Title :
A fast, efficient approach to implementing SRDF techniques
Author :
Featherstone, W. ; Strangeways, H.J.
Author_Institution :
Motorola, Swindon, UK
Abstract :
Superresolution direction finding (SRDF) involves estimating the directions of arrival of multiple signals, generally utilising a multi-channel receiver and a suitable antenna array. A principal advantage of SRDF techniques is their ability to resolve two or more signals impinging on the array when their angular separation is less than the its natural beamwidth. This paper has addressed the efficient implementation of weighted spectrum type SRDF techniques. It has been shown that the Newton-Raphson root-finding technique can be applied to this problem. Moreover, when applied to weighted spectrum type methods, it provides a fast, accurate, computationally efficient peak-finding approach. This has been validated using both simulated data and real data collected in the HF band
Keywords :
HF radio propagation; Newton-Raphson method; array signal processing; direction-of-arrival estimation; ionospheric electromagnetic wave propagation; radio receivers; signal resolution; spectral analysis; DOA estimation; HF band; Newton-Raphson root-finding technique; SRDF techniques; accurate approach; angular separation; antenna array; beamwidth; computationally efficient peak-finding approach; directions of arrival estimation; fast approach; ionosphere; multi-channel receiver; multiple signals; real data; simulated data; superresolution direction finding; weighted spectrum;
Conference_Titel :
HF Radio Systems and Techniques, 2000. Eighth International Conference on (IEE Conf. Publ. No. 474)
Conference_Location :
Guildford
Print_ISBN :
0-85296-727-6
DOI :
10.1049/cp:20000161