Skipfrekvens

Skipfrekvens refers to the phenomenon where a radio transmitter intentionally skips a specific frequency or band of frequencies during its transmission. This technique is often employed in spread spectrum communication systems, such as frequency hopping spread spectrum (FHSS).

The primary purpose of skipfrekvens is to enhance the security and resilience of wireless communications. By rapidly changing the transmission frequency according to a predetermined pseudo-random sequence known only to the transmitter and receiver, it becomes exceedingly difficult for an unauthorized party to intercept or jam the signal. An eavesdropper would need to track the rapid frequency changes to follow the conversation, which is a complex task.

Furthermore, employing skipfrekvens helps to mitigate interference. If a particular frequency is experiencing interference from other devices, the transmitter can simply hop to a different, clearer frequency, allowing the communication to continue uninterrupted. This makes it particularly useful in environments with a high density of wireless devices.

Another benefit is improved spectrum efficiency. By sharing the available radio spectrum among multiple users and dynamically avoiding occupied channels, skipfrekvens can allow for more efficient use of limited radio resources. The "hopping" sequence ensures that each transmission occupies a frequency for a very short duration, minimizing the chance of collision with other transmissions. The speed of hopping can vary greatly, from a few hops per second to thousands of hops per second, depending on the specific application and requirements.