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Power Management in Mobile Devices
book

Power Management in Mobile Devices

by Findlay Shearer
April 2011
Intermediate to advanced content levelIntermediate to advanced
336 pages
13h 59m
English
Newnes
Content preview from Power Management in Mobile Devices
33
www.newnespress.com
Introduction to Power Management in Portable Personal Devices
technique, as opposed to DSSS
s “ spread ” and FHSS ’ s “ hopping ” techniques, by slowing
the symbol rate enough so that it is longer than the delay spread. The data is mapped across
several lower-speed signals effectively blocking interference because transmission is spread
across all sub-carriers in parallel. Table 1.3 shows a comparison of the three techniques.
Table 1.3 : DSSS, FHSS, and CODFM Comparison
DSSS FHSS COFDM
Band 2.4 GHz 2.4 GHz 5 GHz
Standard IEEE 802.11b IEEE 802.11b, Bluetooth IEEE 802.11a
Carrier ...
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Publisher Resources

ISBN: 9780750679589