B.TECH - Semester 6 digital communication Question Paper 2020 (sep)
Practice authentic previous year university questions for better exam preparation.
Sample Questions
- How the companding reduces the quantization noise? Discuss with the help of necessary equations.
- Why the raised cosine filters are necessary for ideal Nyquist channel?
- How the equalizer improves the data transmission performance?
- Derive the expression for Euclidean distance.
- Express the received signal $x(t)$ interms of signal vector $x_{j}$ and $w_{j}$ where $w(t)$ is the random variable due to channel noise.
- Give the functional model of passband data transmission system and explain briefly.
- What is Jamming margin? Explain.
- What is fading? Give the reasons for fading.
- Discus about different types of diversity techniques.
- A computer outputs binary data at the rate of 50 kbps that is transmitted using a base band binary PAM system, which is designed to have a raised cosine pulse spectrum. Find the transmission bandwidth required for roll off factor $\alpha=0.4$. ( $\ma...
- State and prove sampling theorem for low pass signals.
- Describe the working principle of Delta Modulation (DM) with the help of necessary equations.
- The 0010110 are applied to the input of a duo binary system. Construct the duo binary coder output and corresponding receiver output with a pre-coder.
- Derive the expression for average Probability of Symbol Error Pe.
- Briefly discuss about Maximum Likelihood detection process.
- Give the coder and decoder for non coherent orthogonal modulation system.
- Describe the working of FHSS coder and decoder with the help of suitable block diagram.
- Briefly discuss about different types of multiple access techniques.
- What is a RAKE receiver? Discuss the working principle of the same with the help of block diagram.