Low-cost and accurate broadband beamforming based on narrowband sub-arrays

Alshammary, Abdullah and Weiss, Stephan (2016) Low-cost and accurate broadband beamforming based on narrowband sub-arrays. In: 20th International ITG Workshop on Smart Antennas WSA 2016. VDE, DEU. ISBN 978-3-8007-4177-9

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    Abstract

    Simplified broadband beamformers can be constructed by sharing a single tapped-delay-line within a narrowband subarray. This paper discusses the use of fractional delay filters to a steering in the digital domain. For the narrowband subarrays, an optimisation approach is proposed to maintain an off-broadside look direction constraint as best as possible across a given frequency range. We demonstrate the advantage that this approach has for generating beamformers with accurate off-broadside look direction compared to a benchmark.