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Frequency-hopping spread spectrum

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Definition Edit

Frequency-hopping spread spectrum (FHSS) techniques spread a signal out over many frequencies by hopping from frequency to frequency in a sequence synchronized with the receiver.

Overview Edit

Only the receiver knows the hopping pattern and how long the transmitter will stay on each frequency (as little as 100 milliseconds). This allows it to track the data across frequencies and reassemble the original signal. One frequency is not dedicated to one user, and all frequencies can be used more efficiently. As more user/signals are added, however, the noise may eventually become too great for good communications.

Bluetooth uses FHSS technology.

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