Design Of Uplink And Downlink In Satellite Communication

Take a look at the drawing below and note the path of devices on the left hand.

Design of uplink and downlink in satellite communication.

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. It consists of uplink transmitter satellite link and downlink receiver which can be conveniently placed in the laboratory. What are uplink and downlink. Vivacom provides uplink service for radio and tv channels via different satellite platforms from 40 w to 90 e.

The four factors related to satellite system design. 4 multiple access technique. The major frequency bands are 6 4 ghz 14 11 ghz and 30 20 ghz uplink downlink. The description provided here is imprecise as the exact configuration can vary widely.

Signal encoding in mpeg 2 sd mpeg 4 sd mpeg 4 hd h 265 hvec sd hd format depending on customer needs. 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. 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 satellite can be placed at an elevated position if needed.

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. Those are transmitting power and receiving power calculations. It receives uplink signal from the satellite antenna and transmits downlink signal to the satellite antenna. The downlink chain is built using nearly the same equipment in reverse order.

This chapter describes how the link power budget calculations are made. The cost of transmitters tend to be high compared with the cost of receiving. Satellite uplink and downlink analysis and design. Scientech 2272a satellite communication platform provides an indepth study of basic satellite communication system.

Receiving a signal through a leased line customer pop playout server or downlink from satellite. 3 atmospheric propagation effects. In general these calculations are called as link budget calculations the unit of power is decibel. 2 the choice frequency band.

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 communication going from a satellite to ground is called downlink and when it is going from ground to a satellite it is called uplink. 1 the weight of satellite. Low noise amplifier lna amplifies the weak received signal.

Carrier processor performs the frequency down conversion of received signal uplink.