Technical Challenges and Performance of Satellite Communications on-the-Move Systems
نویسندگان
چکیده
113 INTRODUCTION The growing demand from the commercial and military sectors for on-the-move communications at high data rates has generated interest in a new type of satellite terminal. These terminals can provide broadband communications from maritime vessels, trains, airplanes, land vehicles, and other transportation systems. Although the interest in the commercial sector is primarily in broadband Internet services, satellite communications on-the-move (SOTM) terminals have become an essential component in military applications, primarily for tactical communications. Terminals mounted on land vehicles, also known as vehicle-mounted Earth stations (VMES), can provide two-way, high-data-rate services while on the move over geostationary satellites operating at the X, Ku, and Ka frequency bands. (The typical ranges of uplink and downlink frequencies used by satellites at the Ku-band are 14 and 12 GHz, respectively; the corresponding frequencies for the Ka-band are 30 and 20 GHz, and for the X-band are 8 and 7 GHz, respectively. A precise definition of the frequency bands Technical Challenges and Performance of Satellite Communications on-the-Move Systems
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