| 引用本文： |
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肖创创,郭荣海,李际平,等.直升机卫星通信系统中Turbo码外交织器设计与仿真[J].电讯技术，2014，54（4）： - . [点击复制]
- XIAO Chuang-chuang,GUO Rong-hai,LI Ji-ping,et al.Design and simulation of Turbo codes’ interleaver in helicopter satellite communication system[J].，2014，54（4）： - . [点击复制]
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| 摘要: |
| 在直升机卫星通信系统（HSCS）中，如何克服由于旋翼遮挡导致的系统性能恶化是一个亟需解决的关键问题。旋翼遮挡相当于对码字信息的成片删除，通过分析删余Turbo码中删余矩阵的设计准则，首先对Turbo码的编码结构进行改进，并提出了一种适用于直升机旋翼遮挡环境下的交织器。它满足以下特性：将删除均匀分散在整个码字序列中，变突发错误为随机错误;码字中每个信息位与其对应的2比特校验位中最多只删1位;与被删比特组相邻的两个比特组保留;删除部分中以信息位-校验位1-校验位2的模式循环，这些特性保证了删除信息的可靠恢复。最后对不同遮挡比例下新型交织器与传统交织器进行仿真比较，结果表明采用新型交织器改善了数据传输的误码率(BER)性能，提高了HSCS系统的可靠性。 |
| 关键词: 直升机卫星通信系统；旋翼遮挡；突发错误； 删余Turbo码 交织器设计 |
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| Design and simulation of Turbo codes’ interleaver in helicopter satellite communication system |
| XIAO Chuang-chuang,GUO Rong-hai,LI Ji-ping,WU Tuan-feng,HUANG Yao,LI Hong-sheng |
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| Abstract: |
| In Helicopter Satellite Communication System(HSCS), the rotor shield will result in the deteriorative performance of the system.The codes can be partly punctured by the rotor shield and it is an imperative problem.Through the analysis of the punctured Turbo codes, a new interleaver which can be well applied in this system is proposed. The characters that the interleaver satisfies include (1)dispersing the punctured code chips among all the chips and turning burst errors into random errors,(2)both systematic and parity outputs of the same information bit should be deleted only one bit,(3)reserving the neighborhoods of the punctured bit field,(4)the punctured bits should folow the cycle model of systematic bit—the first parity bit—the second parity bit. Finally,comparison between the new pattern interleaver and the conventional ones shows that the former one makes the code′s bit error rate(BER) performance obtain more amelioration and improves the HSCS′ communication reliability. |
| Key words: helicopter satellite communication system(HSCS) rotor shield burst error punctured Turbo code interleaver design |
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