一種新的部分頻帶噪聲干擾模型下的FH/MFSK系統(tǒng)性能分析
doi: 10.11999/JEIT140708 cstr: 32379.14.JEIT140708
基金項目:
國家自然科學(xué)基金(61201126)，新世紀(jì)優(yōu)秀人才支持計劃(NCET- 11-0058)，國家部委基金和四川省青年科技基金(2012JQ0020)資助課題
Performance Analysis of FH/MFSK System in the Presence of New Partial-band Noise Jamming Model
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摘要: 部分頻帶噪聲干擾(PBNJ)是一種主要的窄帶干擾，它對通信系統(tǒng)性能的影響十分突出。該文針對FH/ MFSK系統(tǒng)中，傳統(tǒng)的部分頻帶干擾模型的干擾帶寬最小分辨率是一個跳頻子帶帶寬(即MFSK信號的帶寬)，研究了更具有實際價值的新的部分頻帶干擾模型，即將干擾帶寬最小分辨率精確到MFSK信號帶寬的1/M。該文推導(dǎo)了萊斯衰落信道下的誤比特率(BER)公式，給出了其閉合表達式，并通過計算機仿真驗證了理論推導(dǎo)的正確性。理論分析與仿真結(jié)果表明，M,Nh,越小，傳統(tǒng)與新PBNJ模型下FH/MFSK信號的BER性能差異就越大。Abstract: Partial-Band Noise Jamming (PBNJ) is one main type of narrow-band jamming, it has a huge impact on the performance of communication systems. The minimum resolution of jamming bandwidth of the conventional PBNJ model is the Frequency-Hopping (FH) sub-band bandwidth (Multiple Frequency Shift Keying (MFSK) signal bandwidth) in the FH/MFSK system. However, it is not always reasonable, thus a new PBNJ model, whose minimum resolution of jamming bandwidth can accurate to 1/M of the MFSK signal bandwidth is studied. In this paper, the closed-form expressions of Bit Error Rate (BER) performance under the new PBNJ model over Rician fading channel are derived and validated by computer simulations. The theoretical and simulation results show that the BER performance difference between the new and conventional PBNJ models is larger for smaller M,Nh,.
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