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。
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.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
1993年第1期27-31,共5页
Journal of University of Electronic Science and Technology of China
基金
国家气象局八五科技攻关基金
关键词
卫星通信
气象资料
BCH码
卷积码
satellite communication
meteorological data
BCH codes
convolutional codes
punctured convolutional codes
Viterbi decoding
