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   Articles with "power scaling" as a keyword



Optimizing uplink massive MIMO: a proficient analysis of BER and spectral efficiency with power scaling and interference cancellation using MRC, ZF and RZF techniques

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recommendations! Published in 2025 at "Physica Scripta"

DOI: 10.1088/1402-4896/adc85a

Abstract: In Multiple Input Multiple Output (MIMO) wireless communication systems, the number of antennas at both transmitter and receiver significantly influences spatial multiplexing and diversity gain, enhancing communication reliability. Massive MIMO systems, characterized by large antenna… read more here.

Keywords: power scaling; massive mimo; mimo; rzf ... See more keywords

Exploring the power scaling of the cryogenic 946 nm monolithic laser

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recommendations! Published in 2018 at "Laser Physics Letters"

DOI: 10.1088/1612-202x/aac357

Abstract: The criterion for achieving power scaling of the cryogenically cooled monolithic 946 nm laser is investigated by varying crystal length. Theoretical analysis of the mode-to-pump size matching indicates that the optimal power can be obtained… read more here.

Keywords: power scaling; laser; power; exploring power ... See more keywords
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Power scaling of narrow-linewidth mid-IR spherical microlasers

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recommendations! Published in 2018 at "Laser Physics Letters"

DOI: 10.1088/1612-202x/aac5c8

Abstract: We discuss issues re: power scaling of mid-IR Er:ZBLAN spherical microlasers and demonstrate achievement of near-milliwatt power levels from a narrow-linewidth (< 50 pm) 2.71 um laser source based on an Er:ZBLAN microlaser. read more here.

Keywords: power scaling; linewidth mid; power; spherical microlasers ... See more keywords

Vector Perturbation Precoding Under Imperfect CSI and Inaccurate Power Scaling Factors

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recommendations! Published in 2019 at "IEEE Access"

DOI: 10.1109/access.2019.2926228

Abstract: We focus on the design of vector perturbation (VP) precoding for multiuser multiple-input-single-output (MU-MISO) broadcast channel systems where the centralized transmitter equipped with multiple antennas and communicates simultaneously to multiple single-antenna receivers. While conventional VP… read more here.

Keywords: scaling factors; power; csi; vector perturbation ... See more keywords

Partial Perturbation to Alleviate the Performance Degradation of Vector Perturbation With Inaccurate Power Scaling Factors

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recommendations! Published in 2021 at "IEEE Transactions on Broadcasting"

DOI: 10.1109/tbc.2020.2977514

Abstract: For multi-user multiple-input-multiple-output (MU-MIMO) system, transmitter utilizes a pre-equalizer based precoding to cancel inter-stream interference for parallel transmission with the aid of accurate feedback of channel state information (CSI) from all receivers. The correct power… read more here.

Keywords: performance degradation; performance; power; inaccurate power ... See more keywords

Thermal lensing, heat loading and power scaling of mid-infrared Er:CaF2 lasers.

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recommendations! Published in 2022 at "Optics express"

DOI: 10.1364/oe.449129

Abstract: Mid-infrared Er:CaF2 laser operating on the 4I11/2 → 4I13/2 transition is developed. Its power scaling capabilities and thermo-optics (fractional heat loading and thermal lensing) are compared under pumping into the 4I11/2 and 4I9/2 states. Using… read more here.

Keywords: mid infrared; power scaling; heat loading; heat ... See more keywords

Power scaling limits of diffraction-limited fiber amplifiers considering transverse mode instability.

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recommendations! Published in 2023 at "Optics express"

DOI: 10.1364/oe.483808

Abstract: An empirical TMI threshold formula is derived based on a recently developed model and used to analyze the power-scaling performance of ytterbium-doped silica glass and YAG (Y3Al5O12) and lutetia (Lu2O3) single-crystalline fiber amplifiers. Overall, the… read more here.

Keywords: diffraction limited; limits diffraction; power scaling; power ... See more keywords

Requirements on double-cladding Yb-doped fiber for power scaling of diffraction-limited fiber amplifiers.

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recommendations! Published in 2024 at "Optics express"

DOI: 10.1364/oe.516692

Abstract: Requirements on the double-cladding Yb-doped fiber (DCYF) for power scaling of diffraction-limited fiber amplifiers are studied in this paper. By considering the limitations of thermal lens and transverse mode instability separately, it is found that… read more here.

Keywords: power scaling; requirements double; cladding doped; double cladding ... See more keywords

Diode-pumped triple-clad fiber MOPA with an output power scaling up to 4.67  kW.

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recommendations! Published in 2020 at "Optics letters"

DOI: 10.1364/ol.387230

Abstract: In this Letter, we have demonstrated a triple-cladded fiber (TCF)-based master oscillator power amplifier (MOPA), with an output power scaling up to 4.67 kW, an optical-to-optical efficiency of 78%, and a beam quality factor ${{\rm… read more here.

Keywords: power; output power; power scaling; mopa output ... See more keywords

Power Scaling Methods for RF Excitation Fields in MRI Systems

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recommendations! Published in 2025 at "Journal of Electromagnetic Engineering and Science"

DOI: 10.26866/jees.2025.2.r.289

Abstract: In this paper, we analyze the homogeneity of the transmitted radiofrequency (RF) field by applying different power scaling methods ranging from low-field (12.8 MHz, 0.3 T) to high-field (298 MHz, 7.0 T) magnetic resonance imaging… read more here.

Keywords: power scaling; field; homogeneity; mri systems ... See more keywords