Concatenated Signal Codes with Applications to Compute and Forward Conference Paper

abstract

• We present a new coding scheme based on concatenating a newly introduced class of lattice codes called signal codes with interleaved Low Density Parity Check (LDPC)codes. These codes are shown to possess a special algebraic structure which makes them suitable for recovering linear combinations (over a finite field) of the transmitted signals in a multiple access channel. This facilitates their use as a coding scheme for the recently proposed compute and forward paradigm. The decoding algorithm is based on an appropriate combination of the stack decoder with a message passing algorithm. Simulation results show that our proposed scheme can approach the uniform input AWGN capacity within 1.5 db, which is a 2 db improvement compared to using only signal codes when decoding using a stack algorithm with the same stack size. Simulation results for our proposed scheme applied to compute and forward are also presented. 2011 IEEE.

name of conference

• 2011 IEEE Global Telecommunications Conference - GLOBECOM 2011

authors

• Narayanan, Krishna

published proceedings

• 2011 IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE (GLOBECOM 2011)

author list (cited authors)

• Tunali, N. E., & Narayanan, K. R.

citation count

• 6

complete list of authors

• Tunali, Nihat Engin||Narayanan, Krishna R

publication date

• December 2011

publisher

• Institute of Electrical and Electronics Engineers (IEEE)  Publisher

published in

• n1930-529XISSN  Journal

keywords

• Bidirectional Relaying
• Compute And Forward
• Lattice Codes
• Ldpc Codes
• Signal Codes

Digital Object Identifier (DOI)

• 10.1109/glocom.2011.6134136

International Standard Book Number (ISBN) 13

• 9781424492688

start page

• 1

end page

• 5

URL

• http%3A%2F%2Fdx.doi.org%2F10.1109%2Fglocom.2011.6134136