2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring) 2021
DOI: 10.1109/vtc2021-spring51267.2021.9448713
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Improving Analog Zero-Forcing Null Depth with N-bit Vector Modulators in Multi-beam Phased Array Systems

Abstract: Multiantenna systems can increase the spatial reuse of the wireless spectrum by nulling the interfering directions. However, the efficiency of the spatial interference suppression is highly sensitive to errors in the progressive phase applied to the antenna elements. We examine the impact of one particular source of error resulting from the quantization of the analog beamforming weights. In particular, we focus on vector-modulator based RF beamforming system. To improve the quantization error, we propose a sli… Show more

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Cited by 2 publications
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“…In our method, the reference can be selected freely. Simulations for generating nulls with vector modulator phase shifter and similar calibration method was presented in [33]. A flow graph of the relative phase calibration is shown in the lower right side of Fig.…”
Section: B Relative Phase Calibration In Delay Domainmentioning
confidence: 99%
“…In our method, the reference can be selected freely. Simulations for generating nulls with vector modulator phase shifter and similar calibration method was presented in [33]. A flow graph of the relative phase calibration is shown in the lower right side of Fig.…”
Section: B Relative Phase Calibration In Delay Domainmentioning
confidence: 99%