Title :
Maximising signal strength inside buildings for wireless LAN systems using OFDM
Author :
Lawrey, Eric ; Kikkert, C.J.
Author_Institution :
Electr. & Comput. Eng., James Cook Univ., Townsville, Qld., Australia
Abstract :
Propagation inside buildings suffer from large shadowing and high multipath effects. This is a serious problem for Wireless Local Area Network (WLAN) systems. OFDM has a high multipath tolerance and this paper shows how this can be used to overcome the problems due to shadowing. OFDM allows a base station to transmit and receive the same signal at the same frequency from multiple locations, at a low cost and without the detrimental effects of Inter-Symbol Interference (ISI). The reduced shadowing and path loss allows: an increased system capacity for such a multi-transceiver WLAN cell, or a decrease in intercellular interference in a cellular WLAN
Keywords :
OFDM modulation; UHF radio propagation; cellular radio; digital radio; indoor radio; interference suppression; losses; microwave propagation; multipath channels; radiofrequency interference; wireless LAN; ISI elimination; OFDM; WLAN systems; building interiors; cellular WLAN; indoor propagation; intercellular interference reduction; multi-transceiver WLAN cell; multipath effects; multipath tolerance; path loss reduction; shadowing; signal strength maximisation; system capacity improvement; wireless LAN systems; Delay; Femtocell networks; Intersymbol interference; OFDM; Optical transmitters; Physical layer; Radio transmitters; Repeaters; Shadow mapping; Wireless LAN;
Conference_Titel :
Microwave Conference, 2000 Asia-Pacific
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6435-X
DOI :
10.1109/APMC.2000.925779
