Enhanced Bandwidth Efficient Modem. (EBEM) Cryptographic Module. Non- Proprietary Security Policy. Document Number , Rev. ViaSat will provide the Army with MD(U) strategic EBEM and This modem uses advanced modulation and coding technology to. ViaSat Inc. (Nasdaq:VSAT) demonstrated its DISA certified MD Enhanced Bandwidth Efficient Modem (EBEM) to members of the U.S.

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This is achieved by the following two circuits:. Eebm this new standard is often thought of as catching the military up to commercial standards and technology, the new B standard is actually enhanced beyond pure commercial technology. Providing an open standard for this enhanced forward error correction technique means that efficiency and interoperability can finally coexist. Data to be transmitted are transferred to a modem from Data terminal equipment e.

This page was last edited on 24 Octoberat This article does not cite any sources. Views Read Edit View history. A demodulator is one of the most important parts of the receiver. The primary additions to the new standard include government approved TRANSEC, advanced modulation and forward error correction techniques, and enhancements specific to IP network-centric operation.

During a demonstration, the EBEM has shown its seamless, error-free adaptation to data rates from 28 to over Mbps without operator intervention. Satellite communication standards also define error correction codes and framing formats.

After a digital-to-analog conversion in the transmitter the signal passes through a reconstruction filter.

Satellite modem – Wikipedia

Generally, a demultiplexer is a device which transforms one multiplexed data stream to several streams which it consists of. From Wikipedia, the free encyclopedia. This module provides a basis for Ethernet interface interoperability amongst satellite modem vendors. If the analog signal was digitized without a four-quadrant multiplier, the complex envelope has to be calculated by a digital complex mixer.


There are also eebm components in the demodulator such as the Intersymbol interference equalizer. By using this site, you agree to the Terms of Use and Privacy Policy. Department of Defense telecommunication transmission policy is to simplify its integrated wireless networks.

There are also industrial satellite modems intended to provide a permanent link. These features allow users to make use of the many dBs of FDMA link margin that typically go unutilized in a fixed-channel rate environment.

A descrambler restores the original stream from the scrambled one.

EBEM – Enhanced Bandwidth Efficient Modem | AcronymFinder

They are used, for example, in the Steel shankar network. Then its frequency is converted if needed. Link budget analysis can determine feasibility, link configuration, and the possible overall savings of power and bandwidth with PCMA.

A satellite modem is not the only device needed to establish a communication channel. Moreover, it is possible to develop a demodulator which can process signals with beem modulation types. Digital demodulation implies that a symbol clock and, in most cases, an intermediate frequency generator at the receiving side have to be synchronous with those at the transmitting side.

Scrambling shouldn’t be confused with encryption, since it doesn’t protect information from intruders. These new capabilities enable you to manage ebrm communications resources and choose whether you maximize data throughput, enable more users to access the network, or decrease networking costs.

The ESEM module, used in conjunction with Information Throughput Adaptation, ramps up the satellite link data rate, and then a fbem called Radio Aware Routing advertises that throughput potential to a network router.

While most satellite transmissions require separate frequencies to transmit and receive, ViaSat PCMA technology enables one simplex carrier to be superimposed on another carrier, potentially decreasing the bandwidth required by as much as 50 percent.


A scrambler randomizes the data stream to be transmitted. A modulated signal is a sequence of symbolspieces of data represented by a corresponding signal state, e.


Retrieved from ” https: The presence of an Ethernet interface to deliver IP data over a wireless network also does not necessarily mean that heterogeneous modems are compatible. They are appropriate only when certain conditions apply: Error correction works by adding an artificial redundancy to a data stream at the transmitting side, and using this redundancy to correct errors caused by noise and interference.

The technology further enhances the benefits of any advanced modulation techniques or turbo coding you may already use. To reach that objective, DoD policy includes a reduction in the number of available wireless eebem and corresponding network hardware. A principal objective of recent U.

Satellite modem

Interoperability and an open-standard approach has great advantages, but those responsible for military SATCOM still need to be sure they choose the hardware that delivers the biggest and most efficient data pipe to the warfighter in the field. Articles lacking sources from October All articles lacking sources.

When differential coding is used, the data are deliberately made mdoem depend not only on the current symbolbut also on the previous one.