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Proceedings Paper

Performance of DS-CDMA protocols in wireless LANs
Author(s): Mital Parikh; Prachee Sharma; Rahul Garg; Kavitha Chandra; Charles Thompson
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Paper Abstract

The performance of direct-sequence code-division multiple access (DS-CDMA) systems in indoor wireless channels is presented. TCP traffic, channel noise and signal characteristics are measured using commercial products that implement the IEEE 802.11b DS-CDMA standard. The measured throughputs for a low density mobile network are typically around $4.2$ Mbps when one of the two end-systems is on the wired segment. Multipath interference is shown to contribute to significant degradation in TCP performance. Packet loss rates ranging from $0.02$ to $0.2$ percent are observed in line-of-sight conditions. The BER performance of DS-CDMA is estimated using an image source based channel model of the rectangular room to compute the spatial variation of the channel impulse response. These impulse responses provide a quantitative measure of the system performance and provide estimates of signal power levels required for supporting high data rates in channels influenced by multipath interference.

Paper Details

Date Published: 1 July 2002
PDF: 12 pages
Proc. SPIE 4865, Internet Performance and Control of Network Systems III, (1 July 2002); doi: 10.1117/12.473392
Show Author Affiliations
Mital Parikh, Univ. of Massachusetts/Lowell (United States)
Prachee Sharma, Univ. of Massachusetts/Lowell (United States)
Rahul Garg, Univ. of Massachusetts/Lowell (United States)
Kavitha Chandra, Univ. of Massachusetts/Lowell (United States)
Charles Thompson, Univ. of Massachusetts/Lowell (United States)

Published in SPIE Proceedings Vol. 4865:
Internet Performance and Control of Network Systems III
Robert D. van der Mei; Frank Huebner, Editor(s)

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