A single RF channel smart antenna receiver array with digital beamforming for WLAN application

Author

Goshi, Darren S. ; Wang, Yuanxun ; Itoh, Tatsuo

Author_Institution

Dept. of Electr. Eng., California Univ., USA

Volume

2

fYear

2004

fDate

6-11 June 2004

Firstpage

1257

Abstract

A low-noise smart antenna array with adaptive beamforming is proposed. The system employs a Spatial Multiplexing of Local Elements (SMILE) scheme to reduce N RF-channels to one, reducing the amount of costly RF hardware by a factor of N. The sampling rate must be higher than the signal bandwidth based on the Nyquist criterion to ensure proper restoration of the original signal. The multiplexing network is implemented with low-noise amplifier switches utilizing NE32485C HJFETs and a non-conventional feed network. Switching is achieved at 20 MHz allowing up to 10 Mbps reception. Beamforming and digital data demodulation is performed to validate the system.

Keywords

Nyquist criterion; adaptive antenna arrays; antenna feeds; array signal processing; demodulation; field effect transistor switches; multiplexing; wireless LAN; 20 MHz; HJFET; Nyquist criterion; RF hardware; WLAN application; digital beamforming; digital data demodulation; feed network; low-noise amplifier switches; low-noise smart antenna array; multiplexed local elements; sampling rate; signal bandwidth; single RF channel smart antenna receiver array; spatial multiplexing; wireless local area network application; Adaptive arrays; Antenna arrays; Array signal processing; Bandwidth; Hardware; RF signals; Radio frequency; Receiving antennas; Sampling methods; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2004 IEEE MTT-S International

ISSN

0149-645X

Print_ISBN

0-7803-8331-1

Type

conf

DOI

10.1109/MWSYM.2004.1339217

Filename

1339217