A fast, efficient approach to implementing SRDF techniques
A fast, efficient approach to implementing SRDF techniques
- Author(s): W. Featherstone and H.J. Strangeways
- DOI: 10.1049/cp:20000161
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- Author(s): W. Featherstone and H.J. Strangeways Source: 8th International Conference on High-Frequency Radio Systems and Techniques, 2000 p. 123 – 126
- Conference: 8th International Conference on High-Frequency Radio Systems and Techniques
- DOI: 10.1049/cp:20000161
- ISBN: 0 85296 727 6
- Location: Guildford, UK
- Conference date: 10-13 July 2000
- Format: PDF
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.
Inspec keywords: spectral analysis; radio receivers; ionospheric electromagnetic wave propagation; HF radio propagation; signal resolution; Newton-Raphson method; direction-of-arrival estimation; array signal processing
Subjects: Radio links and equipment; Signal processing and detection; Interpolation and function approximation (numerical analysis)
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