Cluster-Based DSRC Architecture for QoS Provisioning over Vehicle
... Retransmission device recovers the digital data from analog signal Generates new, clean analog signal ...
... Retransmission device recovers the digital data from analog signal Generates new, clean analog signal ...
View
... Requires constant timing relationship Any gaps between bursts are filled in with a special sequence of 0s and 1s indicating idle Advantage: speed, no gaps or extra bits Byte synchronization accomplished by data link layer ...
... Requires constant timing relationship Any gaps between bursts are filled in with a special sequence of 0s and 1s indicating idle Advantage: speed, no gaps or extra bits Byte synchronization accomplished by data link layer ...
Fourier Transforms - Leiden Observatory
... done, rather crudely, by inserting prism/grating hardware before the correlator. In digital radio systems this can be done by inserting variable (multiple) delay lines, so that the correlation is measured at a range of delays. The correlation as a function of frequency can be recovered by an additi ...
... done, rather crudely, by inserting prism/grating hardware before the correlator. In digital radio systems this can be done by inserting variable (multiple) delay lines, so that the correlation is measured at a range of delays. The correlation as a function of frequency can be recovered by an additi ...
3G Wireless Systems
... • Adaptive modulation/coding with power control, hybrid ARQ Smaller cells, on average, than 3G • However, cell size will be made as large as possible via: High power base station to boost downlink range Asymmetry - used to boost uplink range when necessary Adaptive antennas option Higher frequ ...
... • Adaptive modulation/coding with power control, hybrid ARQ Smaller cells, on average, than 3G • However, cell size will be made as large as possible via: High power base station to boost downlink range Asymmetry - used to boost uplink range when necessary Adaptive antennas option Higher frequ ...
Signal Encoding Techniques - Ohio State Computer Science and
... • Digitizing of analog data (e.g. voice) is conversion of analog data into digital data which can then be transmitted using some digital encoding (codec) or analog modulation. • Pulse Code Modulation – PCM used for voice encoding • PCM is based on “Sampling Theorem”: – If a signal is sampled at regu ...
... • Digitizing of analog data (e.g. voice) is conversion of analog data into digital data which can then be transmitted using some digital encoding (codec) or analog modulation. • Pulse Code Modulation – PCM used for voice encoding • PCM is based on “Sampling Theorem”: – If a signal is sampled at regu ...
CSC 335 Data Communications and Networking I
... modem contains separate circuitry to send and receive digital data. To send data, a modem emits a continuous carrier wave, which it then modulates according to the values of the bits being transferred. To receive data, a modem detects modulation in the incoming carrier, and uses it to recreate the d ...
... modem contains separate circuitry to send and receive digital data. To send data, a modem emits a continuous carrier wave, which it then modulates according to the values of the bits being transferred. To receive data, a modem detects modulation in the incoming carrier, and uses it to recreate the d ...
2003 - CIS
... There are two environments available for handling this bi-directional traffic: full and half duplex. In a full duplex communications environment both devices can transmit at the same time. In a half duplex environment you can only hear or talk at any given point in time. Given the choice of full or ...
... There are two environments available for handling this bi-directional traffic: full and half duplex. In a full duplex communications environment both devices can transmit at the same time. In a half duplex environment you can only hear or talk at any given point in time. Given the choice of full or ...
Lecture 15: Wavelength-Division Multiplexing Components
... • Wavelengths for CWDM and frequencies for DWDM defined by International Telecommunication Union, a part of the United Nations located in Geneva • Central frequency is 193.1 THz, equivalent to 1552.52 nm • Frequencies for 50 GHz channel spacings are thus defined as 193.1 + 0.05n THz where n is a pos ...
... • Wavelengths for CWDM and frequencies for DWDM defined by International Telecommunication Union, a part of the United Nations located in Geneva • Central frequency is 193.1 THz, equivalent to 1552.52 nm • Frequencies for 50 GHz channel spacings are thus defined as 193.1 + 0.05n THz where n is a pos ...
Lecture 15: Passive WDM Components
... • Wavelengths for CWDM and frequencies for DWDM defined by International Telecommunication Union, a part of the United Nations located in Geneva • Central frequency is 193.1 THz, equivalent to 1552.52 nm • Frequencies for 50 GHz channel spacings are thus defined as 193.1 + 0.05n THz where n is a pos ...
... • Wavelengths for CWDM and frequencies for DWDM defined by International Telecommunication Union, a part of the United Nations located in Geneva • Central frequency is 193.1 THz, equivalent to 1552.52 nm • Frequencies for 50 GHz channel spacings are thus defined as 193.1 + 0.05n THz where n is a pos ...
View File
... • The Text Book: – The Best Book Written on the Subject of Microelectronic Circuits – Used in Most Universities in the USA and Canada – Covers Both Analog and Digital Electronic Circuits • With This Book No Need of Lecture Notes ...
... • The Text Book: – The Best Book Written on the Subject of Microelectronic Circuits – Used in Most Universities in the USA and Canada – Covers Both Analog and Digital Electronic Circuits • With This Book No Need of Lecture Notes ...
Chapter 1
... the rising edge • The transition from 1 to 0 is called the falling edge • Signals change as time progresses, and this is what enables the flow of data ...
... the rising edge • The transition from 1 to 0 is called the falling edge • Signals change as time progresses, and this is what enables the flow of data ...
A 0.18um CMOS Dual-Band UWB Transceiver
... high band of 6 to 10GHz for two reasons. Firstly, to avoid the strong interference from other communication systems operating in the low band (e.g., WiMAX), some countries already considered to extend UWB to the high band and leave the low band as an option. Secondly, this could further improve tran ...
... high band of 6 to 10GHz for two reasons. Firstly, to avoid the strong interference from other communication systems operating in the low band (e.g., WiMAX), some countries already considered to extend UWB to the high band and leave the low band as an option. Secondly, this could further improve tran ...
Wireless Communications and Networks
... Used for satellite communications 30 MHz to 1 GHz Suitable for omnidirectional applications ...
... Used for satellite communications 30 MHz to 1 GHz Suitable for omnidirectional applications ...
Operating Systems - Jazi Eko Istiyanto
... – tricky problems can arise with the synchronisation of input streams – e.g. two streams of data both nominally at 1 bit every T secs – what happens if one stream is slow ? – eventually the slow stream will miss a slot – bit-slip : ...
... – tricky problems can arise with the synchronisation of input streams – e.g. two streams of data both nominally at 1 bit every T secs – what happens if one stream is slow ? – eventually the slow stream will miss a slot – bit-slip : ...
Signals and Systems Fall 2003 Lecture #1 Prof. Alan S. Willsky 4
... Most of the signals in the physical world are CT signals—E.g. voltage & current, pressure, temperature, velocity, etc. ...
... Most of the signals in the physical world are CT signals—E.g. voltage & current, pressure, temperature, velocity, etc. ...
Chapter One
... Loss of signal strength as transmission travels away from source Analog signals pass through an amplifier, which increases not only voltage of a signal, but also noise accumulated ...
... Loss of signal strength as transmission travels away from source Analog signals pass through an amplifier, which increases not only voltage of a signal, but also noise accumulated ...
Week-4 - PCT Research Group
... A channel is portion of a transmission path dedicated to a pair of transmitter/receivers usually characterized by its bandwidth. It is a physical transmission medium such as a wire, or a logical connection over a multiplexed medium such as a radio channel A channel or transmission medium may ...
... A channel is portion of a transmission path dedicated to a pair of transmitter/receivers usually characterized by its bandwidth. It is a physical transmission medium such as a wire, or a logical connection over a multiplexed medium such as a radio channel A channel or transmission medium may ...
View File - UET Taxila
... Two binary numbers (0,1) represented by two different frequencies of the carrier wave Less susceptible to error than ASK Used up to 1200bps on voice grade lines Commonly used for high frequency ( 4 to 30mhz) radio ...
... Two binary numbers (0,1) represented by two different frequencies of the carrier wave Less susceptible to error than ASK Used up to 1200bps on voice grade lines Commonly used for high frequency ( 4 to 30mhz) radio ...
Chapter 15 & 16 Slides
... • Voice-generated sound wave can be represented by an electromagnetic signal with the same frequency components, and transmitted on a voice-grade telephone line. • Modulation can produce a new analog signal that conveys the same information but occupies a different frequency band – A higher frequenc ...
... • Voice-generated sound wave can be represented by an electromagnetic signal with the same frequency components, and transmitted on a voice-grade telephone line. • Modulation can produce a new analog signal that conveys the same information but occupies a different frequency band – A higher frequenc ...
Unit-2
... must be enough to be detected. must be sufficiently higher than noise to be received without error. ...
... must be enough to be detected. must be sufficiently higher than noise to be received without error. ...
Presentation
... • Analog signals can produce an infinite amount of signal resolution. However, in case of digital signals this is not possible. • Processing of analog signals is simpler & more straight forward. Eg: Reading an analog signal is easy as measuring a voltage. • Processing of digital signals it is more c ...
... • Analog signals can produce an infinite amount of signal resolution. However, in case of digital signals this is not possible. • Processing of analog signals is simpler & more straight forward. Eg: Reading an analog signal is easy as measuring a voltage. • Processing of digital signals it is more c ...
ATSC tuner
An ATSC (Advanced Television Systems Committee) tuner, often called an ATSC receiver or HDTV tuner is a type of television tuner that allows reception of digital television (DTV) television channels transmitted by television stations in North America, parts of Central America and South Korea that use ATSC standards. Such tuners may be integrated into a television set, VCR, digital video recorder (DVR), or set-top box that provides audio/video output connectors of various types.Another type of television tuner is a digital television adapter (DTA) with an analog passthrough.