Title :
Raster-scanned wave-digital filter architectures for multi-beam 2D IIR broadband beamforming
Author :
Rajapaksha, N.T. ; Wijenayake, C. ; Madanayake, A. ; Bruton, L.T.
Author_Institution :
Dept. of ECE, Univ. of Akron, Akron, OH, USA
Abstract :
Two-dimensional (2D) beam filters find applications in highly-selective directional enhancement of spatio-temporal (ST) plane-waves (PWs). A 2D raster-scanned (RS) wave-digital filter (WDF) hardware architecture, using a uniform linear array (ULA) of sensors, based on a 2D LR-ladder prototype network is proposed for obtaining M independently-steerable broadband beams having adjustable selectivity. FPGA-based prototypes for 2,3 beams supporting upto 32 broadband sensors are as well as measured results, FPGA resource consumptions, and maximum speeds at various fixed-point precisions, are provided. On-chip verification of the M-beam 2D IIR beam WDF architecture leads to multi-beamforming in applications such as directional audio, multimedia, seismic, and ultrasonic signal processing.
Keywords :
IIR filters; field programmable gate arrays; 2D LR-ladder prototype network; FPGA-based prototype; broadband sensor; directional audio signal processing; independently-steerable broadband beam; multibeam 2D IIR broadband beamforming; multimedia signal processing; on-chip verification; raster-scanned wave-digital filter architectures; seismic signal processing; spatio-temporal plane-waves; ultrasonic signal processing; uniform linear array; Arrays; Broadband communication; Clocks; Delay; Field programmable gate arrays; Passband; Sensors;
Conference_Titel :
Microelectronics (ICM), 2010 International Conference on
Conference_Location :
Cairo
Print_ISBN :
978-1-61284-149-6
DOI :
10.1109/ICM.2010.5696086
