Wireless and Mobile Communications Multiple choice Questions and Answers-Equalization,Diversity and Channel Coding

31.	Stochastic gradient algorithm is also called ________
a.	Zero forcing algorithm
b.	Least mean square algorithm
c.	Recursive least square algorithm
d.	Mean square error algorithm

Discuss

Answer: (b).Least mean square algorithm

32.	Convergence rate of LMS is fast.
a.	True
b.	False
c.	May be True or False
d.	Can't say

Discuss

Answer: (b).False

33.	Which of the following does not hold true for RLS algorithms?
a.	Complex
b.	Adaptive signal processing
c.	Slow convergence rate
d.	Powerful

Discuss

Answer: (c).Slow convergence rate

34.	Which of the following algorithm uses simple programming?
a.	LMS Gradient DFE
b.	FTF algorithm
c.	Fast Kalman DFE
d.	Gradient Lattice DFE

Discuss

Answer: (a).LMS Gradient DFE

35.	Diversity requires a training sequence.
a.	True
b.	False
c.	May be True or False
d.	Can't say

Discuss

Answer: (b).False

36.	Diversity decisions are made by ____________
a.	Receiver
b.	Transmitter
c.	Channel
d.	Adaptive algorithms

Discuss

Answer: (a).Receiver

37.	Small scale fades are characterized by ____________ amplitude fluctuations.
a.	Large
b.	Small
c.	Rapid
d.	Slow

Discuss

Answer: (c).Rapid

38.	____________ is used to prevent deep fade for rapidly varying channel.
a.	Modulation
b.	Demodulation
c.	Macroscopic diversity technique
d.	Microscopic diversity technique

Discuss

Answer: (d).Microscopic diversity technique

39.	Large scale fading can be mitigated with the help of _________
a.	Modulation
b.	Demodulation
c.	Macroscopic diversity technique
d.	Microscopic diversity technique

Discuss

Answer: (c).Macroscopic diversity technique

40.	Space diversity s also known as ________
a.	Antenna diversity
b.	Time diversity
c.	Frequency diversity
d.	Polarization diversity

Discuss

Answer: (a).Antenna diversity