Title :
IEEE 802.11b WLAN capacity and performance measurements in channel with large delay spreads
Author :
Silvennoinen, Aki ; Karhima, T. ; Hall, Michael ; Haggman, Sven-Gustav
Author_Institution :
Commun. Lab., Helsinki Univ. of Technol., Espoo, Finland
Abstract :
IEEE 802.11x wireless local area network (WLAN) systems are quite popular in office indoor environment and urban outdoor environments but suburban or rural environments can still offer unexploited possibilities, especially for military communication purposes. The radio channels of these environments have large delay spreads that pose limitations for IEEE 802.11b signal usage. In this study IEEE 802.11b WLAN capacity and performance is evaluated based on measurements of two different commercial vendors´ WLAN products. Throughput and packet error ratio is studied as a function of excess delay. The radio channels are simulated using a radio channel simulator. We find that IEEE 802.11b WLAN systems´ capacity and performance decrease as excess delay increases, and the systems cannot efficiently operate in channels where the excess delays are larger than symbol duration.
Keywords :
IEEE standards; channel capacity; delays; error statistics; military communication; packet radio networks; telecommunication traffic; wireless LAN; IEEE 802.11b; WLAN; channel capacity; excess delay; large delay spreads; military communication; packet error ratio; performance measurements; radio channel simulator; symbol duration; throughput; wireless local area network; Bit rate; Delay; Indoor environments; Intelligent networks; Laboratories; Military communication; Military equipment; Spread spectrum communication; Throughput; Wireless LAN;
Conference_Titel :
Military Communications Conference, 2004. MILCOM 2004. 2004 IEEE
Print_ISBN :
0-7803-8847-X
DOI :
10.1109/MILCOM.2004.1494880