Title :
Active array beamforming using the frequency-response masking technique
Author :
Liu, Yongzhi ; Lin, Zhiping
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore
Abstract :
An active interleave linear array beamformer is proposed. Based on the concept of effective aperture and the frequency-response masking technique, the effective beampattern with a sharp transition band and low sidelobes can be synthesized with fewer sensor elements. Compared with other linear sparse active arrays, sidelobe level and grating lobes can be easily controlled by properly designed aperture functions. Computer simulations demonstrate the effectiveness of this beamformer.
Keywords :
aperture antennas; array signal processing; frequency response; active array beamforming; active interleave linear array beamformer; aperture functions; beampattern; frequency-response masking; grating lobes; linear sparse active arrays; sensor elements; sidelobe level; transition band; Apertures; Array signal processing; Control system synthesis; Finite impulse response filter; Frequency synthesizers; Gratings; Phased arrays; Piezoelectric transducers; Ultrasonic imaging; Ultrasonic transducers;
Conference_Titel :
Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on
Print_ISBN :
0-7803-8251-X
DOI :
10.1109/ISCAS.2004.1328717
