Frequency-hopping spread spectrum (FHSS)

Frequency hopping, also known as frequency hopping spread spectrum (FHSS), is a wireless communication technique that involves rapidly changing the carrier frequency among multiple frequencies within a specified frequency band. This change in frequency is controlled by a pseudo-random sequence that is known to both the transmitter and the receiver. The primary purpose of frequency hopping is to reduce interference, enhance security, and enable multiple devices to share the same frequency band with minimal mutual interference. It makes it challenging for unauthorized parties to intercept or jam the signal, as the frequency-hopping pattern is not predictable. By quickly switching between different frequencies, frequency hopping minimizes the impact of interference and enhances the reliability and security of wireless communication systems.

In the context of IO-Link Wireless, frequency hopping is employed to ensure optimal performance and coexistence with existing wireless networks. It changes the frequency channels for each transmission, reducing the impact of interference and achieving a Packet Error Rate (PER) on par with wired connections, making it suitable for industrial applications where reliability is crucial.