Frequency-Invariant Beam Steering Based on FIR-Filters
| Autor: | Alexey A. Erokhin, Yury P. Salomatov, Evgeniy R. Gafarov |
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| Rok vydání: | 2020 |
| Předmět: |
Beamforming
Beam diameter Frequency response Finite impulse response Computer science Acoustics 020208 electrical & electronic engineering Beam steering 020206 networking & telecommunications 02 engineering and technology Antenna array symbols.namesake Narrowband Fourier transform 0202 electrical engineering electronic engineering information engineering symbols Hardware_ARITHMETICANDLOGICSTRUCTURES Electrical and Electronic Engineering Computer Science::Information Theory |
| Zdroj: | Radioelectronics and Communications Systems. 63:521-531 |
| ISSN: | 1934-8061 0735-2727 |
| DOI: | 10.3103/s0735272720100027 |
| Popis: | Conventional narrowband beamforming methods are not effective for wideband antenna arrays. Radiation pattern of such array has various beam width over the frequency. Existing frequency-invariant beamforming methods using finite impulse response filters (FIR-filters) can solve this problem. FIR-filters provide frequency response required for frequency-independent properties of the array radiation pattern but their common feature is a high computational complexity. In this paper, we present the fixed frequency-invariant beamforming method that does not require minimizing functions or the Fourier transform. The beam steering is achieved by using FIR-filters with different slope of the frequency response. The proposed approach is based on the FIR-filters synthesis with special frequency characteristics. The numerical results compared with the existing frequency-invariant beamforming method are shown. |
| Databáze: | OpenAIRE |
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