Uniform Vs. Non-Uniform Coarse Quantization in Mutual Information Maximizing LDPC Decoding

05/03/2022
by   Philipp Mohr, et al.
0

Recently, low-resolution LDPC decoders have been introduced that perform mutual information maximizing signal processing. However, the optimal quantization in variable and check nodes requires expensive non-uniform operations. Instead, we propose to use uniform quantization with a simple hardware structure, which reduces the complexity of individual node operations approximately by half and shortens the decoding delay significantly. Our analysis shows that the loss of preserved mutual information resulting from restriction to uniform quantization is very small. Furthermore, the error rate simulations with regular LDPC codes confirm that the uniformly quantized decoders cause only minor performance degradation within 0.01 dB compared to the non-uniform alternatives. Due to the complexity reduction, especially the proposed 3-bit decoder is a promising candidate to replace 4-bit conventional decoders.

READ FULL TEXT

Authors

page 4

05/14/2020

A Reconstruction-Computation-Quantization (RCQ) Approach to Node Operations in LDPC Decoding

In this paper, we propose a finite-precision decoding method that featur...
10/21/2018

Decoding of Non-Binary LDPC Codes Using the Information Bottleneck Method

Recently, a novel lookup table based decoding method for binary low-dens...
06/21/2019

Information Bottleneck Decoding of Rate-Compatible 5G-LDPC Codes

The new 5G communications standard increases data rates and supports low...
11/26/2020

Generalized Mutual Information-Maximizing Quantized Decoding of LDPC Codes

In this paper, we propose a general framework of the mutual infomration-...
07/08/2020

AUSN: Approximately Uniform Quantization by Adaptively Superimposing Non-uniform Distribution for Deep Neural Networks

Quantization is essential to simplify DNN inference in edge applications...
05/09/2013

An Adaptive Statistical Non-uniform Quantizer for Detail Wavelet Components in Lossy JPEG2000 Image Compression

The paper presents a non-uniform quantization method for the Detail comp...
03/14/2019

Detecting causality in multivariate time series via non-uniform embedding

Causal analysis based on non-uniform embedding schemes is an important w...
This week in AI

Get the week's most popular data science and artificial intelligence research sent straight to your inbox every Saturday.