Analog-to-digital interface system for CCD sensors and cameras

1999 ◽  
Author(s):  
Andrew A. Krasnjuk ◽  
Dmitriy S. Sherhalov ◽  
Vladimir J. Stenin
Keyword(s):  
Digital Interface ◽  
Analog To Digital ◽  
Interface System

scholarly journals Iterative Signal Processing for Mitigation of Analog-to-Digital Converter Clipping Distortion in Multiband OFDMA Receivers

2012 ◽  
Vol 2012 ◽  
pp. 1-16 ◽  
Author(s):  
Markus Allén ◽  
Toni Levanen ◽  
Jaakko Marttila ◽  
Mikko Valkama
Keyword(s):  
Fundamental Problem ◽  
Turbo Decoding ◽  
Laboratory Measurements ◽  
Digital Interface ◽  
Analog To Digital ◽  
Front End ◽  
Digital Hardware ◽  
Receiver Performance ◽  
Almost All ◽  
Clipping Distortion

In modern wideband communication receivers, the large input-signal dynamics is a fundamental problem. Unintentional signal clipping occurs, if the receiver front-end with the analog-to-digital interface cannot respond to rapidly varying conditions. This paper discusses digital postprocessing compensation of such unintentional clipping in multiband OFDMA receivers. The proposed method iteratively mitigates the clipping distortion by exploiting the symbol decisions. The performance of the proposed method is illustrated with various computer simulations and also verified by concrete laboratory measurements with commercially available analog-to-digital hardware. It is shown that the clipping compensation algorithm implemented in a turbo decoding OFDM receiver is able to remove almost all the clipping distortion even under significant clipping in fading channel circumstances. That is to say, it is possible to nearly recover the receiver performance to the level, which would be achieved in the equivalent nonclipped situation.

scholarly journals About the Smart Weather Station

2016 ◽  
Vol 68 (1) ◽  
pp. 26-29
Author(s):  
Mihai Bogdan
Keyword(s):  
Data Sheet ◽  
Smart Sensors ◽  
Smart Sensor ◽  
Weather Station ◽  
Electronic Data ◽  
Digital Interface ◽  
New Approach ◽  
Analog To Digital ◽  
Electrical Signals ◽  
Weather Stations

Abstract Until recently, the Romanian weather stations utilized ordinary transducers that acquire useful information related to the desired physical inputs. These inputs will be converted into electrical signals easy to be processed by analog to digital converters. This paper proposed a new approach based on smart sensors system that change the interior behavior in order to optimize data acquirements from the environment. The smart sensor characteristics are stored into himself in a transducer electronic data sheet form (TEDS). The intelligent transducer generat together with the measured analogic signal also a digital interface. Through this interface the transducer’s catalog data can be read from the transducer.

scholarly journals A Low-cost Microcomputer System for Controlling Relative Humidity in Horticultural Storages

1994 ◽  
Vol 4 (1) ◽  
pp. 51-54 ◽  
Author(s):  
L.R. Adam ◽  
M.K. Pritchard
Keyword(s):  
Standard Deviation ◽  
Relative Humidity ◽  
Low Cost ◽  
General Purpose ◽  
Microcomputer System ◽  
Research Facility ◽  
Digital Interface ◽  
Horticultural Crops ◽  
Interface System ◽  
Monitoring Temperature

An inexpensive system for monitoring and controlling relative humidity (RH) above 90% and for monitoring temperature was developed and tested in a storage research facility for horticultural crops. A general-purpose IBM-PC microcomputer connected to an analog/digital interface system allowed for 16 differential analog inputs and 12 digital outputs for monitoring temperature and RH in eight storage rooms. Relative humidity, measured at 2-min intervals by an inexpensive wet/dry bulb psychrometer in each room, was regulated by a cool-mist humidification system. The standard deviation of RH from set-point was ± 2.8% at 2C and ±3.1% at 10C dry bulb temperature. The software. written in BASIC, allows for additional upgrading to meet future requirements. Commercially available components were used to construct the system at a cost of about Cd$1400 (Canadian) (microcomputer and cool-mist humidification system excluded).

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