Flashcards
communication system
Cards in this deck (17)
- 1Network:meant for communication via computers or cell phones (each device/ user is called a node). Goal: to have all nodes connect and communicate
- 2Wide Area Network (WANs)largest, fiber optic, i.e. internet and telephone.
- 3Metropolitan Area Networks (MANs)- relatively smaller areas, fiber optic, I.E. local cable TV, large companies, governments.
- 4Local Area Networks (LANs)small group of computers (<1000), twisted cable for short distance communication, can be wireless, I.E. small businesses and homes, Wi-Fi (Wireless Fidelity, 300 ft.)
- 5Personal Area Networks (PANs)short-range, wireless (30 ft.), I.E. Bluetooth headset (which uses frequency hopping)
- 6Home Area Networks (HANs)inside the home to control energy usage
- 7Storage Area Networks (SANs)connect large data storage devices, I.E. HDDs to computers
- 8Simplex- one-way communicationA transmitter at one end and a receiver at the other, I.E. radio broadcasting, paging, remote control
- 9Half Duplex-two-way communication, Two transmitters and two receivers, but only one party can transmit at a time, I.E. fax machines, police service, computer modems
- 10Full Duplex-two-way communication. Two transmitters and two receivers. Both parties can transmit and receive information at the same time. I.E. cell phones
- 11Radio Wave-electromagnetic wave that travels at the speed of light186,282 miles per 1 second!
- 12Radio Transmitter-can generate an electromagnetic wave by applying an alternating (AC) voltage to an antenna
- 13Electromagnetic Wave-The higher the frequency, the shorter the wavelength and thus the smaller the antenna.
- 14Amplitude Modulation (AM)-voltage changes amplitude
- 15Frequency Modulation (FM)carrier amplitude: constant, frequency: changes.
- 16Phase Modulation (PM)a modulation pattern that encodes information as variations in the instantaneous phase of a carrier wave
- 17Spread spectrum (SS)-developed during World War II to prevent the enemy from interpreting radio transmissions
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- Undergraduate (college) electrical engineering 003 Flashcards on communication system, created by Lillian Mehler on 11/06/2015.
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- Lillian Mehler
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