There are three major satellite networks based on MEMS. They are
1. RF-based Satellite Constellation: Probes directly and send discrete data packets to (Low earth orbit) LEO satellite(s) for collection.
2. Mobile Ad hoc Network: Data packets hop through mobile network to be distributed at exfiltration nodes.
3. Hybrid: Combination of the two depending upon probe location and conditions.
Spreading the energy of the communications signal over a wider range of frequencies can be accomplished in a number of different ways. Two of the methods are frequency hopping spread spectrum (FHSS) and direct sequence spread spectrum (DSSS). Both methods use a related but different approach to spread the signal. Ultra-wideband techniques spread the signal over very large frequency ranges. In each case, the key is to make certain that the transmitter and receiver can lock in quickly and synchronize the spreading and dispreading actions.
1. RF-based Satellite Constellation: Probes directly and send discrete data packets to (Low earth orbit) LEO satellite(s) for collection.
2. Mobile Ad hoc Network: Data packets hop through mobile network to be distributed at exfiltration nodes.
3. Hybrid: Combination of the two depending upon probe location and conditions.
Spreading the energy of the communications signal over a wider range of frequencies can be accomplished in a number of different ways. Two of the methods are frequency hopping spread spectrum (FHSS) and direct sequence spread spectrum (DSSS). Both methods use a related but different approach to spread the signal. Ultra-wideband techniques spread the signal over very large frequency ranges. In each case, the key is to make certain that the transmitter and receiver can lock in quickly and synchronize the spreading and dispreading actions.
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