Optimal phase-shifter design to cancel RF interference in multi-antenna systems

Venkateswaran, Vijay; Veen, Alle-Jan van der

doi:10.1109/icassp.2010.5496292

Cited by 3 publications

(1 citation statement)

References 9 publications

(11 reference statements)

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“…Refs. [13], [14] explore the minimum mean square error (MMSE) hybrid receiver design and investigate the impact of analog-digital-converter (ADC) with different resolutions. Figure 2 compares the performance of the three structures for downlink transmission of single-cell multi-user (MU) massive MIMO.…”

Section: A Approximating the Optimal Beamformermentioning

confidence: 99%

Hybrid Beamforming for Massive MIMO: A Survey

et al. 2017

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Hybrid multiple-antenna transceivers, which combine large-dimensional analog pre/postprocessing with lowerdimensional digital processing, are the most promising approach for reducing the hardware cost and training overhead in massive MIMO systems. This paper provides a comprehensive survey of the various incarnations of such structures that have been proposed in the literature. We provide a taxonomy in terms of the required channel state information (CSI), namely whether the processing adapts to the instantaneous or the average (second-order) CSI; while the former provides somewhat better signal-to-noise and interference ratio, the latter has much lower overhead for CSI acquisition. We furthermore distinguish hardware structures of different complexities. Finally, we point out the special design aspects for operation at millimeter-wave frequencies. Index TermsHybrid beamforming, 5G, Millimeter-wave.

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Section: A Approximating the Optimal Beamformermentioning

confidence: 99%

Hybrid Beamforming for Massive MIMO: A Survey

et al. 2017

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Analog Beamforming in MIMO Communications With Phase Shift Networks and Online Channel Estimation

Venkateswaran

Veen

2010

IEEE Trans. Signal Process.

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369

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Abstract-In multiple-input multiple-output (MIMO) systems, the use of many radio frequency (RF) and analog-to-digital converter (ADC) chains at the receiver is costly. Analog beamformers operating in the RF domain can reduce the number of antenna signals to a feasible number of baseband channels. Subsequently, digital beamforming is used to capture the desired user signal. In this paper, we consider the design of the analog and digital beamforming coefficients, for the case of narrowband signals. We aim to cancel interfering signals in the analog domain, thus minimizing the required ADC resolution. For a given resolution, we will propose the optimal analog beamformer to minimize the mean squared error between the desired user and its receiver estimate. Practical analog beamformers employ only a quantized number of phase shifts. For this case, we propose a design technique to successively approximate the desired overall beamformer by a linear combination of implementable analog beamformers. Finally, an online channel estimation technique is introduced to estimate the required statistics of the wireless channel on which the optimal beamformers are based.Index Terms-ADC power consumption, analog beamforming, matching pursuit, passive RF phase shifters.

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