Abstract
Most multimedia source data exhibit unequal bit error sensitivity. Therefore, it is desirable to design a system where important data should be recovered with high priority. In this paper, we present unequal error protection (UEP) schemes, which exploit differences in bit error protection levels of M-ary QAM symbols, in order to support multimedia transmission in orthogonal frequency division multiplexing (OFDM) systems over frequency selective fading channels. We introduce an UEP scheme which significantly improves the performance with multiple transmit antennas. Also, we propose a receiver 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. Simulation results show that the proposed schemes achieve a significant performance gain over the conventional equal error protection (EEP) scheme.
| Original language | English |
|---|---|
| Pages (from-to) | 1058-1062 |
| Number of pages | 5 |
| Journal | IEEE Vehicular Technology Conference |
| Volume | 61 |
| Issue number | 2 |
| Publication status | Published - 2005 |
| Event | 2005 IEEE 61st Vehicular Technology Conference -VTC 2005 - Spring Stockholm: Paving the Path for a Wireless Future - Stockholm, Sweden Duration: 2005 May 30 → 2005 Jun 1 |
ASJC Scopus subject areas
- Computer Science Applications
- Electrical and Electronic Engineering
- Applied Mathematics