Constant-Beamwidth Beamforming with Concentric Ring Arrays
| Autor: | Baruch Berdugo, Avital Kleiman, Israel Cohen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Beamforming
Computer science Acoustics Attenuation Chemical technology Array processing White noise TP1-1185 concentric ring array Biochemistry Directivity Sonar Atomic and Molecular Physics and Optics Article Analytical Chemistry law.invention Beamwidth array processing law constant-beamwidth beamformer Electrical and Electronic Engineering Radar circular sensor array Instrumentation |
| Zdroj: | Sensors, Vol 21, Iss 7253, p 7253 (2021) Sensors (Basel, Switzerland) Sensors Volume 21 Issue 21 |
| ISSN: | 1424-8220 |
| Popis: | Designing beampatterns with constant beamwidth over a wide range of frequencies is useful in many applications in speech, radar, sonar and communication. In this paper, we design constant-beamwidth beamformers for concentric ring arrays. The proposed beamformers utilize the circular geometry to provide improved beamwidth consistency compared to beamformers which are designed for linear sensor arrays of the same order. In the proposed configuration, all sensors on each ring share the same weight value. This constraint significantly simplifies the beamformers and reduces the hardware and computational resources required in a physical setup. Furthermore, a theoretical justification of the beamforming method is provided. We demonstrate the advantages of the proposed beamformers compared to the one-dimensional configuration in terms of directivity index, white noise gain and sidelobe attenuation. |
| Databáze: | OpenAIRE |
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