| 卫星气象资料广播分发差错控制技术的研究 |
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| 引用本文： | 钱寿宇.卫星气象资料广播分发差错控制技术的研究[J].电子科技大学学报(社会科学版),1993(1). |
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| 作者姓名： | 钱寿宇 |
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| 作者单位： | 成都气象学院电子技术系 成都 |
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| 摘 要： | 研究了适用于卫星气象资料广播分发的三种差错控制技术方案,并用计算机进行了大量的性能模拟试验,证实了采用BCH(127,106)的方案可将误码率从10~(-3)改进为<10~(-9),传输效率为81％;卷积码的维特比(Viterbi)译码(r=1/2,k=6)方案对误码率可提供更大的改善,但传输效率<50％;收缩码方案(r=2/3,k=6)在随机差错模式下的性能甚至比预料的更好。
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| 关 键 词： | 卫星通信 气象资料 BCH码 卷积码 收缩码 维特比译码 |
THE RESEARCH ON ERROR-CONTROL T ECHNIQUES FOR BROADCAST-DISTRIBUTING OF SATELLITE-METEOROLOGICAL DATA |
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| Qian Shouyu.THE RESEARCH ON ERROR-CONTROL T ECHNIQUES FOR BROADCAST-DISTRIBUTING OF SATELLITE-METEOROLOGICAL DATA[J].Journal of University of Electronic Science and Technology of China(Social Sciences Edition),1993(1). |
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| Authors: | Qian Shouyu |
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| Abstract: | The three error-control schemes for broadcast-distributin gof satellite meteorological data arc discussed. The computer simulation tests confirm the scheme of BCH codes (127,106) can improve bit-error probability from 10~(-5) to 10~(-9) with code-rata 81%. The scheme of Viterbi decoding of convolutional codes ( r= 1/2, k= 6) can provide more improvement for bit-error probability, but the code-rate is less than 50%. The scheme of puntured convolutional codes (r=2/3, k=6) has better performance than expected that under the radom-error model. |
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| Keywords: | satellite communication meteorological data BCH codes convolutional codes punctured convolutional codes Viterbi decoding |
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