Download e-book for kindle: Practical Wireless Data Modem Design (Artech House Mobile by Jonathon Y. C. Cheah

Design

By Jonathon Y. C. Cheah

ISBN-10: 1580530478

ISBN-13: 9781580530477

ISBN-10: 1580532284

ISBN-13: 9781580532280

With out depending upon rigorous mathematical derivations, and together with real layout examples, this article deals the reader the information and instruments to extra successfully examine, specify and clear up a large number of universal instant information modem layout difficulties. It information modem kinds and purposes in quite a few equipment and offers layout info of satellite tv for pc flooring station modems and the interplay among hyperlink budgets and modem functionality necessities and implementations. The publication additionally explores electronic mobile phone modem functionality matters, explains modem layout "Rules of Thumb" understood between designers and introduces the radio regulatory approval procedure from an engineer's point of view. The publication additionally overviews a number of the modulation varieties and modem functions, examines sign impairments resembling section noise, tone interference and microwave oven interference, and provides the layout information of a practical (63,47) Reed Solomon Codec utilized in CDPD

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Extra resources for Practical Wireless Data Modem Design (Artech House Mobile Communications Library)

Example text

Of course, any two-point link as described here can be a fundamental building elerrient of a complicated mu1t ipoint distributed wireless network. This chapter focuses on the basic parameters that infliience the characteristics of the propagation medium segment. These parameters include some considera- 39 Propagationsegment .................................................................................................................. -inte&rence [email protected] -multipath efkcts Transmit Rece be ..................................................................................................................

Thc aim of a lirik budget is to account for all the signal powers arid signal lossm, so that, a siifficicrit signal power can be delivered to the receiver to maintain t k rcqiiirccl C/N. 111doing so, a link budget is riot unlike a financial balance sheet with rcvrriiie ori one side and expenditures on the other, arid a person trying hard to t)alariw tlit accounts. Thus, the C/N value at the satellite can be dctcrrriiried ty a tmsic uplirik C/N equation (the revenue side of the balance sheet) which, c\xprwscd iri dB, can be written a s rid.

1 18W alt: 5387 feet System parameters: Transmitter parameters: Operating freq. 5 Listing for the terrestrial LOS link calculation. 4 analysis p=l Fade margin required= 4 dB Link margin: (dB) Margin := ( TxPower - Pathloss) + TxAnt ... orri~riorilyacwptcci as accurate enough for most link tnidget calciilatioris. Ariotlicr c*orrirrionly uscc1 rain at tcriiiatiori rriodcl is the one recorrirrierided by the Iritorriatiod Radio Corisiiltativc Corrirriittce (CCIR). atiori is a very important parameter for the Crane rain rriocicl.

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Practical Wireless Data Modem Design (Artech House Mobile Communications Library) by Jonathon Y. C. Cheah


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