Punjab State Board of Technical Education and Industrial Training 2011 Diploma Electronics and Communication Wireless and mobile communication - Question Paper

part A [15]

Q.1 Do as directed.

i. TDMA stands for _________.
ii._________ controls the transmitted power levels at both the cell sites and the mobile units.
iii. __________ air interface provides the physical link ranging from the mobile and the network.
iv. GPRS stands for __________.
v. __________ shape of cell given the maximum processing density then any other geometrical shape.
vi. In pico cells, the cell size varies from __________.
vii. SIM stands for __________.
viii. __________ is simple land mobile radio system to solve the all times, all places and all people communication issues.
ix. The transmission power of blue tooth is up to __________ MW.
x. RDFI stands for __________.



part B [5*6]

Q.2. Attempt any 5 ques..

i. discuss the basic concept of cellular telephone system.

ii.Explain the subsequent
a) Cell splitting
b) Frequency reuse

iii.Discuss the basic concept of adjacent channel interface.

iv. provide the comparison of FDMA, TDMA and CDMA.

v. discuss the operation of GPRS system.

vi. explain how hi-fi works.

vii. discuss spread spectrum multiple access system.



part C [3*10]

Q.3. Attempt any 3 ques..

i. discuss the following:
a) GSM
B) RDFI

ii.Discuss time division multiple access technique.

iii. discuss the subsequent propagation considerations
a) Fading
b) Doppler effect.

iv. Write short note on any two
a) Cell sectoring
b) Blue tooth.

v. Working of AMPS phone system.

Earning:   Approval pending.