Digital beamforming for smart antennas

Author

Nuteson, T.W. ; Mitchell, G.S.

Author_Institution

The Aerospace Corp., Chantilly, VA, USA

Volume

1

fYear

2001

fDate

20-24 May 2001

Firstpage

125

Abstract

An 8-channel digital phased array antenna (PAA) is designed and evaluated for a smart antenna application in the cellular PCS band (1850 MHz to 1990 MHz). Each channel is digitized at the RF carrier frequency using bandpass sampling clocking up to 1.5 Gsps with a 140 MHz bandwidth. The beamforming and additional signal processing is implemented digitally using field programmable gate arrays (FPGAs). This paper characterizes the PAA system for effects on loading analog-to-digital converters (ADCs) including automatic gain control (AGC) techniques and cochannel interference.

Keywords

UHF antennas; adaptive antenna arrays; analogue-digital conversion; antenna phased arrays; array signal processing; automatic gain control; cellular radio; cochannel interference; field programmable gate arrays; 140 MHz; 1850 to 1990 MHz; 8-channel digital phased array antenna; ADC loading; AGC techniques; FPGAs; analog-to-digital converters; automatic gain control techniques; bandpass sampling; cellular PCS band; cochannel interference; digital beamforming; field programmable gate arrays; signal processing; smart antennas; Antenna arrays; Array signal processing; Bandwidth; Clocks; Field programmable analog arrays; Field programmable gate arrays; Personal communication networks; Phased arrays; Radio frequency; Signal sampling;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2001 IEEE MTT-S International

Conference_Location

Phoenix, AZ, USA

ISSN

0149-645X

Print_ISBN

0-7803-6538-0

Type

conf

DOI

10.1109/MWSYM.2001.966854

Filename

966854