UNIT - 6

CDMA Based Mobile Systems

Q1) Explain both the spread spectrum technologies.

Q2) Explain frequency hopping in detail. What is slow frequency hopping (SFH) and fast frequency hopping (FFH)?  

Q3) Explain in details frequency hopping. 

Q4) What is the motivation behind CDMA use?

Q5) With the help of block diagram explain general spread spectrum structure in detail.

Q6) Explain types of FHSS.

Q7) Draw and explain direct sequence spread spectrum in detail.

Q8) Draw and explain DSSS transmitter.

Q9) Draw and explain rake receiver.

Q10) Explain IS 95 in detail.

Q11) Write the frequency range, propagation type and applications of various frequency bands.

Q12) Compare open loop and closed loop power control.

Q13) Write a note on CDMA 2000 and IS 95.