600-GHz-Band Heterodyne Receiver System Using Photonic Techniques

2020 ◽  
Author(s):  
Yuta Uemura ◽  
Yuma Kawamoto ◽  
Norihiko Shibata ◽  
Li Yi ◽  
Tadao Nagatsuma
Keyword(s):  
Heterodyne Receiver ◽  
Receiver System

An IR optical heterodyne receiver system

1966 ◽  
Vol 2 (4) ◽  
pp. 138-138
Author(s):  
F. Goodwin ◽  
M. Pedinoff
Keyword(s):  
Optical Heterodyne ◽  
Heterodyne Receiver ◽  
Receiver System

Design and Evaluation of the Fresnel-Lens Based Solar Concentrator System Through a Statistical-Algorithmic Approach

2018 ◽  
Author(s):  
Hassan Qandil ◽  
Weihuan Zhao
Keyword(s):  
High Temperature ◽  
High Efficiency ◽  
Incident Light ◽  
Thermal Analyses ◽  
Solar Spectrum ◽  
Chromatic Aberration ◽  
Fresnel Lens ◽  
Optimum Number ◽  
Solar Concentrator ◽  
Receiver System

A novel non-imaging Fresnel-lens-based solar concentrator-receiver system has been investigated to achieve high-efficiency photon and heat outputs with minimized effect of chromatic aberrations. Two types of non-imaging Fresnel lenses, a spot-flat lens and a dome-shaped lens, are designed through a statistical algorithm incorporated in MATLAB. The algorithm optimizes the lens design via a statistical ray-tracing methodology of the incident light, considering the chromatic aberration of solar spectrum, the lens-receiver spacing and aperture sizes, and the optimum number of prism grooves. An equal-groove-width of the Poly-methyl-methacrylate (PMMA) prisms is adopted in the model. The main target is to maximize ray intensity on the receiver’s aperture, and therefore, achieve the highest possible heat flux and output concentration temperature. The algorithm outputs prism and system geometries of the Fresnel-lens concentrator. The lenses coupled with solar receivers are simulated by COMSOL Multiphysics. It combines both optical and thermal analyses for the lens and receiver to study the optimum lens structure for high solar flux output. The optimized solar concentrator-receiver system can be applied to various devices which require high temperature inputs, such as concentrated photovoltaics (CPV), high-temperature stirling engine, etc.

scholarly journals Design of an SVM Classifier Assisted Intelligent Receiver for Reliable Optical Camera Communication

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4283
Author(s):  
Md.-Habibur Rahman ◽  
Md. Shahjalal ◽  
Moh. Khalid Hasan ◽  
Md.-Osman Ali ◽  
Yeong-Min Jang
Keyword(s):  
Light Emitting Diode ◽  
Characteristic Curve ◽  
Analysis Data ◽  
Image Sensor ◽  
Data Rate ◽  
Support Vector ◽  
Svm Classifier ◽  
High Data ◽  
Receiver System ◽  
Optical Camera Communication

Embedding optical camera communication (OCC) commercially as a favorable complement of radio-frequency technology has led to the desire for an intelligent receiver system that is eligible to communicate with an accurate light-emitting diode (LED) transmitter. To shed light on this issue, a novel scheme for detecting and recognizing data transmitting LEDs has been elucidated in this paper. Since the optically modulated signal is captured wirelessly by a camera that plays the role of the receiver for the OCC technology, the process to detect LED region and retrieval of exact information from the image sensor is required to be intelligent enough to achieve a low bit error rate (BER) and high data rate to ensure reliable optical communication within limited computational abilities of the most used commercial cameras such as those in smartphones, vehicles, and mobile robots. In the proposed scheme, we have designed an intelligent camera receiver system that is capable of separating accurate data transmitting LED regions removing other unwanted LED regions employing a support vector machine (SVM) classifier along with a convolutional neural network (CNN) in the camera receiver. CNN is used to detect every LED region from the image frame and then essential features are extracted to feed into an SVM classifier for further accurate classification. The receiver operating characteristic curve and other key performance parameters of the classifier have been analyzed broadly to evaluate the performance, justify the assistance of the SVM classifier in recognizing the accurate LED region, and decode data with low BER. To investigate communication performances, BER analysis, data rate, and inter-symbol interference have been elaborately demonstrated for the proposed intelligent receiver. In addition, BER against distance and BER against data rate have also been exhibited to validate the effectiveness of our proposed scheme comparing with only CNN and only SVM classifier based receivers individually. Experimental results have ensured the robustness and applicability of the proposed scheme both in the static and mobile scenarios.

Use of an oscillating laser as a heterodyne receiver preamplifier

1967 ◽  
Vol 3 (6) ◽  
pp. 241-241 ◽  
Author(s):  
W. Doyle ◽  
W. Gerber ◽  
M. White
Keyword(s):  
Heterodyne Receiver

scholarly journals A Design Study of an Off-axis Paraboloid Shaping Method for Central Receiver System Heliostats

2015 ◽  
Vol 69 ◽  
pp. 158-167 ◽  
Author(s):  
L. Meng ◽  
Z. You ◽  
S. Dubowsky ◽  
B. Li ◽  
F. Xing
Keyword(s):  
Design Study ◽  
Central Receiver ◽  
Receiver System

A Low-Power Process-Scalable Super-Heterodyne Receiver With Integrated High-$Q$ Filters

2011 ◽  
Vol 46 (12) ◽  
pp. 2920-2932 ◽  
Author(s):  
Ahmad Mirzaei ◽  
Hooman Darabi ◽  
David Murphy
Keyword(s):  
Low Power ◽  
Heterodyne Receiver ◽  
High Q
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