نتایج جستجو برای: digital communication system
تعداد نتایج: 2685634 فیلتر نتایج به سال:
The modulators are the essential demand of communication systems they are designed to scale back the channel distortion & to use in RF communication therefore several sort of carrier modulation techniques has been already projected consistent with channel properties and rate of the system. Modulation is that the method of causation knowledge signal over carrier signal to attenuate the noise or ...
the purpose of the present study was to investigate the relationship between fear of negative evaluation (fne) and communication strategies (css) among iranian efl learners. it was aimed to examine the differences in the use of communication strategies between speakers with high or low degree of fear of negative evaluation. the current study was a case study consisting of 10 english learners at...
The Compass tokamak, reinstalled at IPP Prague, will have a new digital plasma position and shape control system. Development of a communication protocol is necessary for the connection between the energetics devices 1 built by CKD company and the operator either human or computer together. The present work is focused on development of such communication protocol. Human operator can send a requ...
The visible light communication (VLC) by LED is one of the important methods because can work as high speed and VLC sends information flushing LED. We use pulse wave modulation for with be controlled easily microcontroller, which has digital output pins. At modulation, deciding low voltage middle when receiving signal level amplified equal to it threshold without amplification. In this paper, w...
This paper deals with the synchronization of spatiotemporal chaotic systems and presents a new robust secondary chaotic secure communication system for digital signal transmissions which can recover digital signal even though the transmitted signal is influenced by limited noise. The transmitter terminal and the receiver terminal both contain a spatiotemporal chaotic system and a hyperchaotic s...
conclusion by comparing the results, we saw that w/rh anode/filter combination is the best choice in breast mammography imaging because of the lowest delivered dose in comparison with w/ag and rh/al. moreover, breast thickness and g value have significant effects on mgd. objectives the aim of this study was to determine the average absorbed dose of x-ray radiation in the glandular tissue of the...
Electric utilities are expanding communications infrastructure due to increased need for information. Due to performance, price, and technological advances, digital communication systems are frequently chosen as this multiple user data network. This two-part paper describes the application of digital communication in power system protection. Part 1 describes the digital communications architect...
The quadrature modulator is a fundamental radio component for worldwide digital wireless communication standards such as Global System for Mobile Communications (GSM), Digital Communications SystemsÐ1800 MHz (DCS1800), Digital European Cordless Telecommunications (DECT), American and Personal Digital Cellular (ADC/PDC), Japanese Personal Handy Phone (PHP RCR28). A typical system application and...
Digital modulation-demodulation technique in modern digital communication system plays a very important role. Carrier synchronization is also one of the key technologies of digital wireless communication. As a kind of four phase shift keying modulation method, QPSK has strong anti-interference ability of the suppressed carrier, which is widely used in digital wireless communications. On this ba...
The essence of transmitting digital information in digital watermarking system and the dissymmetric digital watermarking framework lived on media content communication is being discussed in this paper. The protection and integrity of information during transmission is also discussed in this paper. Fast Fourier Transform (FFT) is applied for watermarking embedding algorithm to keep the balance b...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید