Abstract
Multiple-input-multiple-output (MIMO) systems provide a very promising means to increase the spectral efficiency for wireless systems. By using orthogonal frequency-division multiplexing (OFDM), wideband transmission can be achieved over frequency-selective fading radio channels. First, in this paper, we introduce an improved vertical Bell Labs layered space-time (V-BLAST) receiver which takes the decision errors into account. Second, we propose an iterative detection and decoding (IDD) scheme for coded layered space-time architectures in MIMO-OFDM systems. For the iterative process, a low-complexity demapper is developed by making use of both nonlinear interference cancellation and linear minimum mean-square error filtering. Also, a simple cancellation method based on hard decision is presented to reduce the overall complexity. Simulation results demonstrate that the proposed IDD scheme combined with the improved V-BLAST performs almost as well as the optimal turbo-MIMO approach, while providing tremendous savings in computational complexity.
| Original language | English |
|---|---|
| Pages (from-to) | 504-513 |
| Number of pages | 10 |
| Journal | IEEE Journal on Selected Areas in Communications |
| Volume | 24 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2006 Mar |
Bibliographical note
Funding Information:Manuscript received January 31, 2005; revised April 29, 2005. This work was supported in part by the Samsung Electronics Research Project (Skypass4G) and in part by the Korea Science and Engineering Foundation under Grant R08-2003-000-10761-0.
Keywords
- Iterative detection and decoding (IDD)
- Multiple-input-multiple-output (MIMO) systems
- Orthogonal frequency-division multiplexing (OFDM)
- Vertical bell labs layered space-time (V-BLAST)
ASJC Scopus subject areas
- Computer Networks and Communications
- Electrical and Electronic Engineering