Interference Characterization and Mitigation of 5.5 Mbps CCK WI-FI Signals

Author

Al-Banna, Ayham Z. ; Zhou, Xiaoguang ; Lee, Tae Ri ; LoCicero, Joseph L. ; Ucci, Donald R.

Author_Institution

Illinois Inst. of Technol., Chicago

fYear

2007

fDate

9-13 July 2007

Firstpage

1

Lastpage

8

Abstract

An exact power spectral density (PSD) expression is derived for IEEE 802.11b 5.5 Mbps signals using complementary code keying (CCK). The analytical result obtained is verified through computer simulation. The spectral signature of the 5.5 Mbps CCK- modulated signal is compared to the PSD of the Barker-spread Wi-Fi signals. The adjacent channel interference power resulting from the 5.5 Mbps CCK interferer is introduced and compared to that caused by Barker-spread signals. Adaptive antennas with tapped delay lines are used to mitigate the effect of these interference signals. Optimal ranges of the tapped delay lines are found such that performance is restored at minimum cost.

Keywords

antennas; modulation; radiofrequency interference; wireless LAN; Barker-spread Wi-Fi signals; CCK Wi-Fi signals; IEEE 802.11b; adaptive antennas; bit rate 5.5 Mbit/s; channel interference; complementary code keying; interference characterization; power spectral density; tapped delay lines; Adaptive arrays; Bandwidth; Communication system security; Cost function; Delay lines; FCC; Interchannel interference; Personal digital assistants; Phase modulation; Signal restoration;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Compatibility, 2007. EMC 2007. IEEE International Symposium on

Conference_Location

Honolulu, HI

Print_ISBN

1-4244-1349-4

Electronic_ISBN

1-4244-1350-8

Type

conf

DOI

10.1109/ISEMC.2007.25

Filename

4305605