Time Left - 15:00 mins

GATE EC 2020: Communication System Quiz 9 (App update required to attempt this test)

Attempt now to get your rank among 481 students!

Question 1

Match the following List-I with List-II
List-I
A) PCM
B) FSK
C) Asynchronous TDM
D) DM
List-II
1) Telegraphy
2) Pulse shifting
3) Simple circuit
4) Companding
5) Threshold effect

Question 2

In a code-division multiple access (CDMA) system with N = 8 chips, the maximum number of users who can be assigned mutually orthogonal signature sequences is ________

Question 3

Twenty four voice signals are sampled uniformly at a rate of 8 KHz and then time division multiplexed. The sampling process uses flat top samples with 1 Hs. Duration. The multiplexing operation includes provision for synchronization by adding and extra pulse of 1 us duration. The spacing b/w successive pulses of the multiplexed signal is

Question 4

The raised cosine pulse p(t) is used for zero ISI in digital communications. The expression for p(t) with unity roll-off factor is given by . The value of p(t) at is:

Question 5

Three analog signals having band width 1200 Hz, 600 Hz and 600 Hz are sampled at their respective Nyquist Rates, encoded with 12 bit words and time division multiplexed. The bit rate for the multiplexed signal is

Question 6

A band limited signal of 3.4 KHz is sampled at 8 KHz and pulse code modulated using 64 quantization levels. Ten such signals

are time division multiplexed (TDMed) using one 5-bit synchronizing word every alternate frame. Calculate minimum channel bandwidth

required for transmission of the TDM signal (in MHz)

481 attempts
2 upvotes
2 comments

Tags :

ESE & GATE EC Communications

Jun 7ESE & GATE EC