What is the spectrum of spread?
The term spread out of the spectrum concerns the method of transmission of the signal in which the signal is intentionally spread by a change in the frequency at which it is sent. There are several advantages, including a wider bandwidth and avoiding objects or other frequencies that could disrupt the original signal. The use of a spread spectrum can also increase the safer signal and prevent it from being captured. When generating a signal, they must usually remain in the same frequency range as the radio station. Tuning to the radio station means radio settings to the same signal frequency; If the frequency changes, the station will also change. It is okay for the signal to remain to the same extent in a situation as a radio station, but in some cases the signal must be either blocked or changed to prevent interference.
The technique of the spread spectrum achieves this goal by changing the signal during its transmission period. TwoCommon ways that change the signal during transmission are frequency mutton and the technique of direct sequences of the spread spectrum. Frequency jumping uses a digital signal that "hops" between the original signal and other frequency. The frequency is the same between the hops, referred to as breaking time. The switching sequence is a complex formula that transmits the signal and the one that accepts both calculate and use to transform the signal to and from the original state.
Direct sequential spectrum technique, which is more reliable, but less efficient, that the frequency sketching works by breaking pieces of data and spreading through the frequency range. The original signal is divided by another signal known as a chip that moves higher speeds. This chip transmits the code responsible for the signal distribution and the location of the information to another frequency range. The same Chip codes use the receiving device to rebuild the signal back into the original form.
Use of spectrum of spread has increased over the yearsas a result of deregulation A, it is used in a wide range of telecommunications and communication fields. It was first used in the military in the 1950s for safe communication and the use expanded at the beginning of the 80s. For use in many satellite communications around the world. More recently, it was used in wireless technologies, including mobile phones and wireless networks.