Design of LDPC codes for two-way relay systems with physical-layer network coding

Date
2013
Authors
Tanc, A. K.
Duman, T. M.
Tepedelenlioglu, C.
Editor(s)
Advisor
Supervisor
Co-Advisor
Co-Supervisor
Instructor
Source Title
IEEE Communications Letters
Print ISSN
1089-7798
Electronic ISSN
Publisher
IEEE
Volume
17
Issue
12
Pages
2356 - 2359
Language
English
Journal Title
Journal ISSN
Volume Title
Series
Abstract

This letter presents low-density parity-check (LDPC) code design for two-way relay (TWR) systems employing physical-layer network coding (PLNC). We focus on relay decoding, and propose an empirical density evolution method for estimating the decoding threshold of the LDPC code ensemble. We utilize the proposed method in conjunction with a random walk optimization procedure to obtain good LDPC code degree distributions. Numerical results demonstrate that the specifically designed LDPC codes can attain improvements of about 0.3 dB over off-the-shelf LDPC codes (designed for point-to-point additive white Gaussian noise channels), i.e., it is new code designs are essential to optimize the performance of TWR systems.

Course
Other identifiers
Book Title
Citation
Published Version (Please cite this version)