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mimo
(3804 results)-
Whitepapers
Flexible Orthogonal Code for CDMA Based MIMO-OFDM Systems With Space-Time -Frequency Spreading
April 18, 2008 12:00am PDT
The authors propose a novel spreading code, called Flexible-Orthogonal Code (FOC), for Space-Time-Frequency Spreading (STFS) scheme in Code Division Multiple Access (CDMA) based Multiple Input...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Coherent Relaying in Cooperative MIMO Communication Systems
April 18, 2008 12:00am PDT
In this paper the authors propose an enhancement to the Amplify and Forward (AF) protocol. The proposed multi-relay scheme assumes that the source, destination, and each relay have M, N, and 1...
Provided by: Queens Presbyterian Church
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White Papers
Transmit Antenna Selection Schemes With Reduced Feedback Rate
April 18, 2008 12:00am PDT
Multiple-Input-Multiple-Output (MIMO) systems with antenna subset selection for space-time codes have been a subject of intense research. In general, antenna subset selection can be classified as...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Fluctuations of the SNR at the Wiener Filter Output for Large Dimensional Signals
April 17, 2008 12:00am PDT
Consider the linear Wiener receiver for multidimensional signals. Such a receiver is frequently encountered in wireless communications and in array processing, and the Signal to Noise Ratio (SNR)...
Provided by: CNRS
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White Papers
Decentralized Dynamic Channel Allocation for MIMO Systems
April 17, 2008 12:00am PDT
A common scenario in wireless communication systems is one where several systems coexist in the same area and communicate using the same portion of the spectrum, possibly even using different...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Grassmannian Beamforming for MIMO Amplify-and-Forward Relaying
April 16, 2008 12:00am PDT
The authors consider the problem of beamforming codebook design for limited feedback half-duplex Multiple-Input Multiple-Output (MIMO) Amplify-and-Forward (AF) relay system. In the first part of...
Provided by: University of Toronto
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Whitepapers
Downlink Linear Max-MSE Transceiver Design for Multiuser MIMO Systems via Dual Decomposition
April 15, 2008 12:00am PDT
This paper addresses the problem of joint linear transceiver design in the downlink of multiuser MIMO systems. The authors define the performance criterion as minimizing the Maximal Mean Square...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Uniform Energy Consumption Through Adaptive Optimal Selection of Cooperatie MIMO Schemes in Wireless Sensor Networks
April 15, 2008 12:00am PDT
An energy efficient cooperative MIMO selection scheme is proposed for uniform load distribution in cluster based wireless sensor networks. The intrinsic data flow direction in multi hop cluster...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Joint Generalized Antenna Combination and Symbol Detection Based on Minimum Bit Error Rate: A Particle Swarm Optimization Approach
April 15, 2008 12:00am PDT
In order to reduce hardware cost and achieve superior performance in Multi-Input Multi-Output (MIMO) systems, this paper proposes a novel scheme for joint antenna combination and symbol detection....
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Joint Multiuser Precoding and Scheduling With Imperfect Channel State Information at the Transmitter
April 15, 2008 12:00am PDT
This paper addresses the joint design of multiuser precoding and scheduling for downlink MultiUser (MU-) Multiple-Input-Multiple-Output (MIMO) systems with imperfect channel state information at...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Irregular Precoder-Aided Differential Linear Dispersion Codes
April 15, 2008 12:00am PDT
In this paper, the authors propose a novel family of serial concatenated IrRegular Convolutional Coded (IRCC) IrRegular Precoded Differential Linear Dispersion Codes (IR-PDLDC). The irregularity...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Uncoupled Antenna Matching for Performance Optimization in Compact MIMO Systems Using Unbalanced Load Impedance
April 15, 2008 12:00am PDT
Some MIMO applications require antennas to be closely spaced, which result in mutual coupling among antennas and high spatial correlation for signals. In order to compensate for the performance...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Channel Modification Strategy for Capacity of MIMO Channels With Channel Estimation Error
April 15, 2008 12:00am PDT
Multiple Input Multiple Output (MIMO) systems provide dramatic capacity gain through an increased spatial dimension. However, the capacity gain is reduced if the Channel State Information (CSI) is...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
A Generic Validation Framework for Wideband MIMO Channel Models
April 15, 2008 12:00am PDT
In this paper, a generic framework for validating wideband MIMO channel models based on channel measurement results is proposed. The framework is formulated as a series of continuous functions...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Capacity Gain Analysis With Antenna Selection for a Frequency Selective MIMO Measured Channel
April 15, 2008 12:00am PDT
In this paper, the authors addressed the capacity gains achieved when the antenna selection is carried out in a frequency selectivity MIMO measured channel. The best antenna subsets were selected...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Efficient Space Time Combination Technique for Unsynchronized Cooperative MISO Transmission
April 15, 2008 12:00am PDT
In the context of cooperative Multi-Input Multi-Output (MIMO) techniques for wireless sensor networks, the transmission synchronization error impact is investigated in this paper and a new...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
On the Diversity Order of AF Cooperative Systems With Inter-Relay Interference Cancellation
April 15, 2008 12:00am PDT
In this paper, the authors analyze a full rate cooperative communication system using Amplify-and-Forward (AF) two-path relaying scheme with inter-relay interference cancellation at the relay. By...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
BEP Analysis of MRT/MRC Diversity in Rayleigh Fading Channels
April 15, 2008 12:00am PDT
This paper analyzes the Bit Error Probability (BEP) performance of Multiple-Input/Multiple-Output (MIMO) systems employing Maximal Ratio Transmission/Maximal Ratio Combining (MRT/MRC) diversity in...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Improving MIMO Capacity With Directive Antennas for Outdoor-Indoor Scenarios
April 15, 2008 12:00am PDT
In general, MIMO systems are associated with high scattering isotropic propagation while the use of directive antennas is associated with free space or narrow angular spread conditions. The...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
A Wideband One-Ring MIMO Channel Model Under Non-Isotropic Scattering Conditions
April 15, 2008 12:00am PDT
In this paper, the authors present a wideband one-ring Multiple-Input Multiple-Output (MIMO) channel model for non-isotropic scattering environments. The model is designed in such a way that the...
Provided by: Institute of Electrical & Electronic Engineers
