taajuushyörittelyä

Taajuushyörittely is a Finnish term that translates to "frequency hopping" in English. It is a spread spectrum radio communication technique used to protect a radio signal from interference and detection. In frequency hopping, the transmitted frequency is changed rapidly and pseudo-randomly over a wide range of frequencies. The transmitter and receiver are synchronized and use the same pseudo-random sequence to hop between frequencies. This makes it difficult for an unauthorized listener to intercept the signal because they would need to know the hopping sequence and be able to follow the rapid frequency changes.

The primary benefits of frequency hopping include increased security and resistance to jamming. By constantly changing frequencies, it becomes challenging for an enemy to disrupt communications or locate the transmitter. This technique is particularly useful in military and secure communication systems. It is also employed in some commercial wireless technologies like Bluetooth, where it helps to avoid interference from other devices operating in the same frequency bands. The hopping rate can vary significantly, from a few hops per second to thousands of hops per second, depending on the specific application and security requirements. The design of the hopping sequence is crucial for the effectiveness of the system.