Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
권호 표지

A Variable Rate LDPC Coded V-BLAST System

가변 부호화 율을 가지는 LDPC 부호화된 V-BLAST 시스템

  • Noh, Min-Seok (School of Engineering Information and Communications University) ;
  • Kim, Nam-Sik (School of Engineering Information and Communications University) ;
  • Park, Hyun-Cheol (School of Engineering Information and Communications University)
  • 노민석 (한국정보통신대학교 공학부) ;
  • 김남식 (한국정보통신대학교 공학부) ;
  • 박현철 (한국정보통신대학교 공학부)
  • Published : 2004.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

This this paper, we propose vertical Bell laboratories layered space time (V-BLAST) system based on variable rate Low-Density Parity Check (LDPC) codes to improve performance of receiver when QR decomposition interference suppression combined with interference cancellation is used over independent Rayleigh fading channel. The different rate LDPC codes can be made by puncturing some rows of a given parity check matrix. This allows to implement a single encoder and decoder for different rate LDPC codes. The performance can be improved by assigning stronger LDPC codes in lower layer than upper layer because the poor SNR of first detected data streams makes error propagation. Keeping the same overall code rates, the V-BLAST system with different rate LDPC codes has the better performance (in terms of Bit Error Rate) than with constant rate LDPC code in fast fading channel.

Keywords