Switching frequencies to avoid interference.

Transmission technique using wide bandwidth.

a method of transmitting radio signals by rapidly changing the carrier frequency among many frequencies occupying a large spectral band.

A form of electromagnetic communication in which the signal frequency or bandwidth is spread beyond that required, rendering it more difficult to intercept or jam, or to send multiple signals over the same band

In telecommunications, direct-sequence spread spectrum is a spread-spectrum modulation technique primarily used to reduce overall signal interference.

In digital communications, chirp spread spectrum is a spread spectrum technique that uses wideband linear frequency modulated chirp pulses to encode information.