7a.pdf - EEE1001 – Basic Electrical and Electronics...

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EEE1001Basic Electrical andElectronics EngineeringModule 7CommunicationEngineering
Module 7CommunicationEngineeringModulation and DemodulationAmplitude and Frequency Modulation
ModulationModulationProcessofencodinginformationinatransmitted signalProcess of converting data into electricalsignals optimized for transmission.In postal services, our letter into an envelop. The purposeof envelop is to protect the letter during transit. Samething happens during modulation. The carrier signalcarries the information/data signal.
ModulationTo improve transmission distanceIf you want to throw a piece paper to a distance of say100 meters, you can increase the distance by increasingthe weight of the paper or by inserting the paper in aheavier material.Bymodulatinganddemodulatingthecommunication/data signal, it can betransmittransmitted to a greater distance.
ModulationModulatedsignalsreducethesizeoftransmission and reception antennas.Low frequency signals require bigger antennasto transmit it to its destination.Modulation allows us to make the most out ofavailable transmission channelManysignalscanbetransmittedsimultaneously over the same channel

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Term
Fall
Professor
Sudhakar Babu
Tags
Demodulation

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