Scientech 2272a satellite communication platform provides an indepth study of basic satellite communication system.
Design of uplink and downlink in satellite communication.
2 the choice frequency band.
The downlink chain is built using nearly the same equipment in reverse order.
The description provided here is imprecise as the exact configuration can vary widely.
Those are transmitting power and receiving power calculations.
The cost of transmitters tend to be high compared with the cost of receiving.
3 atmospheric propagation effects.
It consists of uplink transmitter satellite link and downlink receiver which can be conveniently placed in the laboratory.
Uplink downlink intersatellite links relay satellite relay satellite relay satellite sensor satellite sensor satellite crossover or intersatellite links mission data launch phase tt c tt c satellite ground station tt c tracking telemetry and control the communications architecture consists of satellites and ground stations interconnected with.
The satellite can be placed at an elevated position if needed.
Low noise amplifier lna amplifies the weak received signal.
What are uplink and downlink.
This chapter describes how the link power budget calculations are made.
Take a look at the drawing below and note the path of devices on the left hand.
This block determines the type of transponder.
In general these calculations are called as link budget calculations the unit of power is decibel.
Receiving a signal through a leased line customer pop playout server or downlink from satellite.
First let us discuss the basic terminology used in link budget and then we will move onto explain link budget calculations.
The term uplink chain is used to refer to the series of pieces of equipment that are used to produce a radio frequency signal for sending out data.
When an uplink is being received by the spacecraft at the same time a downlink is being received by earth the communication is called two way.
The major frequency bands are 6 4 ghz 14 11 ghz and 30 20 ghz uplink downlink.
These calculations basically relate two quantities the transmit power and the receive power and show in detail how the difference between these two powers is accounted for.
The communication going from a satellite to ground is called downlink and when it is going from ground to a satellite it is called uplink.
Carrier processor performs the frequency down conversion of received signal uplink.
The uplink design is easier than the downlink since an accurately specified carrier power must be presented at the satellite transponder and it is often feasible to use much higher power transmitters at earth stations than can be used on a satellite.
1 the weight of satellite.
It receives uplink signal from the satellite antenna and transmits downlink signal to the satellite antenna.
Satellite uplink and downlink analysis and design.
4 multiple access technique.
In satellite communication systems there are two types of power calculations.
