Title :
Filter bank based fractional delay filter implementation for widely accurate broadband steering vectors
Author :
Alrmah, Mohamed A. ; Weiss, Steven
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. of Strathclyde, Glasgow, UK
Abstract :
Applications such as broadband angle of arrival estimation require the implementation of accurate broadband steering vectors, which generally rely on fractional delay filter designs. These designs commonly exhibit a rapidly decreasing performance as the Nyquist rate is approached. To overcome this, we propose a filter bank based approach, where standard fractional delay filters operate on a series of frequency-shifted oversampled subband signals, such that they appear in the filter´s lowpass region. Simulations demonstrate the appeal of this approach.
Keywords :
channel bank filters; delay filters; direction-of-arrival estimation; signal sampling; Nyquist rate; broadband angle of arrival estimation; broadband steering vectors; filter bank based fractional delay filter design; frequency-shifted oversampled subband signals; low-pass filter region; Approximation methods; Arrays; Broadband communication; Delays; Frequency modulation; Polynomials; Vectors;
Conference_Titel :
Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP), 2013 IEEE 5th International Workshop on
Conference_Location :
St. Martin
Print_ISBN :
978-1-4673-3144-9
DOI :
10.1109/CAMSAP.2013.6714075