A hopping sequence, often referred to as a “frequency hopping sequence,” is a specific pattern of changing frequencies used in frequency hopping spread spectrum (FHSS) communication systems. In FHSS, the transmitter and receiver switch between different carrier frequencies according to a predefined sequence. This sequence can be random or pseudorandom and is designed to provide several benefits, including improved resistance to interference, increased security, and the ability to share the spectrum with other users.
The hopping sequence determines the order and timing of frequency changes, allowing the communication system to avoid interference from other signals on specific frequencies. It helps ensure reliable communication in the presence of noise, signal fading, and other forms of interference. By using a hopping sequence, FHSS systems can maintain connectivity even in challenging environments, making them useful for wireless communication applications such as military radios, wireless LANs, and Bluetooth devices.