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Flashcards

Lesson 3 - CPEN 80

Clarisse Kyla San Juan Inglês 60 flashcards

Flashcards do conjunto (60)

  1. 1provides more information capacity, high data security, quicker system availability with great quality communicationDigital Modulation
  2. 2is a type of Amplitude Modulation which represents the binary data in the form of variations in the amplitude of a signal.Amplitude Shift Keying
  3. 3is the digital modulation technique in which the frequency of the carrier signal varies according to the discrete digital changes.Frequency Shift Keying
  4. 4The binary 1s and 0sMark and Space Frequencies
  5. 5is the digital modulation technique in which the phase of the carrier signal is changed by varying the sine and cosine inputs at a particular time.Phase Shift Keying
  6. 6In this technique, the sine wave carrier takes two phase reversals such as 0° and 180°.Shift Keying
  7. 7Other term for Shift Keying (BPSK)2-phase PSK (or) Phase Reversal Keying.
  8. 8This is the phase shift keying technique, in which the sine wave carrier takes four phase reversals such as 0°, 90°, 180°, and 270°.Quadrature Phase Shift Keying (QPSK)
  9. 9If this kind of techniques are further extended, PSK can be done by _____________ also, depending upon the requirement.eight or sixteen values
  10. 10QPSK is a variation of BPSK, and it is also a DSB-SC (Double Sideband Suppressed Carrier) modulation scheme, which send two bits of digital information at a time, called asbigits
  11. 11the phase of the modulated signal is shifted relative to the previous signal element. No reference signal is considered here. The signal phase follows the high or low state of the previous element.Differential Phase Shift Keying (DPSK
  12. 12the HIGH state represents an __ in the modulating signal, LOW state represents a __ in the modulating signal.M, W
  13. 13includes telephony, telegraphy, and television, means communication at a distanceTelecommunication
  14. 14_______ in Greek means fartele
  15. 15refers to information presented in whatever form is agreed upon by parties creating and using data.Data
  16. 16are the exchange of data between two devices via some form of transmission mediumData Communications
  17. 17usually involving a collection of computers and other devices operating autonomously and interconnected to provide computing or data servicesData communications network
  18. 18The communication that occurs in our day-to-day life is in the form ofsignals
  19. 19The interconnection of computers and devices can be established with eitherwired or wireless transmission media
  20. 20The digital signals consist of 1s and 0s which indicateHigh and Low values
  21. 21- can be an analog signal.Source
  22. 22a transducer which takes a physical input and converts it to an electrical signal.Input Transducer
  23. 23- represented by a binary sequenceDigital Signal
  24. 24- compresses the data into minimum number of bits. - removes the redundant bits unnecessary excess bits (zeroes)Source Encoder
  25. 25- does the coding for error correction. - adds some redundant bits to the transmitted data to prevent the signal to get altered due to the noise in the channelChannel Encoder
  26. 26the redundant bits that is added by the channel encoder.Error Correcting Bits
  27. 27modulates the signal to be transmitted.Digital Modulator
  28. 28allows the analog signal to transmit from the transmitter end to the receiver end.Channel
  29. 29- first step at the receiver end. - Converts/reconstructs the signal from analog to digitalDigital Demodulator
  30. 30- does some error corrections. - Adds some redundant bits that helps in the complete recovery of the original data.Channel Decoder
  31. 31– this is where the resultant signal is once again digitized by sampling and quantizing so that the pure digital output is obtained without the loss of information - recreates the source outputSource Decoder
  32. 32- the last block which converts the signal into the original physical form, which was at the input of the transmitter. - converts the electrical signal into physical outputOutput Transducer
  33. 33is the output which is produced after the whole processOutput Signal
  34. 34a path to carry or flow.Channel
  35. 35- means the flow of data or to carry the data from one device to another. - is a computer path or medium used to transfer the data from sender to receiverData Channel
  36. 36Flow and Congestion ControlStream Control Transmission Protocol (SCTP)
  37. 37provides securityDatagram Transport Layer Security (DTLS)
  38. 38- Connectionless communication protocolUser Datagram Protocol (UDP)/ Internet
    Protocol (IP)
  39. 39traversalNetwork Address Translational (NAT)
  40. 40- a common measurement unit of data transferBaud
  41. 41- measures the rate at which the data is transferred from the sender to the receiver in the data channel - Measures how many times per second a signal changes.Baud Rate
  42. 42– or Bytes per second Bps. - Measurement of speed at which the data is transferred.Bits per Second
  43. 43- range of frequencies over which a communication system works - measures the amount of data that can be transferred in a given amount of time over a data channel. - the difference between the highest and the lowest frequencies of a data channelBandwidth
  44. 44(cycles per second) measurement unit of frequencyHertz
  45. 45determines the rate of speed at which the data is transferred from one point to another.Data Transfer Rates
  46. 46consists of several elements that work together to generate radio waves that contain useful information such as audio, video, or digital data.Radio Transmitter
  47. 47Provides the necessary electrical power to operate the transmitter.Power Supply
  48. 48Creates alternating current at the frequency on which the transmitter will transmit.Oscillator
  49. 49Adds useful information to the carrier wave.Modulator
  50. 50- makes slight increases or decreases to the intensity of the carrier wave.Amplitude modulation (AM)
  51. 51makes slight increases or decreases the frequency of the carrier wave.Frequency Modulation (FM)
  52. 52Amplifies the modulated carrier wave to increase its power.Amplifier
  53. 53Converts the amplified signal to radio waves.Antenna
  54. 54uses an antenna to capture radio waves, processes those waves to extract only those waves that are vibrating at the desired frequency, extracts the audio signals that were added to those waves, amplifies the audio signals, and finally plays them on a speaker.Radio Receiver
  55. 55- Captures the radio wavesAntenna
  56. 56- A sensitive amplifier that amplifies the very weak radio frequency (RF) signal from the antenna so that the signal can be processed by the tuner.RF Amplifier
  57. 57A circuit that can extract signals of a particular frequency from a mix of signals of different frequencies.Tuner
  58. 58Responsible for separating the audio information from the carrier wave.Detector
  59. 59amplifies the weak signal that comes from the detector so that it can be heard.Audio Amplifier
  60. 60—

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FlashCards sobre Lesson 3 - CPEN 80, criado por Clarisse Kyla San Juan em 27-11-2022.
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