短波跳頻系統(tǒng)中分組Turbo碼在阻塞干擾下的性能分析
Performance analysis of block turbo code in short wave FH system with the barrage jamming
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摘要: 該文基于短波跳頻(FH)系統(tǒng)的特點,對短波跳頻系統(tǒng)中分組 Turbo碼的聯(lián)合上界進行了分析和推導(dǎo),給出了該編碼在阻塞干擾存在的情況時平均誤碼率上限的數(shù)學(xué)表達式。并對分組 Turbo碼在短波阻塞信道下的性能進行了數(shù)值模擬,結(jié)果表明:分組 Turbo碼用于跳頻系統(tǒng)時,在短波慢瑞利衰落的信道下,當信噪比為 20dB,信號阻塞比為 30dB時,可使系統(tǒng)的比特誤碼率由 10-3降為 10-5。
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關(guān)鍵詞:
- 分組Turbo碼; FH; 短波; 聯(lián)合上界
Abstract: Based on the characteristics of Frequency Hopping(FH) system, the union-upper-bound of Block Turbo Codes (BTCs) in the short wave FH system is analyzed and deduced. The union-upper-bound equation for BTCs is given out in the barrage jamming. The numerical simulation of the BTCs is performed in short-wave jamming channel. When the signal-to-jamming ratio is 30dB, and signal-to-noise ratio is 20dB, simulation results show that using BTCs in FH system can reduce the bit error rate from 10-3 to 10-5. -
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