Discrete-time model of 2-user CDMA system, recovered information at receiver using polarity detection?

1. How many types of spread spectrum techniques are used in CDMA?
2. What are the two common spread spectrum techniques used to transmit signals?
3. What are the 3 varieties of spread spectrum?
4. Which is better for avoiding jamming?

How many types of spread spectrum techniques are used in CDMA?

The DS-CDMA system uses two types of spreading sequences, i.e., PN sequences and orthogonal codes. As mentioned above, the PN sequenc is generated by the pseudo-random noise generator.

What are the two common spread spectrum techniques used to transmit signals?

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 are the 3 varieties of spread spectrum?

Frequency-hopping spread spectrum (FHSS), direct-sequence spread spectrum (DSSS), time-hopping spread spectrum (THSS), chirp spread spectrum (CSS), and combinations of these techniques are forms of spread spectrum.

Which is better for avoiding jamming?

Which is better for avoiding jamming? Explanation: Frequency hopping spread spectrum is better for avoiding jamming.