Title :
Broadband beamforming using fan filter structures with low number of antenna elements
Author :
Ghavami, Mohammad ; Kohno, Ryuji
Author_Institution :
Fac. of Eng., Yokohama Nat. Univ., Japan
Abstract :
A broadband and computationally efficient beamformer based on fan filters with a reduced number of antenna elements is proposed. The basic idea is the design of two-dimensional filters by application of a transformation to a one-dimensional low-pass filter that has only one adjustable parameter. The modified frequency response of the fan filter makes it possible to use a lesser number of taps and antenna elements. In the partially adaptive interference canceller scheme, interference in the main lobe as well as the side lobe of the directional pattern are suppressed effectively. The adjustment of the adaptive parameters is done by an LMS algorithm and computer simulations are performed to demonstrate the results
Keywords :
adaptive antenna arrays; antenna radiation patterns; array signal processing; filtering theory; frequency response; interference suppression; least mean squares methods; low-pass filters; two-dimensional digital filters; LMS algorithm; antenna elements; broadband beamforming; computer simulations; directional pattern; fan filter structures; frequency response; interference suppression; main lobe; one-dimensional low-pass filter; partially adaptive interference canceller; side lobe; two-dimensional filters; Adaptive arrays; Adaptive filters; Antenna accessories; Antenna arrays; Array signal processing; Broadband antennas; Frequency response; IIR filters; Interference suppression; Signal design;
Conference_Titel :
Personal Wireless Communication, 1999 IEEE International Conference on
Conference_Location :
Jaipur
Print_ISBN :
0-7803-4912-1
DOI :
10.1109/ICPWC.1999.759586
