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(5246 results)-
Whitepapers
Multiple Description Coding Over Erasure Channels
April 18, 2008 12:00am PDT
In this paper, the authors study the optimal rate allocation of multiple description coding over multiple erasure channels in order to attain the minimum average distortion of the recovered...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Performance Analysis of Fault-Tolerant Offloading Systems for Pervasive Services in Mobile Wireless Environments
April 18, 2008 12:00am PDT
Offloading (also known cyber-foraging) is an approach to leverage the severity of resource constrained nature of mobile devices (such as PDAs) by migrating part of the computation of applications...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Analytical Evaluation on the Performance of Ad Hoc Networks When Using Beamforming Techniques
April 18, 2008 12:00am PDT
In this paper, the authors evaluate through analytical modeling, the performance of ad hoc networks when the nodes are endowed with M-element antenna array. They first derive the loss probability...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Weighted Fair Uplink/Downlink Access Provisioning in IEEE 802.11e WLANs
April 18, 2008 12:00am PDT
The authors present the unfairness problem between the uplink and the downlink flows in the IEEE 802.11e infrastructure Basic Service Set (BSS) when the default settings of the Enhanced...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
A Unified Model for Performance Analysis of 802.11 in Heterogeneous Traffic and Saturation Condition
April 18, 2008 12:00am PDT
Bianchi's 2-Dimesional Markov model has laid the foundation for analysis of 802.11 CSMA/CA mechanism. However, the assumption that every station is saturated significantly degrades the accuracy of...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
An Analysis of Opportunistic Routing in Wireless Mesh Network
April 18, 2008 12:00am PDT
Recently, the idea of Opportunistic Routing has been widely explored to improve the performance of multi-hop wireless mesh networks. Most of the previous studies use simulations or empirical...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
An Analytical Model for Handoff Overhead Analysis in Internet-Based Infrastructure Wireless Mesh Networks
April 18, 2008 12:00am PDT
Wireless Mesh Networks (WMNs) have recently emerged to be a cost-effective solution to support large-scale wireless Internet access. In this paper, the handoff support in Internet-based...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Performance Analysis of Downlink OFDMA Frequency Scheduling With Limited Feedback
April 18, 2008 12:00am PDT
Opportunistic user allocation based on limited feedback information has been shown to offer significant enhancement for wireless multiple access communications. In this paper, theoretical analysis...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
A Lattice-Theoretic Analysis of Vector Perturbation for Multi-User MIMO Systems
April 18, 2008 12:00am PDT
This paper considers the use of multiple transmit antennas to deliver independent data streams to multiple users. In particular, the authors examine a multi-user technique known as vector...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Performance Analysis of Weighted Proportional Fairness Scheduling in IEEE 802.16 Networks
April 18, 2008 12:00am PDT
In IEEE 802.16 Networks, a Subscriber Station (SS) could be a single mobile user, a residence house, or an office building providing Internet service for multiple customers. Considering the...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Receive Correlation-Based User Scheduling for Collaborative Spatial Multiplexing Systems
April 18, 2008 12:00am PDT
In this paper, the authors propose a user scheduling scheme to maximize the ergodic capacity of multi-user MIMO uplink systems. The proposed scheduling scheme only considers the use of the receive...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Optimizing Delay Performance Over MIMO Fading Channels With Adaptive Transmission
April 18, 2008 12:00am PDT
In this paper, the authors consider the problem of transmitting a delay-sensitive and bursty traffic over a time-varying MIMO Nakagami-m fading channel, and optimize the delay performance of...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Analysis of OFDM Signals in Nonlinear High Power Amplifier With Memory
April 18, 2008 12:00am PDT
This paper analyzes the effects of nonlinear High Power Amplifier (HPA) with memory on an Orthogonal Frequency Division Multiplexing (OFDM) signal, by modeling the nonlinear HPA as a memory...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Queuing Delay and Buffer Distribution of Two-User Opportunistic Scheduling Schemes in Wireless Networks
April 18, 2008 12:00am PDT
In the authors' earlier works, they proposed rate adaptive modulation assisted two-user opportunistic scheduling schemes. The proposed schemes are innovative in the sense that they include second...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
On the Outage and Error Probability of Amplify-and-Forward Multi-Hop Diversity Transmission Systems
April 18, 2008 12:00am PDT
Simple, closed-form expressions for the outage probability and bit error rate of multi-hop diversity transmission systems employing either fixed or selective amplify-and-forward relaying are...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Network Beamforming With Channel Means and Covariances at Relays
April 18, 2008 12:00am PDT
This paper is on beamforming in networks whose relays know the channel means and co-variances. The question the authors answer is: To optimize the network performance, how much power should each...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Ergodic Capacity Analysis of Wireless Relaying Systems in Rayleigh Fading
April 18, 2008 12:00am PDT
The ergodic capacities in Rayleigh fading of various wireless relaying systems with an arbitrary number of half-duplex relays are analyzed, assuming channel state information is only known at the...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Ordered Eigenvalues of a General Class of Hermitian Random Matrices and Performance Analysis of MIMO Systems
April 18, 2008 12:00am PDT
In this paper, the authors present a general formulation that unifies the probabilistic characterisation of Hermitian random matrices with a specific structure. Based on a unified expression for...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Numerical Performance Evaluation of Impaired OFDM Links Using Alamouti Space Time Coding
April 18, 2008 12:00am PDT
In this paper, the authors present an analytical approach to evaluate the M-QAM Bit Error Rate (BER) as well as channel capacity of Alamouti space time coded OFDM systems in case of direct...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Sum-Rate Analysis of Multiuser MIMO System With Zero-Forcing Transmit Beamforming
April 18, 2008 12:00am PDT
In this paper, the authors present the exact sum-rate analysis of the multiuser Multiple-Input Multiple-Output (MIMO) broadcast channel with zero-forcing transmit beamforming. They develop the...
Provided by: Institute of Electrical & Electronic Engineers
