Proc. IEEE Asilomar Conference on Signal, Systems and Computers, November 4-7, 2007, Pacific Grove, California.

Real-Time MIMO Discrete Multitone Transceiver Testbed

Alex G. Olson, Aditya Chopra, Yousof Mortazavi, Ian C. Wong and Brian L. Evans

Department of Electrical and Computer Engineering, Engineering Science Building, The University of Texas at Austin, Austin, TX 78712 USA - - - -

Paper - Slides - Slides in Office 2007 - Poster

Won Best Student Paper Award for the Architecture and Implementation Track

ADSL Research at UT Austin


Given a wireline transmitter/receiver pair with fixed parameters (modulation and coding methods, transmission, bandwidth, receiver noise floor, etc.) that achieves a certain bit rate on a single pair of wires, one might expect that using two pairs of wires (and two sets of transceivers) would double the bit rate. However, the presence of crosstalk induced by the coupling of the energy across the wire pairs may cause significant reduction in the expected bit rate. In this paper, we present a multiple-input multiple-output (MIMO) discrete multitone (DMT) system that achieves double the bit rate of a traditional single transmitter-receiver system when using 2 transmitters and 2 receivers operating over two wires. The improvement has been achieved both in desktop simulation and in a real-time testbed. The testbed also allows rapid exploration of many design tradeoffs in a DMT system.

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Last Updated 06/04/13.