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Monday, December 23, 2013

It220 Homewor4

1. User mobility and or sotimes more cost efficiant 2. Physical companionable class (PHY), Medium Access Control (MAC), MAC focal point protocols and operate 3. A network in which the devices directly overstep with individually other 4. To relay the wireless signal and enlarge connectivity of a wider area 5. Direct Sequence expand Spectrum (DSSS), absolute oftenness Hopping Spread Spectrum (FHSS), Infrared, Orthogonal Frequency Division Multiplexing (OFDM) 6. implements 14 transmit (each consume 22 megacycle) over approximately 90 MHz of RF spectrum in the 2.4 GHz ISM (industrial, scientific, and medical) band.          North American DSSS conduct Channel Number                  Frequency (GHz)          1                                    2.412          2                                    2.417          3                                    2.422          4                                    2.427          5                                    2.432          6                                    2.437          7                                    2.442          8                                    2.447          9                                    2.452         10                                    2.
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457         11                                    2.462 7. Pseudorandom means t he sequence appears to be random but in fact! does repeat, typically aft(prenominal) some lengthy period of time. 8. Hopping Sequence - The rewrite of frequency changes. 9. 5 GHz, Orthogonal Frequency Division Multiplexing (OFDM) 10. a. 11 Mbps b. 54 Mbps c. 54 Mbps d. 200+ Mbps 11. Multiple Input Multiple output signal (MIMO), MIMO uses a technique called space-division ninefoldxing, where the information stream is split into multiple part called spatial streams. The different spatial streams are inherited victimisation separate antennas. With MIMO, doubling the spatial streams doubles the rough-and-ready data rate. 12.  802.11n only uses multiple data paths when faster data transmittal is requiredthus...If you want to get a estimable essay, order it on our website: OrderCustomPaper.com

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