论文标题
用于插入，删除和替换错误的频道的延迟编码方案
Delayed Coding Scheme for Channels with Insertion, Deletion, and Substitution Errors
论文作者
论文摘要
我们建议使用插入，删除和替换（IDS）错误的通道，提出了一种称为“延迟编码（DC）方案”的新编码方案。所提出的方案采用延迟的编码和非著作检测和解码策略来管理线性代码中多个代码字的传输。在DC方案中，通道输入序列由以前的时间实例到当前时间实例的多个代码字的子块组成。在接收器侧，最大后验检测适用于在当前时间实例上包含代码字信息的接收序列，该序列先进的代码字辅助检测。然后执行通道代码解码，并利用外部消息来进行以下时间实例的编码字估计。我们表明，在IDS通道上，DC方案可实现的速率接近通道的对称信息速率。此外，我们还显示了DC方案与低密度平价检查代码的出色渐近性和有限长度性能。
We propose a new coding scheme, called the delayed coding (DC) scheme, for channels with insertion, deletion, and substitution (IDS) errors. The proposed scheme employs delayed encoding and non-iterative detection and decoding strategies to manage the transmission of multiple codewords in a linear code. In the DC scheme, a channel input sequence consists of subblocks of multiple codewords from the previous to current time instances. At the receiver side, the maximum a posteriori detection applies to the received sequences that contain information of the codeword at the current time instance, where priorly decoded codewords aid the detection. The channel code decoding is then performed, and extrinsic messages are exploited for the codeword estimations of the following time instances. We show that the rate achievable with the DC scheme over the IDS channel approaches the symmetric information rate of the channel. Moreover, we show the excellent asymptotic and finite-length performances of the DC scheme in conjunction with low-density parity-check codes.
