Multiple subcarrier modulation for infrared wireless systems using punctured convolutional codes and variable amplitude block codes

Hiroe Yamaguchi, Tomoaki Ohtsuki, Iwao Sasase

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

In this paper, we propose multiple subcarrier modulation (MSM) for infrared wireless systems using punctured convolutional codes and variable amplitude block codes to minimize the average optical power by allocating the appropriate amplitudes to the puncturing bits. The proposed system maps the coded bits corresponding to zeros in the puncturing table to the amplitudes of subcarriers, while the rate-compatible punctured convolutional (RCPC) code deletes them. We compare two proposed systems with the conventional systems: one block code maps the coded bits corresponding to zeros in the puncturing table to zeros (proposed 1), and the other maps them to the appropriate values among 0, and ±1 (proposed 2) so that the required bias can be minimized. We show that the proposed 2 can achieve the minimum required SNR at the same average optical power and the same information rate among all the systems.

Original languageEnglish
Pages (from-to)2433-2439
Number of pages7
JournalIEICE Transactions on Communications
VolumeE86-B
Issue number8
Publication statusPublished - 2003 Aug

Keywords

  • Block code
  • Indoor infrared wireless system
  • MSM
  • RCPC

ASJC Scopus subject areas

  • Software
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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