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Articles tagged with #wireless-network
Introduction Forward Error Correction (FEC) is to transmit enough redundant data To attach a parity bit : a simple redundancy Block Codes Linear Block Codes inforamtion -> divided into blocks; length = k parity bits are added to each block; length...
Speed, Wavelength, Frequency c = λ * f The lightspeed is constant. (3 * 10^8 m/s) Types of Waves Space wave (upper Ionosphere) Sky wave Ground wave Ground wave follows the contour of the earth can propagate over the visual horizon <= 2MHz AM...
Two challenges Wireless wireless link Mobility change of the point attachment to the network Technology Cellular Wireless LAN/PAN (local/personal area network) GPS Satellite Based GPS Home networking home router Ad hoc networks mobile networ...
Martin Cooper Invented first mobile phone 1G: from 0 to 1 Design philosophy idea 1: Cellularization base station communication coverage limited channels cellularization: using smaller stations idea 2: Frequency reuse interference occurs when using...