摘要
在无线ATM网络中,无线信道的高误码率和突发特性要求对无线ATM信元有较强的误码保护.提出了一种适应于无线ATM系统混合纠错方案:用级联码保护语音信号,及BCH/混合Ⅱ型ARQ保护图像和数据.分析和仿真了这一混合纠错方案在高斯白噪声信道上的性能,仿真结果表明,该方案在降低信元信息错误率的同时有效地降低了信元丢失率.
In wireless ATM network, a strong protection mechanism for error codes is needed due to the characters of high bit error rates and lots of bursting errors. This paper presented a hybrid error-correcting scheme for WATM：Phonetic signal was protected by BCH code, image and data were protected by hybrid Ⅱ ARQ with BCH code. The error control scheme was simulated and analysed in Gauss white noise channel. The numerical results show that the cell loss rate is remarkably reduced. Simultaneously, the cell error rate is decreased.
出处
《应用科技》
CAS
2005年第12期51-53,56,共4页
Applied Science and Technology
