Design of unequal error protection for MIMO-OFDM systems with hierarchical signal constellations

Yujin Noh, Heunchul Lee, Wonjun Lee, Inkyu Lee

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


In multimedia communication systems, efficient transmission system design should incorporate the use of matching unequal error protection (UEP), since source coders exhibit unequal bit error sensitivity. In this paper, we present UEP schemes which exploit differences in bit error protection levels in orthogonal frequency division multiplexing (OFDM) systems over frequency selective fading channels. We introduce an UEP scheme which improves the link performance with multiple transmit and receive antennas. Especially, we propose a new receiver structure based on two stage Maximum Likelihood detection (MLD) schemes which can approach the performance of a full search MLD receiver with much reduced computational complexity. In the performance analysis, we derive a generalized pairwise error probability expression for the proposed UEP schemes. Simulation results show that the proposed schemes achieve a significant performance gain over the conventional equal error protection (EEP) scheme.

Original languageEnglish
Pages (from-to)167-176
Number of pages10
JournalJournal of Communications and Networks
Issue number2
Publication statusPublished - 2007 Jun


  • Multiple-input multiple-output orthogonl frequency division multiplexing (MIMO-OFDM)
  • Multistage decoding (MSD)
  • Performance evaluation
  • Unequal error protection (UEP)

ASJC Scopus subject areas

  • Information Systems
  • Computer Networks and Communications


Dive into the research topics of 'Design of unequal error protection for MIMO-OFDM systems with hierarchical signal constellations'. Together they form a unique fingerprint.

Cite this