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Topic ClosedBaseband Equipment - Ground Station Components

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Direct Link To This Post Topic: Baseband Equipment - Ground Station Components
    Posted: 07/August/2015 at 22:53
Baseband Equipment - Satellite Ground Station Components
 
In these tutorials we will look at the various component parts that make up a satellite ground station and the typical practices that engineers employ during satellite ground station engineering projects.
 

Baseband


Modulation and Demodulation (Modem)
The modulators convert the user data from digital signals such as internet IP traffic to IF signals for transmission through the transmit chain and up converters to the HPA and antenna feed. The demodulators do the opposite in the receive chain converting the IF signals back to user data.

Encoders and Decoders
Encoders are used to format user data into a format suitable for transmission over satellite. They provide the formatted data to the modulators and are mainly used to format digital television data by use of compression and other technologies resulting in a reduction of data.

Decoders do the opposite and by effectively reverse engineering the encoding process they reproduce the original data so that the end result is high quality without using large amounts of expensive satellite bandwidth.

Integrated Receiver Decoder (IRD)
The integrated receiver decoder is a combined demodulator and decoder which is used to recover the user data using a single unit rather than two separate units. Often these are used to monitor the downlink of a ground station so that the user data quality can be verified such as TV broadcasts.

 
In the next Tutorial we will look at System Control and Monitoring (M&C).
 


Edited by Satcoms UK - 30/August/2015 at 22:41
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