multiuser
RSS multiuserTransmit Selection Diversity for Multiuser Spatial Multiplexing Systems
White Paper Multiuser spatial multiplexing uses precoding to support multiple users in multi-antenna wireless channels. In the other solution, a multiuser antenna selection algorithm is proposed that achieves good performance with fewer RF chains and lower... [21 Aug 2007]
Multiuser Limited Feedback for Wireless Multi-Antenna Communication
White Paper For a wireless multi-antenna network with a large number of users, the sum capacity scales at most linearly with the number of antennas and double logarithmically the number of users. Achieving this optimal capacity scaling potentially requires... [10 Aug 2007]
Fair Multiuser Channel Allocation for OFDMA Networks Using Nash Bargaining Solutions and Coalitions
White Paper In this paper, a fair scheme to allocate subcarrier, rate, and power for multiuser OFDMA systems is proposed. The problem is to maximize the overall system rate, under each user's maximal power and minimal rate constraints, while considering the... [01 Aug 2007]
Exploiting Medium Access Diversity in Rate Adaptive Wireless LANs
White Paper This paper proposes a Medium Access Diversity (MAD) scheme that leverages the benefits of rate adaptation schemes by aggressively exploiting multiuser diversity. Recent years have seen the growing popularity of multi-rate wireless network devices... [01 Aug 2007]
Receiver Architectures for UWB-Based Transmit-Only Sensor Networks
White Paper The paper focuses on low-cost transmit-only SNs; the resulting uncoordinated multiuser-access causes packet collisions. The authors are interested in designing a low-cost, Ultra-Wide-Band (UWB) sensor network that consists of a large number of... [31 May 2007]
Short Range Wireless Channel Prediction Using Local Information
White Paper The proposed method's usefulness is demonstrated by applying it to a multiuser OFDM system. Wireless channels change due to the mobility of users, which coupled with system delays, causes outdated Channel State Information (CSI) to be used for... [26 Apr 2007]
Joint Congestion Control and OFDMA Scheduling for Hybrid Wireline-Wireless Networks
White Paper This paper considers joint congestion control and multiuser scheduling in a hybrid wireline and wireless network, where the air interface of wireless links is based on Orthogonal Frequency Division Multiplexing (OFDM). [19 Apr 2007]
Multiuser Detection and Channel Estimation in MIMO OFDM Systems Via Blind Source Separation
White Paper This paper proposes a blind multiuser detection and channel estimation method for Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency-Division Multiplexing (OFDM) systems based on Blind Source Separation (BSS). [18 Apr 2007]
A Scalable Multiuser Framework for Video Over OFDM Networks: Fairness and Efficiency
White Paper This paper proposes a framework to transmit multiple scalable video programs over downlink multiuser OFDM networks in real time. The framework explores the scalability of the video codec and multi-dimensional diversity of multiuser OFDM systems to... [13 Apr 2007]
Energy-Efficient Cooperative Transmission Over Multiuser OFDM Networks: Who Helps Whom and How to Cooperate
White Paper To quantify the questions, a power management problem is formulated over a multiuser OFDM network to minimize the overall system transmit power under the constraint of each user's desired transmission rate. [13 Apr 2007]
Optimal Resource Allocation for OFDM Multiuser Channels
White Paper In this paper, a unifying framework for Orthogonal Frequency Division Multiplexing (OFDM) multiuser resource allocation is presented. The isolated seeming problems of maximizing a weighted sum of rates for a given power budget P and minimizing sum... [11 Apr 2007]
Adaptive Subcarrier and Power Allocation for Multiuser OFDM in Wireless Environments - A Survey
White Paper The effectiveness of OFDM has prompted more research in applying it in multiuser environments. The surge in demand for methods to transmit large amounts of data over wireless channel has led to recent interest in Orthogonal Frequency Division... [11 Apr 2007]
Linear Precoding for Multiuser MIMO-OFDM Systems
White Paper This paper develops linear precoding schemes for the downlink in multiuser Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) systems with multiple data streams per user. [11 Apr 2007]
Opportunistic Dynamic Subchannel Allocation in Multiuser OFDM Networks With Limited Feedback
White Paper This paper presents a simple scheme for subchannel allocation in OFDM multiuser net-works in the presence of limited feedback, in particular, when only one bit of information per subchannel is available at the base station. [11 Apr 2007]
Performance of an Adaptive Multiuser OFDM Uplink With Carrier Frequency Offsets
White Paper In this paper, a model is provided to quantify the effects of carrier frequency offsets in a multiuser OFDM uplink. Using an OFDM based uplink for the future cellular network has been controversial issue due to difficulties in time and frequency... [11 Apr 2007]
