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Design of a Diversity-Antenna Receiver System as Applied to the Satellite Radio Service (.pdf)
International. ABSTRACT. Why is reception a challenge? By its essence,. engineering attempts to balance cost, safety and. As Satellite Digital Audio Radio Services (SDARS). performance. In a communication system, the system. become more prevalent and more mature, automotive. design often includes
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Thin Film Resonators and High Frequency Filters
in the spectrum from 500 MHz to 6 GHz. These systems include pager, cellular phone, navigation, satellite communication, and various forms of data communication. Other electronic systems have need for frequency control devices beyond 6 GHz. The need for high performance frequency control devices has become
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Technology Advances Equal Innovative Earth Station Designs
to are considerable advances in satellite or allow the use of lower cost periph-. meet this type of requirement. communication technology that are. erals to lower the equipment acquisi-. In the last few years, signal. affecting the implementation of HPAs tion costs for an operator. compression technology has
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Smart Computing Article - E-mail Unplugged
, or satellite communication technologies to send and receive data. For example, when you use a wireless cell phone to make a call, the message transmits via low-energy radio signals (which travel through space, not along a wire) to the closest radio transmitter/receiver antenna. The antenna's area
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Wireless Infrastructure Tutorial and Primer
Wireless communication involves the transport of voice, video and data using Radio Frequency (RF) or Microwaves. Radio Frequency is defined as a rate of oscillation or frequency within a range of approximately 3kHz to 300 GHz. Typical Radio Frequency applications include... Wireless Infrastructure
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Weed Instrument Helps Keep New Orleans Dry
a random transmission, to the Army Corps of Engineers, warning them that the water level is high limit.”. The final data route is through Iridium satellite phone modems, a slower and more costly link than GOES. One advantage that the Iridium channel offers is two-way voice and data communication, which
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Optical Fiber Waveguides Augment C4ISR Networks
) and downlink (dL) signals between the satellite modem(s) and antenna(s). The characteristics of the fiber optic iFL have been designed to seamlessly replace a copperbased coaxial iFL and provide redundant capability to the high priority rF channels. The OFW-7000 circuit topography schemes does
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Basic Serial EEPROM Operation
, faxes, modems, pagers,. ments, or, the designer must face a more complicated. and satellite receivers. design-in with a serial EEPROM. Industrial. Bar code readers, point-of-sale ter-. This article addresses two issues that exist today for. minals, smart cards, lock boxes,. designers considering