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What is ISM band

Chapter 55
Encyclopedia of Networked and Virtual Organizations
Industrial, Scientific and Medical band. A license free frequency band for operation of industrial, scientific, and medical equipment.
Published in Chapter:
Development of a University Networking Project
Almudena Moreno Mínguez (Universidad de Valladolid, Spain) and Enrique Crespo Ballesteros (Universidad de Valladolid, Spain)
Copyright: © 2008 |Pages: 14
DOI: 10.4018/978-1-59904-885-7.ch055
Abstract
A communications channel has an important dependence for the channel capacity (C, in bps) to channel bandwidth (W, in Hz) ratio; this is capacity per unit bandwidth on signal to noise ratio (S/N, power of the signal over power of noise). Shannon’s formula gives an upper limit for this dependence (Shannon & Weaver, 1949), C/W=log2 (1+S/N), which represents channel efficiency. Phase lock loops for waves and data symbols in the presence of noise have been given (Reis, Rocha, Gameira, & Carvalho, 2005).
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Chapter 10
Advance and Innovation in Wireless Power Transmission Technology for Autonomous Systems
The industrial, scientific, and medical radio band (ISM band),are also called unlicensed bands, refers to a group of radio bands or parts of the radio spectrum that are internationally reserved for the use of radio frequency (RF) energy intended for scientific, medical and industrial requirements rather than for communications. ISM bands are generally open frequency bands, which vary according to different regions and permits.
Published in Chapter: Advance and Innovation in Wireless Power Transmission Technology for Autonomous Systems; From: Handbook of Research on Advanced Trends in Microwave and Communication Engineering
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