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Low-Complexity Maximum-Likelihood Decoder for VBLAST-STBC Scheme Using Non-square OSTBC Code Rate 3/4  

Pham Van-Su (School of Engineering, Information and Communications University (ICU))
Le Minh-Tuan (School of Engineering, Information and Communications University (ICU))
Mai Linh (School of Information and Communications University (ICU))
Yoon Gi-Wan (School of Information and Communications University (ICU))
Abstract
This work presents a low complexity maximum-likelihood decoder for signal detection in VBLAST-STBC system, which employs non-square O-STBC code rate 3/4. Stacking received symbols from different symbol duration and applying QR decomposition result in the special format of upper triangular matrix R so that the proposed decoder is able to provide not only ML-like BER performance but also very low computational load. The low computational load and ML-like BER performance properties of the proposed decoder are verified by computer simulations.
Keywords
Space-time coding; Multiple-Input Multiple-Output (MIMO) system; VBLAST; Wireless Communication System; Maximum likelihood detection;
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