Sagedusvahetusega

Sagedusvahetusega, meaning frequency hopping in Estonian, is a spread spectrum radio technology. It works by rapidly changing the carrier frequency of a radio signal according to a pseudorandom sequence. This sequence is known to both the transmitter and the receiver.

The primary advantage of frequency hopping is its robustness against interference and jamming. By hopping across a wide range of frequencies, the signal is less susceptible to a single narrowband jammer. If interference occurs on one frequency, the signal quickly moves to another, minimizing the impact. This also makes it harder to detect and intercept the signal, as an eavesdropper would need to track the rapid frequency changes.

Frequency hopping spread spectrum (FHSS) is used in various applications. It is commonly found in wireless communication systems like Bluetooth, where it helps to avoid interference with other devices operating in the same 2.4 GHz band. It is also employed in military communication systems for secure and resilient transmissions, and in some cordless phones and other wireless networking technologies. The hopping pattern is crucial for the security and performance of the system, and the speed of the hops can vary depending on the specific application.