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RWSoftware
(136 results)-
Whitepapers
How a Layered REM Architecture Brings Cognition to Today's Mobile Networks
June 10, 2012, 12:00am PDT
In this paper, the authors present a layered Radio Environment Map (REM) architecture along with its applications to the Self-Organizing Network (SON) functionalities of heterogeneous LTE...
Provided by RWSoftware
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Whitepapers
Interference Management in Heterogeneous Wireless Networks Based on Context Information
June 21, 2012, 12:00am PDT
Femtocells and WiFi have been considered as viable concepts in cellular networks to increase overall system capacity. Critical functionalities for the successful integration of such technologies...
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Whitepapers
Impact of Measurement Configurations on the Accuracy of Propagation Model Estimation With Applications to Dynamic Spectrum Access
July 26, 2012, 12:00am PDT
In this paper, the authors investigate the possibility of using measurement-based propagation models in the framework of Dynamic Spectrum Access (DSA), where secondary users can opportunistically...
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Whitepapers
Rate Selection Analysis Under Semi-Persistent Scheduling in LTE Networks
October 7, 2012, 12:00am PDT
Upcoming LTE networks have basically two different modes for scheduling data in the down-link by the base station. Dynamic scheduling brings the advantage of exploiting instantaneous channel state...
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Whitepapers
The Outage Performance of Realtime Transmission in Multiple Asynchronous Relays Enhanced OFDM System
October 18, 2012, 12:00am PDT
This paper considers the outage performance of multiple relays transmission in Orthogonal Frequency Division Multiplexing (OFDM) systems. Relaying has been suggested in general to improve the...
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Whitepapers
On the Outage Probability and Effective Capacity of Multiple Decode-and-Forward Relay System
January 1, 2013, 12:00am PST
This paper investigates the quality-of-service performance of multiple decode-and-forward relay system. In particular, the authors study the outage probability and effective capacity performance...
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Whitepapers
Distributed TV Spectrum Allocation for Cognitive Cellular Network Under Game Theoretical Framework
August 23, 2012, 12:00am PDT
This paper proposes efficient schemes for wireless cellular base stations to utilize TV white spectrum (such base stations referred to as white base stations - WBS), so that WBSes can provide good...
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Whitepapers
Multi-Level Parallelism for Time-And Cost-Efficient Parallel Discrete Event Simulation on GPUs
April 18, 2012, 12:00am PDT
Developing complex technical systems requires a systematic exploration of the given design space in order to identify optimal system configurations. However, studying the effects and interactions...
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Whitepapers
Know Thy Simulation Model: Analyzing Event Interactions for Probabilistic Synchronization in Parallel Simulations
March 23, 2012, 12:00am PDT
Efficiently scheduling and synchronizing parallel event execution constitutes the fundamental challenge in parallel discrete event simulation. Existing synchronization algorithms typically do not...
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Whitepapers
Predicting Runtime Performance Bounds of Expanded Parallel Discrete Event Simulations
May 3, 2011, 12:00am PDT
Predicting and analyzing runtime performance characteristics is a vital step in the development process of parallel discrete event simulations. For instance, model developers need to identify and...
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Whitepapers
A Game-Theoretic Approach to Routing Under Adversarial Conditions
May 14, 2010, 12:00am PDT
The authors present a game-theoretic framework for modeling and solving routing problems in dynamically changing networks. The model covers the aspects of reactivity and non-termination, and it is...
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Whitepapers
A Two-Stage Approach to WLAN Planning: Detailed Performance Evaluation Along the Pareto Frontier
April 27, 2010, 12:00am PDT
This paper proposes an efficient solution to the open problem of network planning for large-scale WLAN deployments. WLAN performance is governed by the CSMA-CA protocol, whose dynamic effects are...
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Whitepapers
How Bad Is Interference in IEEE 802.16e Systems?
April 14, 2010, 12:00am PDT
This paper presents a performance model for dynamic resource allocation in cellular deployments of IEEE 802.16e-like systems. More specifically, the authors derive a framework which allows to...
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Whitepapers
The K - Constrained Bipartite Matching Problem: Approximation Algorithms and Applications to Wireless Networks
December 21, 2009, 12:00am PST
In communication networks, resource assignment problems appear in several different settings. These problems are often modeled by a maximum weight matching problem in bipartite graphs and...
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Whitepapers
Considering Microelectronic Trends in Advanced Wireless System Design
April 1, 2010, 12:00am PDT
Wireless communication system design has been a booming topic since the shift into the digital era in the 1990s. In the same period of time, microelectronic technologies have reached new paradigm...
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Whitepapers
Energy Efficiency of Network-Based Acoustic Echo Control in Mobile Radio
September 28, 2012, 12:00am PDT
In this paper, the authors investigate the energy efficiency of network-based Acoustic Echo Control (AEC). Usually, AEC is implemented in the mobile terminal. Due to the limited resources of the...
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Whitepapers
Extended Cyclostationary Signatures for OFDM-Based Cognitive Radio
February 2, 2012, 12:00am PST
Cyclostationary signatures have been shown to be an effective method for OFDM network synchronization and Cognitive Radio coordination. In this paper, an extended method that utilizes...
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Whitepapers
Autoregressive Modeling of Frequency Selective Channels for Synchronized OFDM Systems
January 14, 2012, 12:00am PST
In this paper, an Auto-Regressive (AR) channel model for simulating frequency selective channels in synchronized Orthogonal Frequency Division Multiplexing (OFDM) systems is proposed. By frequency...
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Whitepapers
Field Strength Prediction for Environment Aware MIMO Channel Models
January 16, 2012, 12:00am PST
For planning, analysis, and optimization of modern, self organizing radio networks field strength prediction plays an essential role. A huge number of predictions is needed for planning purposes...
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Whitepapers
Dynamic Cell Association for Downlink Sum Rate Maximization in Multi-Cell Heterogeneous Networks
May 24, 2012, 12:00am PDT
In this paper, the authors consider a heterogeneous network consisting in several macro nodes and pico nodes. The goal is to associate users, belonging to this network, to one of the nodes, while...
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Whitepapers
Detecting Irregularities in Blog Comment Language Affecting POS Tagging Accuracy
June 13, 2012, 12:00am PDT
Studying technology acceptance requires the survey and analysis of user opinions to identify acceptance-relevant factors. In addition to surveys, Web 2.0 poses a huge collection of user comments...
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Whitepapers
Distributed Compressed Sensing for the MIMO MAC With Correlated Sources
May 24, 2012, 12:00am PDT
In this paper, the authors consider the transmission of jointly sparse signals over a MIMO MAC composed of two transmitters and one receiver. Distributed compression is performed at the...
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Whitepapers
Reachability of the Capacity in Parallel Quantised Channels
July 5, 2012, 12:00am PDT
Based upon profound knowledge about wireless communication systems that was gathered during the past decades, modelling biological systems analogously has become more and more popular. Although...
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Whitepapers
Hardware Acceleration Techniques for 3D Urban Field Strength Prediction
September 4, 2007, 12:00am PDT
Planning and optimization of radio networks are active research areas. Therefore, both fast and accurate radio wave propagations predictions are required. To fulfill those requirements the authors...
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Whitepapers
Graphics Hardware Accelerated Field Strength Prediction for Rural and Urban Environments
November 20, 2007, 12:00am PST
Acceleration techniques on graphics hardware for field strength prediction algorithms are presented. The authors identify some basic building blocks of common propagation algorithms and propose...
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Whitepapers
Capacity of General Discrete Noiseless Channels
June 10, 2010, 12:00am PDT
This paper concerns the capacity of the discrete noiseless channel introduced by Shannon. A sufficient condition is given for the capacity to be well-defined. For a general discrete noiseless...
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Whitepapers
Kernel-Based Learning of Decision Fusion in Wireless Sensor Networks
May 8, 2008, 12:00am PDT
The problem of decision fusion in wireless sensor networks for distributed detection applications has mainly been considered in scenarios where sensor observations are conditionally independent...
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Whitepapers
Cooperative Protocols for Random Access Networks
January 23, 2009, 12:00am PST
Cooperative communications have emerged as a significant concept to improve reliability and throughput in wireless systems. On the other hand, WLANs based on random access mechanism have become...
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Whitepapers
Theoretical Analysis of the Energy Capture in Strictly Bandlimited Ultra-Wideband Channels
August 7, 2008, 12:00am PDT
Ultra-wideband communication offers the attractive possibility to achieve high data rates with low transmission power and is a candidate for the air interface of next generation wireless personal...
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Whitepapers
Optimal and Efficient Bit Loading for OFDM in the Presence of Channel Uncertainty
August 8, 2008, 12:00am PDT
In practice only imperfect Channel State Information (CSI) is available at the transmitter due to noisy and time-varying channel. In this paper, the authors consider optimal bit loading for...
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Whitepapers
Fast Resource Allocation for OFDMA Downlink Utilizing an Efficient Discrete Bit Loading
September 4, 2008, 12:00am PDT
In this paper, bit loading for Orthogonal Frequency Division Multiplexing (OFDM) is studied first. The continuous water-filling is modified to take the maximal rate constraint on each subcarrier...
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Whitepapers
Optimum Discrete Signaling Over Channels With Arbitrary Noise Distribution
September 19, 2008, 12:00am PDT
General channels with arbitrary noise distributions and a finite set of signaling points are considered in this paper. The authors aim at finding the capacity-achieving input distribution. As a...
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