Array beamforming for slow FH spread-spectrum WLANs

Author

Iltis, Ronald A.

Author_Institution

Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA

Volume

2

fYear

2002

fDate

3-6 Nov. 2002

Firstpage

1683

Abstract

A beamforming algorithm is presented for slow frequency-hopping wireless LAN which does not require prior knowledge of direction-of-arrival. The algorithm is motivated by Bluetooth and IEEE 802.11 FH networks, in which training sequences are transmitted to establish connections. Using prior knowledge of the training sequence, or post-beamforming data decisions, it is shown that correlation matrices containing interference-only and interference-plus-signal are readily formed. Established SNR maximization techniques are then employed to jointly suppress interference spatially, and beamform in the direction of the desired signal.

Keywords

Bluetooth; adaptive antenna arrays; array signal processing; correlation methods; frequency hop communication; interference suppression; matrix algebra; spread spectrum communication; wireless LAN; Bluetooth; IEEE 802.11; SNR maximization; WLAN; array beamforming; correlation matrices; interference-only matrices; interference-plus-signal matrices; post-beamforming data decisions; prior knowledge; slow FH spread-spectrum communication; slow frequency-hopping; smart antennas; spatial interference suppression; training sequences; wireless LAN; Array signal processing; Calibration; Frequency shift keying; Frequency synchronization; Jamming; Matched filters; Phase noise; Spread spectrum communication; Tracking loops; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems and Computers, 2002. Conference Record of the Thirty-Sixth Asilomar Conference on

Conference_Location

Pacific Grove, CA, USA

ISSN

1058-6393

Print_ISBN

0-7803-7576-9

Type

conf

DOI

10.1109/ACSSC.2002.1197062

Filename

1197062