Satellite Uplink And Downlink Design

What are uplink and downlink.

Satellite uplink and downlink design. Communication satellites bring the world to you anywhere and any time. Carrier processor performs the frequency down conversion of received signal uplink. 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. 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 cost of transmitters tend to be high compared with the cost of receiving. Satellite communication module 3 satellite link design 02 11 14 2 3. The downlink chain is built using nearly the same equipment in reverse order. We enable the power of the internet.

Low noise amplifier lna amplifies the weak received signal. It receives uplink signal from the satellite antenna and transmits downlink signal to the satellite antenna. Satellite uplink and downlink analysis and design. 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.

Design of the satellite link 1. 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. 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. We design build commission and maintain satellite uplink downlink systems on a turnkey basis.

This chapter describes how the link power budget calculations are made. Universal engineering college thrissur 680123 department of ece ec09 l05. Satellite downlink in this process satellite sends the signal and the earth station receives it. The equation is same as the satellite uplink with a difference that we use the abbreviation d everywhere instead of u to denote the downlink phenomena.

Take a look at the drawing below and note the path of devices on the left hand. 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. The description provided here is imprecise as the exact configuration can vary widely.