University of California, Los Angeles

MIMO Wireless Communications Research

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Overview mimo@ee.ucla.edu

UCLA MIMO-OFDM Overview Presentation                   Non-Engineer's Intro to MIMO & OFDM

Noting the tremendous advancements by researchers in the theoretical development of MIMO and space-time systems in general. The UCLA approach is a unique highly practical multidisciplinary approach specifically targeted at identifying and solving unique challenges associated with the actual implementation and realization of MIMO systems.  The ultimate goal of the program is to develop a complete 8x8 real-time MIMO OFDM testbed system in 2006. The testbed will be built around unique VLSI ASICs developed as part the same research and will be capable of achieving throughput rates of 1 Gbps. As such the work is extremely practical in nature and consists of three main tracks as follows:

  1. MIMO System Design

    -  Algorithmic development for an end to end system

  2. MIMO OFDM Testbed Development

    -  Three phase approach that starts with a non real-time SDR based approach and culminates in the Gbps 8x8 system. The testbeds will be used to validate (or disprove) theoretical results, and to establish the practical bounds on system performance.

  3. VLSI system research

    -  Investigate and develop novel VLSI architectures that can deliver the 100's of GOPS of processing power, required by broadband MIMO systems, with extreme power efficiency. 

Historical Note

MIMO research at UCLA was first carried out by the wireless integrated systems (WISR) group in 1999 with funding by the DARPA NGI program. The scope of the initial program was to investigate single carrier, DFE based, MIMO systems. Since 2001 we have been focused entirely on OFDM based MIMO systems. This work is for the most part supported by the ONR AINS program with other funding from industry and the NSF.

Currently Active & Recent Projects

The following is a listing of the currently active projects. For more information please contact us at mimo@ee.ucla.edu

MIMO OFDM Testbed & ExPerimental Studies

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MIMO OFDM System Performance Using a Unique High-Speed Testbed

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Design And Development of A 5.25GHz Software Defined Wireless OFDM Communication Platform

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A 5.25GHz Radio Transceiver for a MIMO Testbed

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Phase Noise Reduction in the MIMO OFDM Wireless Testbed

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I/Q Mismatch Cancellation for MIMO-OFDM Systems

 

ASIC & Hardware Components

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MIMO OFDM Mod. ASIC [pending]

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An 8 Mb/s QPSK/16QAM OFDM Receiver ASIC for Mobile Communications

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A Very Low Complexity Space-Time Block Decoder (STBD) ASIC for Wireless Systems

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Quantum Systolic Radios

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Compact MIMO OFDM Prototype Nodes

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MIMO OFDM Decoder ASIC

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A Low Power DS-CDMA RAKE Receiver Utilizing Resource Allocation Techniques

 

Theoretical & Algorithmic MIMO Research

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Minimum Word-Length Requirements for MIMO OFDM

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Synchronization Algorithms for Packet-Mode MIMO-OFDM Communications

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Theoretical Capacity of Wideband MIMO Systems & a DFE Based Single Carrier MIMO System

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Channel Estimation and Synchronization with Minimum Overhead for MIMO-OFDM Communications

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MIMO for DSSS Communication Systems

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Last updated: 12/30/03.