Signals And Communication Systems Previous Year Question Paper - MG University BTech

This is the previous year question paper (2014 May) of signals and communication systems (SCS) paper of BTech Computer Science and Engineering under MG university (MGU).

B.TECH DEGREE EXAMINATION,MAY 2014 Fourth Semester

Branch : Computer Science and Engineering

CS 010 404-SIGNALS AND COMMUNICATION SYSTEMS (CS)

(New Scheme-2010 Admission onwards) [Regular/Improvement/Supplementary]

Time : Three Hours

Maximum:100 Marks

Part A

Answer all questions.

Each question carries 3 marks.

1. Enumerate the properties of the signals. Explain any two.
2. Define and explain Noise. List the types of noise
3. What is the difference between PPM and PDM ? Explain in detail.
4. What is the principle of WDM ? Mention the types of WDM.
5. Explain the properties of hamming codes.

(5*3=15 marks)

Part B

Answer all questions.

Each question carries 5 marks.

6. Define and explain CTFS .
7. Differentiate Twisted pair from coaxial cables. Explain.
8. What is OOK ? Bring out its mathematical representation .
9. Explain the principles of Half and Full duplex transmissions with neat diagrams.
10. Give an account on "Baudot code".

(5*5=25 marks)

Part C

Answer all questions.

Each full question carries 12 marks.

11. (i) State and explain sampling theorem.
(ii) Prove the properties of CTFS.

Or

12. Differentiate continuous time signals from discrete time signals with examples. Explain the difference.


13. Define and explain typical parameters of communication systems.

Or

14. State and explain Shannon Hartley theorem. Derive an expression for Channel capacity of a Noisy channel.


15. Explain AM,PM and FM in detail with neat diagrams. Bring out their mathematical representations.

Or

16. Compare and contrast the parameters of different modulation formats. Explain the comparison in detail.


17. Explain the principles of TDM and FDM in detail with neat diagrams .

Or

18. Explain the basic concept of SONET with neat diagrams.


19. Explain the properties and advantages of Linear block codes. Drive its code vector.

Or

20. Write technical notes on:
(i) EBCDIC
(ii) Parity coding
(iii) Syndrome calculator.

(5*12=60 marks)

How to Hard Reset Lenovo Tab 2 (A7-10, A7-20, A7-30, A7-40 and A7-50 tablets)

This post explains how to hard reset Lenovo tablet  called Lenovo tab 2. There are many variants for Lenovo tab 2. Some of them are Lenovo tab 2 A7-10, A7-20, A7-30, A7-40, A7-50 tabs. These Lenovo tablets follow a common method for hard reset. We will tell you how to hard reset Lenovo tab 2. This post also answers the following questions too:

• How to factory reset Lenovo tab 2
• How to erase all data on Lenovo tab 2
• How to boost speed of Lenovo tab 2
• How to unlock locked Lenovo tab 2
• How to remove pattern lock of Lenovo tab 2
• How to restore Lenovo tab 2 if password is lost or forgotten

Here, we will see how to hard reset Lenovo tab 2 A7-30 A3300. All other versions of Lenovo tab 2 mentioned above can be reset similarly. But we recommend to watch the following video before you proceed.




NB: Don't forget to backup everything important including contacts and files.

Steps:

1. Open Settings
2. Select Backup and Restore
3. Select Factory Data Reset
4. Read the information on the screen carefully, then click Reset Tablet
5. Enter Lock-screen password if asked
6. Click Erase Everything

Simple Trick to Remember Values of Sin, Cos and Tan Functions for angles 0, 30, 45, 60 and 90 Degrees

If you are studying mathematics, you will has to use mathematical functions line sin, cos, tan etc. These trigonometric function are used in many other subjects like physics also. Functions sinx, cosx and tanx takes angles as input. Angles 0, 30, 45, 60 and 90 degrees are most commonly used angles values. Thus most students will have to rememeber the values of sin0, sin30, sin45, sin60, sin90, cos0, cos30, cos45, cos60, cos90, tan0, tan30, tan45, tan60 and tan90. If you know values of sinx and cosx you can find value of tanx by dividing sinx by cosx. tanx=sinx/cosx.

Here is a simple trick to remember all the above values. This is a simple and easy trick to remember the values of trigonometric functions sinx, cosx and tanx for angles (in degrees) 0, 30, 45, 60 and 90. The following image will tell you how to get the values of sinx and cosx function for above values of x in degrees in 3 simple steps. To get tanx, just divide sinx by cosx. Since the image is self explaining, i am just adding the image below.

trick to remember values of sinx, cosx functions

Top 19 Weird Place Names in the World

Some place names are really strange and some are funny too. Also there are some stupid place names. For the sake of decency, i won't mention those indecent place names. But i will tell you about some weird but decent place names. Some of those bizarre place names are listed below. You may also watch the video.

1. Pooh
   Pooh or Poo (also spelled as Puh) is a small town in Kinnaur district, Himachal Pradesh, India. The name of this place have same spelling as the exclamatory word used to express used to express disgust, impatience or contempt.
   
   

   

   Pooh Milestone

2. Husband
   This funny named place is from Somerset township in Pennsylvania state of united states of america.
   

   

   Husband from Pennsylvania

3. Lonelyville
   Lonelyville is a small beach community located in the western end of Fire Island in the Town of Islip in Suffolk County, New York, United States. It seems the people in Lonelyville are feeling lonely.
   

   

   Lonely Lonelyville from Fire Island

4. Condemned Bar
Condemned Bar is a former settlement in Yuba County, California. It lay at the confluence of Dobbins Creek and the Yuba River 3 miles south-southeast of Dobbins, at an elevation of 548 feet.



Condemned Bar

5. HellHell, or Hiland Lake, is an unincorporated community in Putnam Township of Livingston County in the U.S. state of Michigan. I don't understand what made them name the place so.
   
   

   

   Hell in America

6. Oatmeal
   Oatmeal is an unincorporated community in Burnet County, Texas, United States. Do the inhabitants eat only oats?
   

   

   Oatmeal from USA

7. SandwichSandwich is a town in Barnstable County, Massachusetts, United States having about 20,000 population. Who is so fond of sandwich there?
   
   

   

   Sandwich !

8. BoringBoring? Yes it is really boring. Boring is an unincorporated community located in Clackamas County, Oregon state, United States. If you are boring, it is the right place to go.
   
   

   

   Boring

9. Bird in HandBird-in-Hand, Pennsylvania is a census-designated place in Lancaster County, Pennsylvania, United States. The place is named for a picture on an old hotel's swinging sign.
   
   

   

   Bird in Hand

10. Happy Land
    If you are done with boring, you may go straight to Happy Land. Happy Land is also in United States. Happyland is an unincorporated community in Pontotoc County, Oklahoma, in the United States.
    
    

    

    Happy Land from the same country with Boring

    
    
11. Nowhere Else
    Nowhere else you can see such a place except in Australia. I am talking about Nowhere Else, not nowhere else. It is Nowhere Else, a place in Australia.
    
    

    

    Wanna go Nowhere Else?

12. Erode
    We are not talking about erosion. Our concern is about Erode. Yeah, the proper noun Eorde, not the verb. Erode is a place in Tamil Nadu state of India.
    
    

    

    Erode Junction

13. Accident
    It may not be an accident to name the place so. Actually, it is heard that it was an accident which made people name the place so. Whatever, isn't it funny to hear, 'Welcome to Accident'?
    

    

    Accident

    

    Hearty welcome to Accident!

    
    
14. Pity Me
    What a pity! Pity Me is a suburban village of Durham, England.
    

    

    Pity Me, England

15. Kala Bakra
    Kala Bakra means black goat in Hindi. There is a place named Kala Bakra in India. Kala Bakra village comes under the Bhogpur development block of Jalandhar. Jalandhar is a district in the Indian state of Punjab.
    
    

    

    Kala Bakra

    
    

    

    Kala Bakra

16. Why
    I am wondering Why they named Why? Why Why is named so? Why is a tiny unincorporated rural community in Pima County, Arizona, United States.
    
    

    

    Why goto Why?

17. Disco
    Disco is also a place name. Disco is another unincorporated community in Blount County, Tennessee, United States.
    
    

    

    Disco, Tennessee

    
    
18. Loafers Glory
    If you are really a loafer, it may be the right place for you. It seems that being idle makes you glorious there. Loafers Glory is an unincorporated community in Mitchell County, North Carolina, United States.
    

    

    Loafers rejoice, Loafers Glory welcomes you

19. Handsome Eddy
    They don't mind to shout Eddy is really handsome. Handsome Eddy is a hamlet in Sullivan County, New York, in the United States.
    
    

    

Place Names that Sound Funny in Malayalam

In this post we will see some place name that sounds funny for malayalees. Some are from Kerala while some others are in places speaking different languages. Whatever, if you hear those names you will feel funny (only if you are a malayali (Keralite).

I am adding photos of boards placed on roadsides displaying the place name.

Alia vada or Aliya bada is a place in Gujarat state.

Ammaiyappan is a place in Tamil Nadu state. The name sounds just like the Malayalam word for father-in-law.

It is a place in in Makkah of Saudi Arabia. Actually the first letter in the Arabic of the place name is different from the Malayalam letter അ.

This is also a place from Tamil Nadu.

I don't know where this place is. But the name is awesome!

The place ha ha or road with name ha ha is from UK.

Vellamadi is a place in Kerala in Kannur or Kasargod district

Manthuka is place near Pathanamthitta.

How to Block Ads and Popups on Mozilla Firefox Browser

Tired of annoying ads on your Mozilla Firefox? Get rid of the ads yourself. But remember that, for almost all websites, ads are the only source of income. If everyone removes ads from websites, nothing will be available for free in internet anymore. You can simply block all ads in your Firefox browser yourself. To block ads on firefox browser, click on the menu button  in the top left corner of browser. Then select Add-ons in the menu. Then click Extensions. Then search adblock in the webpages that loads next. Click Install to the right of Adblock Plus in the results. Wait for a while, until the extension is downloaded. When download is complete, adblocker will get installed soon. Thus ad blocker is now installed on your firefox browser. If you still see any ads displayed, right click on it and select AdBlock plus-> Block this ad.  For details watch the following video.

How to Block Advertisements on Opera Browser

Tired of annoying ads on your opera browser? Get rid of the ads yourself. But remember that, for almost all websites, ads are the only source of income. If everyone removes ads from websites, nothing will be available for free in internet anymore. You can simply block all ads in your Opera browser yourself. To block ads on Opera browser, click on the Opera button in the top left corner of browser. Then select Get extensions in menu. Then click Extensions. Then search adblock in the webpages that loads next. Click AdBlock plus in the results. Then click Add to Opera button on the page that loads. Wait for a while until the extension is installed. Thus ad blocker is now installed on your Opera browser. If you still see any ads displayed, right click on it and select AdBlock plus-> Block this ad.  For details watch the following video.

How to Block Ads in Google Chrome Browser

Tired of annoying ads in Google Chrome? Get rid of the ads yourself. But remember that, for almost all websites, ads are the only source of income. If everyone removes ads from websites, nothing will be available for free in internet anymore. You can simply block all ads in your Google Chrome browser yourself. To block ads on Google Chrome browser, click on the button  in the top right corner of browser. Then select settings. Then click Extensions. Now, click Get more extensions. Then search adblock in the webpages that loads. Click Extensions on the left. Then click Add to chrome button on the right side of AdBlock. Wait for a while until a small file is downloaded. The chrome browser will open the file itself and install ad blocker. Thus ad blocker is installed in your google chrome browser. If you still see any ads displayed, right click on it and select AdBlock -> Block this ad.

Design and Analysis of Algorithms - Lecture Notes and Slides Free Download

Lecture notes as doc files and ppt slides for design and analysis of algorithms for free download.

Download Modulewise full notes set 1 for Design and Analysis of Algorithms as zip

Download Modulewise full notes set 2 for Design and Analysis of Algorithms as zip

Module I 

Introduction and Complexity

What is an algorithm – Properties of an Algorithm, Development of an algorithm, Pseudo-code Conventions, Recursive Algorithms – Performance Analysis - Space and Time Complexity –Asymptotic Notations – ‘Oh’, ‘Omega’, ‘Theta’, Worst, Best and Average Case Complexity, Running Time Comparison, Common Complexity Functions -Recurrence Relations – Solving Recurrences using Iteration and Recurrence Trees – Example Problems – Profiling - Amortized Complexity.

Module 1 - Introduction PPT Download

Module 1 - Non determinestic Algorithms PPT Slides

Module 1 - Lecture note PDF download

 Module II 

Divide and Conquer - Control Abstraction, Finding Maximum and Minimum, Costs associated element comparisons and index comparisons, Binary Search, Divide and Conquer Matrix Multiplication, Stressen’s Matrix Multiplication, Quick Sort, Merge Sort. – Refinements.

Module 2 - Divide and conquer PPT slides

Module III 

Greedy Strategy - Control Abstraction, General Knapsack Problem, Minimum Cost Spanning Trees – PRIM’s Algorithm, Kruskal’s Algorithm, Job sequencing with deadlines.

Dynamic Programming - Principle of Optimality, Multistage Graph Problem, Forward Approach, Backward Approach, All-Pairs Shortest Paths, Traveling Salesman Problem.

Module 3 Greedy algorithms - PPT slides
Module 3 - Dynamic programming final ppt slide
Knapsack problem doc

Module IV

 Backtracking – State Space Tree - Fixed Tuple and Variable Tuple Formulation - Control Abstraction – Generating Function and Bounding Function - Efficiency of the method - Monte Carlo Method – N-Queens Problem, Sum of Subsets.

Branch and Bound Techniques – FIFO, LIFO, and LC Control Abstractions, 15-puzzle.

Module 4- Backtracking ppt slide
Module 4 - Branch and bound techniques slide ppt

Module V

Sophisticated Algorithms - Approximation Algorithms – Planar Graph Coloring, Vertex cover - String Matching Algorithms – Rabin Karp algorithm - Topological Sort - Deterministic and Non-Deterministic Algorithms.

Lower Bound Theory - Comparison Trees for Searching and Sorting, lower bound on comparison based algorithms, Sorting, Selection  & Merging; Oracles and Adversary Arguments –Merging,Basic concepts of randomized algorithm-Las Vagas algorithm for search.

Module 5 - Lowerbound slides ppt