What is the term used to describe a spread spectrum communications system where the centre frequency of a conventional carrier is changed many times per second in accordance with a pseudorandom list of channels?

Frequency hopping is a specific type of spread spectrum communication. In this system, the transmitter rapidly switches, or 'hops,' its centre frequency across a wide range of channels. This is done in a pseudorandom sequence that is synchronized between the transmitter and the receiver. This rapid hopping makes the signal highly resistant to narrowband interference and difficult to intercept. The distractor 'Direct sequence' is another form of spread spectrum, but it works by combining the data with a high-speed noise-like code, rather than by changing the center frequency from channel to channel.