Iterative detection and decoding with an improved V-BLAST for MIMO-OFDM systems
| Autor: | Inkyu Lee, Byeongsi Lee, Heunchul Lee |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Theoretical computer science
Computer Networks and Communications Computer science Orthogonal frequency-division multiplexing MIMO Radio receiver Data_CODINGANDINFORMATIONTHEORY Multiplexing law.invention symbols.namesake law Control theory Electronic engineering Turbo code Fading Electrical and Electronic Engineering Wideband Computer Science::Information Theory Channel code Detector Spectral efficiency MIMO-OFDM Additive white Gaussian noise Computer engineering Single antenna interference cancellation Bit rate symbols Decoding methods Communication channel |
| Zdroj: | ICC |
| ISSN: | 0733-8716 |
| DOI: | 10.1109/jsac.2005.862400 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|