Satellites have been used for data communications for many years.
Satellite data transmission rate.
Designing optimal satellite data communication channels for today s data networks.
For many years qpsk or 4 qam has been the digital modulation of choice for satellite transmission.
Recently 8 state phase shift keying 8 psk has begun to.
Subframes 2 and 3 together contain the transmitting satellite s ephemeris data.
For data services in geostationary communication satellites using dvb s transmission a good rule of thumb is qpsk modulation 4 bits symbol 1 4 coding rate which means that 1 25 mhz frequency.
The data rate to the mars reconnaissance orbiter is selected automatically and continuously during communications and can be as high as 2 million bits per second.
Each pulse is a symbol.
Are you using a leo or meo or geo satellite the transmission protocol used and the links speed itself.
As allways it depends on 3 major components being the distance of the satellite i e.
Each week begins with the transmission of almanac page 1.
The carrier on the satellite is made up of a sequence of joined together pulses to make a continuous signal.
As for the distance there is a fixed delay i e.
In phase shift keying psk modulation each pulse is a burst of carrier signal with its sinewave zero.
The data rate to the.
A frame begins at the start of the gps week and every 30 seconds thereafter.
Symbol rate data rate m x fec sr 2048 3 x 0 75 910 2 ksps many modern satellite modems will calculate the symbol rate for you in the configuration pages.
This isn t a simple question to answer.
According to the modulation method each symbol represents 1 2 or 3 etc bits of transmission rate data.
Which satellite you use and whether it s new old full.
The almanac is 15 000 bits long and takes 12 5 minutes to transmit.
This places the minimum data transfer rate at about 100 kbps which is typical of current high speed access hsa services from digital subscriber line dsl in its many forms cable modems and comparable fixed wireless and satellite hsa services.
Vsat prices per mb can vary a great deal depending on things like.
However both changes in speeds and protocols in use now make it much harder to provide effective data communications on satellite channels.
