SATELLITE COMMUNICATIONS SYSTEMS

Ngày tải lên: 02/03/2013, 16:57

... orbiting satellite: (a) first pass; (b) second pass, earth having rotated 25˚. Satellite period is 102 min. TLFeBOOK 1 Overview of Satellite Systems 1.1 Introduction The use of satellites in communications ... Edition L EE ● Mobile Communications Engineering, Second Edition L EE ● Lee’s Essentials of Wireless L OUIS ● Telecommunications Internetworking P ATTAN ● Satelite-Based Cell...

Ngày tải lên: 20/01/2014, 06:20

... measurements on digital RF communications systems; • an overview table with key specifications for the major digital communications systems; and • a glossary of terms used in digital RF communications. These ... modulation used in many communications systems today. Emphasis is placed on explaining the tradeoffs that are made to optimize efficiencies in system design. Most comm...

Ngày tải lên: 26/01/2014, 04:20

Ngày tải lên: 29/03/2014, 14:20

... are made for interference-free, multiple-user communications systems. It is necessary to accurately measure parameters in digital RF communications systems to make the right tradeoffs. Measurements ... 3.2 to 3.4 form the building blocks for many systems. There are three main variations on these basic building blocks that are used in communications systems: I/Q offset modulation,...

Ngày tải lên: 31/03/2014, 07:20

... the Overview of Satellite Systems 19 LEOSAR satellites GEOSAR satellites Figure 1.8 Geostationary orbit search and rescue (GEOSAR) and low earth orbit search and rescue (LEOSAR) satellites. (Courtesy ... subsatellite point The point on the earth vertically under the satellite is referred to as the subsatellite point. The latitude and longitude of the subsatellite point and the height of...

Ngày tải lên: 01/04/2014, 00:01

... Pantelous VI Contents Part 6 High Capacity Satellite Communications 133 Chapter 6 Passive Microwave Feed Chains for High Capacity Satellite Communications Systems 135 Giuseppe Addamo, Oscar Antonio ... ADVANCES IN SATELLITE COMMUNICATIONS Edited by Masoumeh Karimi and Yuri Labrador Preface The use of satellites in communications system...

Ngày tải lên: 19/06/2014, 19:20

... Advances in Satellite Communications 4 Although an analytical approach can sometimes provide a fast approximation ... solutions. The chapter is concluded with the comparison of these antennas and their application in satellite communications. 2. Monofilar helical antennas The helical antenna was invented by Kraus in ... NL 0 where L 0 is the wire length of one turn L 0 = (C...

Ngày tải lên: 19/06/2014, 19:20

... Atmospheric Turbulence on Bit Error Rate for Satellite Communications in Ka-band 0 Theoretical Analysis of Effects of Atmospheric Turbulence on Bit Error Rate for Satellite Communications in Ka-band Tatsuyuki ... the second moment of a Gaussian wave beam, we prepare the 30 Advances in Satellite Communications Advances in Satellite Communications 22 when two pairs are fed i...

Ngày tải lên: 19/06/2014, 19:20