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- W4385486550 abstract "This paper proposes a multibeam digital predistorter (DPD) that suppresses intercarrier interference caused by nonlinear distortions of power amplifiers (PAs) while reducing the power consumption of a multibeam array antenna transmitter. The proposed DPD reduces power consumption by allowing the final PAs of the array antenna transmitter to operate in a highly efficient nonlinear mode and compensating for the nonlinear distortions of the PAs with a unified dedicated DPD per subarray. Additionally, it provides the required high-quality signal transmission for high throughputs, such as realizing a 256-quadrature amplitude modulation (QAM) transmission instead of a 64-QAM transmission. Specifically, it adds an inverse-component signal to cancel the interference from an adjacent carrier of another beam. Consequently, it can suppress the intercarrier interference in the beam direction and improve the error vector magnitude (EVM) during the multibeam transmission, in which the frequency bands of the beams are adjacent. The experimental results obtained for two beams at 28.0 and 28.4 GHz demonstrate that, compared with the previous single-beam DPD, the proposed multibeam DPD can improve the EVM. Also, they demonstrate that the proposed DPD can achieve an EVM value of < 3%, which completely satisfies the 3GPP requirements for a 256-QAM transmission." @default.
- W4385486550 created "2023-08-03" @default.
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- W4385486550 date "2023-01-01" @default.
- W4385486550 modified "2023-09-23" @default.
- W4385486550 title "Multibeam Digital Predistorter with Intercarrier Interference Suppression for Millimeter-Wave Array Antenna Transmitters" @default.
- W4385486550 doi "https://doi.org/10.1587/transcom.2023ebp3006" @default.
- W4385486550 hasPublicationYear "2023" @default.
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