design and capacity analysis
REN Yinpeng1, NI Zuyao2, KUANG Linling3, WU Sheng3, LU Jianhua1,3
1. Department of Electronic Engineering, Tsinghua University, Beijing 100084, China;
2. Research Institute of Information Technology, Tsinghua University, Beijing 100084, China;
3. Tsinghua Space Center, Tsinghua University, Beijing 100084, China
Abstract：Anti partial-band noise jamming (PBNJ) is improved by an interleaved direct sequence/frequency-hopping (IDS/FH) system based on the traditional direct sequence/frequency-hopping (DS/FH) spread spectrum method. An interleaver crossing multiple hops improves the time-frequency diversity gain. The system capacities with PBNJ are compared to a single-input multiple-output (SIMO) system with additive Gaussian white noise (AWGN) in a fading environment. An optimum IDS/FH receiver is also given. Theoretical analyses indicate that, when the PBNJ occupies 50% of the entire frequency band and the SNR is 10 dB, the IDS/FH capacity is 49% higher than that of DS/FH. Simulations show that the achievable lowest bit error rate of IDS/FH is two orders of magnitude lower than that of DS/FH with 50% PBNJ.
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