Event Details
Capacity And Error Probability Analysis Of Space-Time Block Codes Over Fading Channels
Presenter: Dr. Aaron T. Gulliver
Supervisor:
Date: Thu, January 15, 2004
Time: 14:30:00 - 15:30:00
Place: EOW 430
ABSTRACT
Abstract:
The growing demand for high-rate data services over wireless channels motivates the design of multiple antenna wireless systems to transmit increased data rates without substantial bandwidth expansion. As a part of the UTRA (Universal Terrestrial Radio Access) FDD (Frequency Division Duplex) standard, space-time block codes (STBC) have been proposed for use in the downlink of Direct Sequence Code Division Multiple Access (DS-CDMA) systems to provide transmit diversity. Significant research has been conducted on STBC for DS-CDMA. First presented in for 2 transmit antennas, and generalized for an arbitrary number of transmit antennas, STBC is a remarkable technique which can provide full diversity gain with very low computational complexity.
In this talk, the capacity and error probability of space-time block codes (STBC) are considered for a DS-CDMA system with PAM/PSK/QAM modulation in fading channels. The approach is based on an equivalent scalar AWGN (additive white Gaussian noise) channel with a channel gain proportional to the Frobenius norm of the matrix channel for the STBC. Using this effective channel, capacity and probability of error expressions are derived for PSK/PAM/QAM modulation with STBC. Rayleigh, Ricean and Nakagami fading channels are considered. These results are extended to obtain the capacity and probability of error for a multiuser direct sequence code division multiple access (DS-CDMA) system employing STBC.
For further information please contact:
Hao Zhang hzhang@ece.uvic.ca