Title :
A broadband beamformer for millimeter-wave systems using sub-band sampling
Author :
Seong-Sik Jeon ; Ji-Yong Park ; Yuanxun Wang ; Itoh, T.
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
Abstract :
In this paper, a broadband beamforming system for millimeter-waive systems is proposed. DOA is estimated by sampling only part of signal spectrum, thus the beamformer system does not require high speed sampling rate of A/Ds. In addition, an I/Q vector attenuation scheme was used for the IF weighting process. For the weighting process, a balanced structure of a reflection type variable attenuator was used in order to obtain a linear phase response within 500 MHz bandwidth at IF of 2.75 GHz.
Keywords :
antenna accessories; array signal processing; direction-of-arrival estimation; microwave links; millimetre wave antenna arrays; signal sampling; 2.75 GHz; 500 MHz; DOA estimation; EHF; I/Q vector attenuation scheme; IF weighting process; MM-wave systems; broadband beamforming system; linear phase response; millimeter-wave systems; reflection type variable attenuator; sub-band sampling; Array signal processing; Attenuation; Attenuators; Bandwidth; Direction of arrival estimation; Optical reflection; Sampling methods; Signal processing; Signal sampling; Vectors;
Conference_Titel :
Microwave Symposium Digest, 2003 IEEE MTT-S International
Print_ISBN :
0-7803-7695-1
DOI :
10.1109/MWSYM.2003.1211005
