...
首页> 外文期刊>IEEE Transactions on Communications >A Physical-Layer Rateless Code for Wireless Channels
【24h】

A Physical-Layer Rateless Code for Wireless Channels

机译:无线信道的物理层无速率代码

获取原文
获取原文并翻译 | 示例
           

摘要

In this paper, we propose a physical-layer rateless code for wireless channels. A novel rateless encoding scheme is developed to overcome the high error floor problem caused by the low-density generator matrix (LDGM)-like encoding scheme in conventional rateless codes. This is achieved by providing each symbol with approximately equal protection in the encoding process. An extrinsic information transfer (EXIT) chart based optimization approach is proposed to obtain a robust check node degree distribution, which can achieve near-capacity performances for a wide range of signal to noise ratios (SNR). Simulation results show that, under the same channel conditions and transmission overheads, the bit-error-rate (BER) performance of the proposed scheme considerably outperforms the existing rateless codes in additive white Gaussian noise (AWGN) channels, particularly at low BER regions.
机译:在本文中,我们提出了一种用于无线信道的物理层无速率编码。提出了一种新颖的无速率编码方案,以克服常规无速率编码中的类似低密度生成矩阵(LDGM)的编码方案所引起的高误码率问题。这是通过在编码过程中为每个符号提供近似相等的保护来实现的。为了获得鲁棒的校验节点度分布,提出了一种基于外部信息传递(EXIT)图的优化方法,该方法可以在较宽的信噪比(SNR)范围内实现接近容量的性能。仿真结果表明,在相同的信道条件和传输开销下,该方案的误码率(BER)性能明显优于加性高斯白噪声(AWGN)信道中现有的无速率码,尤其是在低BER区域。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号