Design Of Uplink And Downlink In Satellite Communication

The satellite can be placed at an elevated position if needed.

Design of uplink and downlink in satellite communication.

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. Low noise amplifier lna amplifies the weak received signal. Those are transmitting power and receiving power calculations. 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.

It receives uplink signal from the satellite antenna and transmits downlink signal to the satellite antenna. The description provided here is imprecise as the exact configuration can vary widely. It consists of uplink transmitter satellite link and downlink receiver which can be conveniently placed in the laboratory. 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.

In general these calculations are called as link budget calculations the unit of power is decibel. What are uplink and downlink. The four factors related to satellite system design. Vivacom provides uplink service for radio and tv channels via different satellite platforms from 40 w to 90 e.

Satellite uplink and downlink analysis and design. Receiving a signal through a leased line customer pop playout server or downlink from satellite. 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 cost of transmitters tend to be high compared with the cost of receiving.

4 multiple access technique. Take a look at the drawing below and note the path of devices on the left hand. 1 the weight of satellite. In satellite communication systems there are two types of power calculations.

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 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. Signal encoding in mpeg 2 sd mpeg 4 sd mpeg 4 hd h 265 hvec sd hd format depending on customer needs.

2 the choice frequency band. The major frequency bands are 6 4 ghz 14 11 ghz and 30 20 ghz uplink downlink. First let us discuss the basic terminology used in link budget and then we will move onto explain link budget calculations. 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.