نتایج جستجو برای: satellite communication
تعداد نتایج: 420906 فیلتر نتایج به سال:
Satellite personal communication services (S-PCS) are one of the recent systems available to global mobile user. The benefits with using satellites are greater coverage, especially in remote areas such as the poles or in the middle of the oceans. However, satellite communication is expensive and for personal use still in its infancy. Today there exist a number of operators delivering more or le...
This paper presents a novel electrical polarization tracking method for mobile satellite communication systems that use linear polarization. It consists of two main technologies; the first estimates the mobile station antenna’s relative polarization angle against that of the satellite’s onboard antenna, the second forms counter polarization against the estimated value. We use a Ku-band communic...
Approved: _______________________________ Thesis Chairman Chapter 1: Introduction Wireless communication is a convenient way to transmit voice or data from point to point, and is essential for mobile communications. Commercial applications include cellular telephony, globalpositioning satellite, direct-broadcast satellite, and wireless computing. A block diagram of a radiofrequency transceiver ...
In this paper, Electromagnetic capability (EMC) has substantial role in projects with electromagnetic properties. In this paper, EMC in transponder payload for communication satellite is evaluated. EMC problems are assessed in two levels, system and subsystem level. Charging, grounding and bonding are studied about system level. In general, subsystem tests involve radiated emission, condu...
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