Wideband overlay in IEEE 802.11 WLAN systems

Author

Oppermann, Ian

Author_Institution

Centre for Wireless Commun., Oulu, Finland

Volume

2

fYear

2002

fDate

2-5 Sept. 2002

Firstpage

608

Abstract

This paper examines the operation of IEEE 802.11 WLAN systems with a wideband overlay. The overlay is a DS-SS signal operating at 11 Mcps which utilises complex valued spreading sequences derived from the sequence used for the underlay system. The overlay sequence is orthogonal to the original sequence and has the same quasi-ideal auto-correlation (AC) properties. The overlay system examined uses a signal with is 10 dB lower in power than the underlay signal and offers 2 Mbps. The overlay signal can only be detected by receivers "tuned" to the complex spreading sequence. Receivers tuned to the original binary sequence are substantially unaffected by the overlay.

Keywords

IEEE standards; broadband networks; correlation theory; pseudonoise codes; radio receivers; spread spectrum communication; telecommunication standards; wireless LAN; 11 MHz; 2 Mbit/s; DS-SS signal; IEEE 802.11 WLAN systems; complex spreading sequences; quasi-ideal auto-correlation properties; receivers; spread spectrum; underlay system; wideband overlay; Autocorrelation; Delay; Fading; Interference; Multipath channels; RAKE receivers; Spread spectrum communication; Standards development; Wideband; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Spread Spectrum Techniques and Applications, 2002 IEEE Seventh International Symposium on

Conference_Location

Prague, Czech Republic

Print_ISBN

0-7803-7627-7

Type

conf

DOI

10.1109/ISSSTA.2002.1048614

Filename

1048614