On the implementation of MIMO-OFDM schemes using perturbation of the QR decomposition: Application to 3GPP LTE-a systems

Consider a flat-fading Multiple-Input Multiple-Output (MIMO) system. The near-optimum detection problematic has been shown to be efficiently solved through QR Decomposition (QRD)-based detectors. However, this step is demanding, and leads to wasting a large part of the system resource in case of a straightforward multi-carrier extension. In this paper, a solution that provides the QRD output - by advantageously considering the correlation between adjacent channels - is proposed. Originally, it relies on the matrix perturbation theory and induces a strong complexity reduction. Simulation results show that the proposed solution significantly reduces the implementation complexity while maintaining good performance.

• Type: Journal
• Year: 2011
• Where: ICASSP
• Authors: Sébastien Aubert, Jane Tournois, Fabienne Nouvel
• Keywords: ICASSP 2011, Matrix Perturbation Theory, Signal Processing, Straightforward Multi-carrier Extension, Strong Complexity Reduction