multiple input multiple output technique

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An Analysis of MIMO Techniques for Mobile WiMAX Systems

Multiple Input Multiple Output MIMO techniques are an essential part of the IEEE 802.16e - 2005 specifications, which form the basis of mobile WiMAX systems. This paper discusses the basic tradeoffs between diversity, interference cancellation and spatial multiplexing in MIMO systems, and the authors compare Optimum Combining OC, Maximum-Ratio combining...

Tags: Mobile, Specification, MIMO, IEEE, Analysis, Universitat Pompeu Fabra, Multiple Input Multiple Output Technique, WiMAX, Wi-Fi, Wireless And Mobility

White papers 2008-03-11

Diversity, Interference Cancellation and Spatial Multiplexing in MIMO Mobile WiMAX Systems

Multiple Input Multiple Output MIMO techniques are an essential part of the IEEE 802.16e - 2005 specifications, which form the basis of mobile WiMAX systems. This paper first discusses the tradeoffs between diversity, interference cancellation and spatial multiplexing in MIMO systems, and it compare Optimum Combining OC, Maximum-Ratio Combining MRC...

Tags: Stanford University, MIMO, Interference Cancellation, Multiple Input Multiple Output Technique, WiMAX, Wi-Fi, Wireless And Mobility

White papers 2007-01-19

Additional Resources

A Cooperative MAC for Distributed Space-Time Coding in an IEEE 802.16 Network

In the next-generation WiMAX system, cooperative communication is being considered as an advanced technique to increase the throughput and improve the signal quality. In a cooperative scenario, multiple stations can jointly emulate the antenna elements of a multi-input multi-output MIMO system in a distributed fashion. Unlike conventional space-time coding STC...

Tags: MAC, Polytechnic University, IEEE 802.16, WiMAX, Wi-Fi, Wireless And Mobility

White papers 2009-10-07

Multi-User Adaptive Resource Allocation Scheme for WLAN OFDM-MIMO Transmission

Orthogonal Frequency Division Multiplexing OFDM has recently been proposed for use in high data-rate wireless systems. OFDM has an important property of spectrum utilization technique that distributes each tone, which is orthogonal with every other tone. The system capacity can be significantly improved by multiple transmit and receive antennas that...

Tags: WLAN, MIMO, Allocation, Wireless, PSG College Of Technology, OFDM, Wireless LANs, LANs, Wi-Fi, Wireless And Mobility, Networking

White papers 2008-08-25

AutoMailMerge Plug-in 1.5 (Windows)

AutoMailMerge™ is an advanced plug-in for Adobe® Acrobat® software for performing mail merge processing. Mail merge is a computer term describing the production of multiple and potentially large numbers of documents from a single template form and a structured data source. This technique is used to create personalized letters, documents,...

Tags: Data Source, Adobe PDF, Microsoft Windows, Mail Merge, AutoMailMerge™

Software downloads 2008-07-20

Everything you've read about Vista DRM is wrong (Part 1)

Last month, I wrote about the FUD surrounding Windows Vista and DRM. The FUDmaster is Peter Gutmann, a New Zealand researcher who wrote a paper last December that made a series of outrageous and inflammatory claims about Windows Vista. Since then, Gutmann has expanded the paper to more than four...

Tags: Monitor, Digital-rights Management, Driver, Microsoft Windows Vista, Video, Microsoft Corp., FUDmaster, Peter Gutmann, Microsoft Windows Vista (Longhorn), Corporate Communications, Microsoft Windows, Operating Systems, Software, Marketing, Ed Bott

Blog posts 2007-09-16

Transmit Optimization for MIMO-OFDM With Delay-Constrained and No-Delay-Constrained Traffic

This paper studies low-complexity power control schemes to approach the capacity limits of Multiple-Input Multiple-Output Orthogonal-Frequency-Division-Multiplexing (MIMO-OFDM) channels under the assumption that perfect Channel State Information CSI is available at both the transmitter and the receiver. Two notions of channel capacity limit are considered, namely, the ergodic capacity for variable-rate...

Tags: Optimization, Capacity, MIMO-OFDM

White papers 2006-08-01

Spatial Multiplexing for Outdoor MIMO-OFDM Systems With Limited Feedback Constraint

This paper proposes a spatial multiplexing technique for the downlink of a Multiple-Input-Multiple-Output MIMO Orthogonal-Frequency-Division-Multiplexing OFDM system. For outdoor environments with a limited angular spread at the base station, the proposed technique is able to separate the users' streams through a joint spatial processing at both the transmitter and the...

Tags: Technique, Uppsala University, MIMO-OFDM, Productivity, OFDM, Wireless

White papers 2006-02-22

Adaptive Channel SVD Estimation for MIMO-OFDM Systems

In this paper an adaptive estimation algorithm for channel matrix singular value decomposition SVD in multiple-input multiple-output MIMO orthogonal frequency division multiplexing OFDM systems is proposed. The SVD method is an efficient approach to design space-time coding/decoding and detection algorithms in MIMO-OFDM systems. However, the SVD estimation may involve complex...

Tags: Algorithm, MIMO-OFDM, University Of Toronto, Singular Value Decomposition Method, OFDM, Engineering, Wireless

White papers 2005-05-07

Channel Capacity of TDD-OFDM-MIMO for Multiple Access Points in a Wireless Single-Frequency-Network

The Multiple-Input-Multiple-Output MIMO technique is the most attractive candidate to improve the spectrum efficiency in the next generation wire-less communication systems. However, the efficiency of MIMO techniques reduces in the Line Of Sight LOS environments. This paper proposes a new MIMO data transmission scheme, which combines Single-Frequency-Network SFN with TDD-OFDM-MIMO...

Tags: Environment, MIMO, Springer Science+Business Media, Access Point, Channel Capacity, Productivity, Wireless

White papers 2005-04-28