Smart Antenna Systems and Wireless LANs by Garret Okamoto

By Garret Okamoto

This publication covers the layout and mechanics of clever antenna platforms and their compatibility with the global instant LAN regular (IEEE 802.11). incorporated are functions for instant LANs, terrestrial and satellite tv for pc mobile structures, instant information distribution platforms, and different complex platforms. In-depth insurance is equipped on using clever antenna platforms to extend community capability, lessen the consequences of channel fading, expand antenna battery existence, and improve the diversity of any instant communications structures. shrewdpermanent Antenna structures and instant LANs is a well timed publication for designers, engineers, and researchers of instant communications structures.

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11 System 47 physical layer options to provide a choice between the implementation complexity and costs necessary to achieve performance and reliability [49]. Transmit power is limited to 100 mW, with power control specifications required for any system capable of transmitting above the 100 mW level to insure that the level of the emission is reduced to a level at or below 100 mW. 11-complaint, with an optional data rate of 2 Mbps also specified. Typical ranges of the transmitters are around 500 feet in office situations and 1000 feet in open space environments.

7. Maximum Number of Nodes. Potential applications identified in market studies suggested that potential users would require the network to support a large number of nodes. The MAC should be designed such that the number of nodes does not affect performance. 8. Robustness in Collocated Networks. It is likely that multiple wireless networks will operate in the same vicinity. This introduces two severe problems, interference and security. Nodes from adjacent networks may appear as hidden nodes during periods of distributed operation.

In the final set of transmissions the PC directs Station 3 to send a broadcast transmission. Note again that the PC regains control of the network after waiting only a PIFS. 11 MAC Protocol Networks that use smart antennas are also infrastructure networks which use the PCF. A single station with a smart antenna serves as the PC. The spatial multiplexing gain only occurs during the PCF when the PC can coordinate communications amongst stations whose spatial signatures are known. Therefore, in order to capitalize on the spatial multiplexing gain, most traffic must be sent during the CFP.

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