Cellular Networks-Unit 1 and Unit 2 Question Bank for INSEM Exam

 

Question Bank for First Two Units

UNIT -1(FEB-2023)

Q1) a) Draw block diagram to describe each component of Multicarrier Modulation transmitter and receiver. [8] 

b) With neat schematic, draw and explain in detail the MIMO system model. [7] 

OR 

Q2) a) Draw neat diagram and Explain the working operation of OFDM transmitter and receiver with FFT. [8]

 b) Define Spectral Efficiency and Derive an expression for Loss in Spectral Efficiency. [7]

 UNIT -1(MAR-2024)

Q1) a) Define and explain: Path loss, RF signal interference and Fading. [6] 

b) Explain free space propagation model. Also write an equation of received power in free space propagation. [5]

 c) Explain Diversity in Wireless Communications. [4] 

OR 

Q2) a) Compute median loss for large city by considering Hata model at a distance of 3Km with carrier frequency of 2.1 GHz and transmitting and receiving antenna height as 20 m and 2 m respectively. [6] 

b) With neat diagram explain ground reflection in wireless communication system. [5] 

c) Explain channel estimation techniques. [4] 

UNIT -2(FEB-2023)

Q3) a) Derive an relation for least squares estimate in wireless systems. [8]

 b) With neat diagram, describe Ground reflection model for wireless communication. [7] 

OR 

Q4) a) With step by step process, explain how the Link Budget Analysis is prepared in wireless communication. [8] 

b) Derive an expression for Noise power. Compute Median loss for large city by considering HATA model at a distance of 3 km with carrier frequency of 2.1 GHz with transmitting and receiving antenna height as 20 m and 2 m. [7]

 UNIT -2(MAR-2024)

 Q3) a) What is concept of OFDM? List the advantages of OFDM. [5] 

b) Calculate total no. of samples transmitted with cyclic prefix if total no. of subcarrier, N=256 & bandwidth per subcarrier = 15.625 KHz. [5] 

c) What is importance of cyclic prefix in OFDM? [5] 

OR

 Q4) a) Explain block diagram of multicarrier transmission system used in OFDM. [5] 

b) Derive an expression for calculation of BER in OFDM system. [5]

 c) Explain 3×3 MIMO System used in wireless communication. [5]

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