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Saha, Swetank Kumar; Ghasempour, Yasaman; Haider, Muhammad Kumail; Siddiqui, Tariq; Melo, Paulo De; Somanchi, Neerad; Zakrajsek, Luke; Singh, Arjun; Torres, Owen; Uvaydov, Daniel; Jornet, Josep Miquel; Knightly, Edward W.; Koutsonikolas, Dimitrios; Pados, Dimitris A.; Sun, Zhi

doi:10.1145/3131473.3131479

Cited by 36 publications

(2 citation statements)

References 13 publications

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“…Hence, effective beam alignment techniques are necessary to establish a reliable link between terminals [8]. To overcome such challenges, an antenna array with a large number of elements is needed to electronically steer the directional beams towards desired directions in mmWave systems [9]- [11]. This is achieved by controlling the phase and magnitude of signals at each antenna based on beamforming techniques.…”

Section: Introductionmentioning

confidence: 99%

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Developing the First mmWave Fully-Connected Hybrid Beamformer With a Large Antenna Array

et al. 2020

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Millimeter wave (mmWave) systems with effective beamforming capability play a key role in fulfilling the high data-rate demands of current and future wireless technologies. Hybrid analog-todigital beamformers have been identified as a cost-effective and energy-efficient solution towards deploying such systems. Most of the existing hybrid beamforming architectures rely on a subconnected phase shifter network with a large number of antennas. Such approaches, however, cannot fully exploit the advantages of large arrays. On the other hand, the current fully-connected beamformers accommodate only a small number of antennas, which substantially limits their beamforming capabilities. In this paper, we present a mmWave hybrid beamformer testbed with a fully-connected network of phase shifters and adjustable attenuators and a large number of antenna elements. To our knowledge, this is the first platform that connects two RF inputs from the baseband to a 16× 8 antenna array, and it operates at 26 GHz with a 2 GHz bandwidth. It provides a wide scanning range of 60 • , and the flexibility to control both the phase and the amplitude of the signals between each of the RF chains and antennas. This beamforming platform can be used in both short and long-range communications with linear equivalent isotropically radiated power (EIRP) variation between 10 dBm and 60 dBm. In this paper, we present the design, calibration procedures and evaluations of such a complex system as well as discussions on the critical factors to consider for their practical implementation. INDEX TERMS Millimeter wave, Multiple-input multiple-output, fully-connected hybrid beamforming, phased array antenna, testbed.

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Section: Introductionmentioning

confidence: 99%

“…However, these systems are much more expensive and complex to build. Hence, most of the existing hybrid beamforming testbeds and products are based on the subconnected approaches [9], [12], [21]- [23].…”

Section: Introductionmentioning

confidence: 99%