Title :
A Method of Improved Broadband Beamforming and Implementation on FPGA
Author :
Jie, Shao ; Ning, Ye
Author_Institution :
Coll. of Inf. Sci. & Technol., Nanjing Univ. of Aeronaut. & Astronaut.
Abstract :
In this paper, we presented an improved approach to design a broadband beamforming in time domain and its architecture on FPGA. The FIR digital filter with rigid linear phase was obtained by linearly constrained LMS algorithm. An iterative algorithm was used to enhance the performance of the FIR digital filter through adaptively optimizing cost function according to amplitude error function. Simulational and experimental results based on FPGA for a 10-element uniform linear array showed that the adaptive algorithm proposed in this paper was effective, can satisfied the real time requirement of underwater high speed signal processing. Moreover, this beamforming method was valuable in practical engineering in sonar systems, and can be applied to arbitrary array
Keywords :
FIR filters; array signal processing; field programmable gate arrays; iterative methods; least mean squares methods; linear phase filters; time-domain analysis; 10-element uniform linear array; FIR digital filter; FPGA; adaptive algorithm; amplitude error function; broadband beamforming design; cost function; field programmable gate array; finite impulse response; iterative algorithm; least mean squares; linearly constrained LMS algorithm; rigid linear phase; sonar system; time domain analysis; underwater high speed signal processing; Adaptive algorithm; Adaptive arrays; Array signal processing; Cost function; Digital filters; Field programmable gate arrays; Finite impulse response filter; Iterative algorithms; Least squares approximation; Signal processing algorithms;
Conference_Titel :
Communications, Circuits and Systems Proceedings, 2006 International Conference on
Conference_Location :
Guilin
Print_ISBN :
0-7803-9584-0
Electronic_ISBN :
0-7803-9585-9
DOI :
10.1109/ICCCAS.2006.284702
