An analog/digital mode-switching LDPC codec
An analog/digital mode-switching LDPC codec
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一种模拟/数字模式切换 LDPC 编解码器
DOI：
10.1109/iscas.2005.1465954
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
C. Schlegel
中科院分区：
文献类型：
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作者：
David Haley;C. Winstead;V. Gaudet;A. Grant;C. Schlegel
针对一类低密度奇偶校验码，我们提出了一种新颖的时间复用编解码器，它可以在模拟解码和数字编码模式之间切换。为了在单个电路中实现这种行为，我们开发了模式开关门。这些逻辑门能够在模拟（软）和数字（硬）计算之间切换。将模拟解码器转换成完整的编解码器只需要很小的电路面积开销。编码操作可以比解码操作快两个数量级，使电路适合全双工应用。对于编码和解码操作，编解码器的吞吐量与块大小呈线性关系。电路的低功耗和小面积要求使其成为小型便携式设备的有吸引力的选择。
We present a novel time-multiplexed codec for a class of low-density parity-check codes, which switches between analog decode and digital encode modes. In order to achieve this behaviour from a single circuit we have developed mode-switching gates. These logic gates are able to switch between analog (soft) and digital (hard) computation. Only a small overhead in circuit area is required to transform the analog decoder into a full codec. The encode operation can be performed two orders of magnitude faster than the decode operation, making the circuit suitable for full-duplex applications. Throughput of the codec scales linearly with block size, for both encode and decode operations. The low power and small area requirements of the circuit make it an attractive option for small portable devices.