Results 1 to 10 of about 25,721 (96)

On the Effect of Imperfect Reference Signal Phase Recovery on Performance of PSK System Influenced by TWDP Fading

open access: yesEntropy, 2023
We examine the effects of imperfect phase estimation of a reference signal on the bit error rate and mutual information over a communication channel influenced by fading and thermal noise.
Goran T. Djordjevic   +4 more
doaj   +3 more sources

Security bound of continuous-variable measurement-device-independent quantum key distribution with imperfect phase reference calibration [PDF]

open access: yesPhysical Review A, 2019
Phase reference calibration is a necessary procedure in practical continuous-variable measurement-device-independent quantum key distribution (CV-MDI-QKD) for the need of Bell-State Measurement (BSM). However, the phase reference calibration may become imperfect in practical applications.
Peng Huang, Wan-Su Bao, Gui-Hua Zeng
exaly   +3 more sources

Preoperative MRI features and clinical factors for predicting early recurrence of hepatocellular carcinoma after hepatectomy [PDF]

open access: yesFrontiers in Oncology
IntroductionEarly recurrence after hepatectomy remains a major obstacle to durable disease control in hepatocellular carcinoma (HCC). This study developed and externally validated a prediction model based on preoperative MRI features and clinical ...
Quanyou Miao   +7 more
doaj   +2 more sources

Comparison of six nutritional screening tools for identifying BMI‑defined malnutrition in patients with Crohn’s disease: a cross‑sectional study [PDF]

open access: yesBMC Gastroenterology
Background There is currently debate in clinical practice regarding the selection of nutritional screening tools for patients with Crohn’s disease. This cross-sectional study aimed to compare the ability of six nutritional screening tools to identify ...
Zhihui Yu   +8 more
doaj   +2 more sources

Performance of qpsk system in the presence of pulse interference and noisy carrier reference signal [PDF]

open access: yesSerbian Journal of Electrical Engineering, 2003
The aim of this paper is the determining the system performance in detecting the QPSK signal. The error probability is determined when the signal, Gaussian noise, pulse interference and imperfect carrier phase recovery are taken into consideration. Phase
Stefanović Mihajlo   +2 more
doaj   +1 more source

Machine Learning-Assisted Measurement Device-Independent Quantum Key Distribution on Reference Frame Calibration

open access: yesEntropy, 2021
In most of the realistic measurement device-independent quantum key distribution (MDI-QKD) systems, efficient, real-time feedback controls are required to maintain system stability when facing disturbance from either external environment or imperfect ...
Sihao Zhang   +5 more
doaj   +1 more source

Compensation for In-Phase/Quadrature Phase Mismatch in Coherent Free-Space Optical QPSK Communication Systems

open access: yesApplied Sciences, 2021
The Gram–Schmidt orthogonalization procedure (GSOP) and Löwdin symmetric orthogonalization procedure (SYOP) are the two mainstream algorithms for the compensation of phase mismatch in an imperfect optical 90° hybrid.
Xueliang Li   +4 more
doaj   +1 more source

A Straightness Error Compensation System for Topography Measurement Based on Thin Film Interferometry

open access: yesPhotonics, 2021
Straightness error compensation is a critical process for high-accuracy topography measurement. In this paper, a straightness measurement system was presented based on the principle of fringe interferometry. This system consisted of a moving optical flat
Hang Su   +4 more
doaj   +1 more source

Grid integrated solar energy transfer system with a two‐layer complex coefficient filter‐based control

open access: yesIET Power Electronics, 2022
In this paper, a novel control strategy for grid‐integrated solar energy transfer system (SETS) is proposed which enhances the grid power quality along with active power injection.
Renuka Varma P C   +3 more
doaj   +1 more source

Performance of a two-link CPSK system incorporating direct phase regenerator with imperfect phase references

open access: yesElectronics Letters, 1984
The letter analyses the performance of a two-link binary coherent phase-shift-keying (CPSK) communication system incorporating a direct phase regenerator (DPR) with imperfect carrier reference signals in the regenerator and the receiver. These references are extracted from the received signals by means of squaring loops.
S. Salameh, A.G. Chapman
openaire   +1 more source

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