In frekvenciatartás, the transmitter and receiver hop together in a synchronized manner, changing frequencies according to a pre-agreed pattern. This pattern is determined by a pseudo-random number generator, which produces a sequence of numbers that appear random but are actually deterministic. The sequence is known as the hopping sequence, and it determines the order in which the frequencies are used.
The primary advantage of frekvenciatartás is its ability to mitigate interference. By hopping across a wide range of frequencies, the system can avoid narrowband interference and reduce the impact of fading. This makes frekvenciatartás particularly useful in environments with high levels of interference, such as industrial settings or in the presence of other wireless devices.
Another benefit of frekvenciatartás is its ability to support multiple users in the same frequency band. By using a unique hopping sequence for each user, the system can allocate different frequency channels to different users, reducing the likelihood of collisions and improving overall system capacity.
Frekvenciatartás also provides a measure of security. Since the hopping sequence is known only to the communicating devices, an eavesdropper would need to know the sequence to intercept the signal. This makes frekvenciatartás a potential candidate for secure communication systems.
However, frekvenciatartás also has its drawbacks. The rapid switching of frequencies can introduce complexity in the design of the transmitter and receiver, as well as increased power consumption. Additionally, the synchronization of the hopping sequences between the transmitter and receiver can be challenging, particularly in mobile or rapidly changing environments.