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STAMOULIS AND AL-DHAHIR, "IMPACT OF SPACE-TIME BLOCK CODES ON 802.11 NETWORK THROUGHPUT" 1 Impact of Space-Time Block Codes on 802.11 Network Throughput
 

Summary: STAMOULIS AND AL-DHAHIR, "IMPACT OF SPACE-TIME BLOCK CODES ON 802.11 NETWORK THROUGHPUT" 1
Impact of Space-Time Block Codes on 802.11 Network Throughput
Anastasios Stamoulis and Naofal Al-Dhahir
AT&T Shannon Laboratory, Florham Park, NJ

as,naofalí @research.att.com
Contact Author is Naofal Al-Dhahir, AT&T Shannon Lab, Bldg. 103, Rm C289, 180 Park Avenue, Florham Park, NJ 07932.
T:(973)360-8407. F:(973)360-8178.
December 15, 2001 Submitted to IEEE Wireless Communications
STAMOULIS AND AL-DHAHIR, "IMPACT OF SPACE-TIME BLOCK CODES ON 802.11 NETWORK THROUGHPUT" 2
Abstract
Space-Time Block Codes (STBC) represent a recent, exciting development in the field of physical layer (PHY)
data transmission. By employing more than one antenna at the transmitter, and by properly coding data across the
transmit antennas, STBC-equipped PHYs promise increased data rates with minimal decoding complexity at the
receiver. This article presents a comprehensive study of how the STBC gains at the PHY translate to significant
network performance improvement in 802.11a Wireless LANs. We base our study on a detailed, across-all-layers,
simulation of an 802.11a system; we have extended the ns simulator with an implementation of the 802.11a PHY,
which allows us to assess the impact of STBC not only at the PHY layer, but at the higher layers as well. An
extensive set of simulations illustrates the merits of STBC, and sheds light on how performance can be improved
for TCP traffic. Essentially, STBC presents to TCP a "smoother" wireless channel; the latter phenomenon is

  

Source: Al-Dhahir, Naofal - Department of Electrical Engineering, University of Texas at Dallas

 

Collections: Engineering