Satellite Uplink And Downlink Design

Universal engineering college thrissur 680123 department of ece ec09 l05.

Satellite uplink and downlink design.

Design of the satellite link 1. The uplink dish is pointed toward a particular satellite and the uplinked signals are transmitted within a specific frequency range so as to be received by one of the transponders tuned to that. Satellite downlink in this process satellite sends the signal and the earth station receives it. The cost of transmitters tend to be high compared with the cost of receiving.

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. We design build commission and maintain satellite uplink downlink systems on a turnkey basis. 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. 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.

Take a look at the drawing below and note the path of devices on the left hand. Communication satellites bring the world to you anywhere and any time. This block determines the type of transponder. This chapter describes how the link power budget calculations are made.

Satellite communication module 3 satellite link design 02 11 14 2 3. Carrier processor performs the frequency down conversion of received signal uplink. 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.

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. 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. Satellite uplink and downlink analysis and design. Low noise amplifier lna amplifies the weak received signal.

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 enable the power of the internet. The downlink chain is built using nearly the same equipment in reverse order.