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Design methodology of an analog 9-beam squint-free wideband IF multi-beamformer for mmW applications

Show simple item record Ariyarathna, V Udayanga, N Madanayake, A Perera, SM Belostotski, L Cintra, RJ 2018-08-01T21:20:31Z 2018-08-01T21:20:31Z 2017
dc.description.abstract An intermediate frequency (IF) squinting-free multi-beamforming method is proposed for multi-antenna systems. The proposed approach uses a low-complexity factorization of a true-time-delay (TTD) multi-beam matrix, which is proposed to be realized using an analog integrated circuits approach. A TTD realization of multi-beams at intermediate frequency is achieved following amplification and synchronous down-conversion via the proposed Delay Vandermonde Matrix (DVM) in which matrix elements correspond to the compound phase compensation required for squint-free steering of each radio-frequency beam. True-time-delays are proposed to be efficiently realized on-chip by applying a sparse factorization to the DVM, which leads to a low circuit complexity implementation requiring a significantly lower number of TTD blocks and phase compensations compared to an equivalent direct implementation for a given N number of beams. The proposed method, for 9- beams, leads to a 60% reduction of analog integrated circuit based TTD blocks and phase compensators. The TTD blocks can be realized on chip using active-RC based integrated analog all-pass filters. The proposed multi-beam algorithm and circuit structure is simulated within the frequency range 55-65 GHz to demonstrate squinting-free wide-band multi-beams at millimeter wave carrier frequencies for emerging 5G applications. en_US
dc.language.iso en en_US
dc.subject Delay Vandermonde Matrix, Analog beamforming, Multi-beams, True-time-delay. en_US
dc.title Design methodology of an analog 9-beam squint-free wideband IF multi-beamformer for mmW applications en_US
dc.type Conference-Abstract en_US
dc.identifier.year 2017 en_US
dc.identifier.conference Moratuwa Engineering Research Conference - MERCon 2017 en_US Moratuwa, Sri Lanka en_US en_US en_US en_US en_US en_US en_US

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