Early - late gate spread spectrum

1. What are the different spread spectrum techniques?
2. What is spread spectrum transmission?
3. What spread spectrum technology is used for mobile cellular communication?

What are the different spread spectrum techniques?

There are two predominant techniques to spread the spectrum: 1) Frequency hoping (FH), which makes the narrow band signal jump in random narrow bands within a larger bandwidth. 2) Direct sequence (DS) which introduces rapid phase transition to the data to make it larger in bandwidth.

What is spread spectrum transmission?

Spread spectrum is a form of wireless communications in which the frequency of the transmitted signal is deliberately varied. This results in a much greater bandwidth than the signal would have if its frequency were not varied.

What spread spectrum technology is used for mobile cellular communication?

Code division multiple access (CDMA) is a form of spread spectrum communications that is being used for, among other applications, some second-generation cellular phone systems (others use TDMA).