Digital Modulation in Data Communicaion

May 5th, 2015
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The Universal Seven-Part Circuit of Data Communications System Seven-Part Circuit of Data Communications System - A universally accepted standard designed to send data from a source to a remote destination.

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Digital Modulation in Data CommunicaionThe Universal Seven-Part Circuit of Data Communications SystemSeven-Part Circuit of Data Communications System- A universally accepted standard designed to send data from a source to a remote destination.The Universal Seven-Part Circuit of Data Communications System 1.The Data Terminal Equipment (DTE) at point A.2.The interface between the DTE and the Data Circuit-Terminating Equipment (DCE or often called Data Communications Equipment) at point A. 3.The DCE at point A.4.The transmission channel between points A and B.5.The DCE at point B.6.The DCE - DTE interface at point B.7.The DTE at point B.DIGITAL MODULATIONPhase Shift Keying-One of the simplest forms of digital modulation is binary or Bi-Phase Shift Keying (BPSK). One application where this is used is for deep space telemetry. The phase of a constant amplitude carrier signal moves between zero and 180 degrees. On an I and Q diagram, the I state has two different values. There are two possible locations in the state diagram, so a binary one or zero can be sent. The symbol rate is one bit per symbol. A more common type of phase modulation is Quadrature Phase Shift Keyin

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