This paper compares the packet error rate (PER) performance of several transmit/receive architectures for multiple-input multiple-output (MIMO) wireless systems. We focus our study on systems based on the IEEE 802.11a/g standard. Spatial multiplexing architectures like minimum mean square error (MMSE) detection with joint encoding at the transmitter are compared to diversity architectures based...

In this paper, a comprehensive comparison analysis in terms of outage probability and average symbol error ratio (SER) is presented for cooperative cognitive multiple-input and multiple-output (CC-MIMO) multiuser systems with amplify-and-forward (AF) protocol. Specially, we consider two scenarios where the CC-MIMO multiuser systems have the perfect and imperfect channel state information (CSI)....

An iterative receiver for Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) systems in time-frequency wireless channels is presented. Multi-User Detection (MUD) and Channel Estimation (CE) are performed using soft information iteratively provided by the single-user decoders. Bidimensional Slepian expansion exploits time and frequency channel variation. Perf...

Massive multi-input multi-output (m-MIMO) and coordinated multipoint transmission (CoMP) are quite feasible techniques to improve the spectral efficiency in next generation wireless communication systems. It is of great concern to accurately estimate channel state information (CSI) of all base stations (BSs) involved in CoMP. Muting may be applied to improve the CSI estimation, which can reduce...

Blind Separation of convolutive mixtures and Blind Equalization of Multiple-Input Multiple-Output (MIMO) channels are two different ways of naming the same problem, which we address here. A novel MIMO optimization criterion, subsequently presented in this paper, consists of a Partial Approximate Joint Diagonalization (PAJOD) of several matrices, containing some values of output cumulant multi-c...

In this paper, an equivalent model for the hybrid automatic retransmission request (HARQ) multi-input multi-output (MIMO) systems with a proper combining scheme is first introduced. Based on this effective model, we present a simple technique, termed antenna permutation scheme (APS), which permutates the transmit antennas at each retransmission to improve the diversity gain from retransmissions...

Owing to frequency diversity gain and simplicity, a chip interleaved multi-carrier code division multiple access (MC-CDMA) system has been considered in a multi-cell environment, and combining it with multiple input multiple output (MIMO) schemes offers high spectral efficiency. In spite of the advantages, the system is highly affected by inter code interferences. To control them, this letter a...

This paper evaluates a new and simple controller design method based on QFT (quantitative feedback theory) for a two-link manipulator whose first link is rigid and the second is flexible. A piezoelectric patch is attached to the surface of the flexible link for vibration suppression of it. This system is modeled as a nonlinear multi-input multi-output (MIMO) control systems whose inputs are two...

Multi-link MIMO systems, including multi-user MIMO and MIMO with base station cooperation, are essential parts of high-throughput wireless LANs and fourth-generation cellular systems. In order to fully understand such systems, the dynamic channel characteristics of multi-link MIMO channels have to be measured. In this paper we present a measurement setup that enables such measurements and does ...

In this paper the problem of clustering based identificationof a Multi-Input Multi-Output (MIMO) PieceWise Affinesystems (PWA) is considered. This approach, originallydesigned for systems with Multiple-Input Single-Output(MISO) structure, carried out by three main steps whichare data clustering, parameters vectors estimation and regionscomputing. Data most important stepbecause two other depend...