the fact proves that these empirical formulas have advantages of easy calculation, wide applications, high reliability and less error rate 实践证明,所列的公式具有计算方便、实用性强、可靠性高、误差率小的优点。
in the channel decoding part, viterbi algorithm and de-interleaving are realized to decrease bit error rate and increase transmission efficiency 这些都在一定程度上降低了信道的误码率,提高了的信道的传输效率。
analysis performance expressions of the bit error rates are derived, and logsitic map with zero mean is used for chaos generation in simulation 推导该方案的理论误码性能,以零均值logistic混沌映射为例进行仿真实验。
automatic-repeat-request ( arq ), which helps transmit data at very low error rate, has been proposed to combat the bad channel 自动请求重传(arq)技术,特别是混合arq(harq),在提高传输的可靠性方面发挥了巨大的作用。
to decrease error rate, we preprocess the hidden information by convolutional code and decode them by viterbi decoder . 2 在嵌入信息之前先将隐秘信息进行卷积编码,对从隐藏图像检测出的信息使用viterbi译码,以降低误码率。