FHSS Frequency Hopping Spread Spectrum

Switch carrier frequency according to pseudo-random sequence

Real-World Applications

Bluetooth, anti-interference military frequency-hopping radios, drone video transmission. Signals hop around the frequency band like grasshoppers, jamming sources cannot aim in time.

Experiment Steps

Bluetooth: 79 channels, 1600 hops/s

Simulation Experiment

Time Domain (X: Time, Y: Amplitude)

Spectrum Analysis (X: Frequency, Y: Amplitude)

FHSS Hopping Pattern Demo (Spectrogram)

FHSS Hopping Pattern & Anti-Jamming

Signal hops rapidly among 79 channels (Rate: 1600 hops/s).

Hops Sent: 0

Jammed Hops: 0

PER: 0%

Jammer Mode:

(Use parameter panel above to switch jammer type)

FHSS Principle:

1. Frequency Diversity: Although some channels may be severely jammed (red zones), communication recovers once signal hops to a clean channel.

2. Averaging Interference: Even with wideband sweep jamming, hopping signals only lose small amounts of data during occasional "collisions", easily recovered via FEC.

Parameters(Real-time)

Hop Channels79

Hop Rate1600 hops/s

Data Rate500 bps

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