UNIT INSTRUMENT DEMONSTRATION OF CRC GENERATION

1. UNIT INSTRUMENT DEMONSTRATION OF CRC GENERATION Imran Shafique Ansari 246808 Saif Ahmad 237903 Ahmad Qutb Al-Deen 232563

2. OUTLINE • Introduction • Implemented Technique • Description of The Implementation • Demonstration of the Implementation • Conclusion

3. INTRODUCTION • Cyclic Redundancy Check (CRC) Input: Data Stream of Unlimited Length. Output: Fixed Size Of Data and Remainder. • Similar to Long Division, No Curry. • Advantages: • Simple to implement. • Easy to analyze mathematically. • Detects common errors. • Detects Burst Errors.

4. OUTLINE • Introduction • Implemented Technique • Description of The Implementation • Demonstration of the Implementation • Conclusion

5. IMPLEMENTAION TECHNIQUE • Shift Registers • Length = Length (Divisor) - 1 • XOR Gates – Bit in the Divisor = 1 • Loaded with 0’s at the beginning • MSD – Feedback bit • Data bits – LSD, 1 by 1 • 0’s – End of data bits • Final value (Shift Register) = remainder

6. IMPLEMENTAION TECHNIQUE • Remainder ↔ 0’s, end of data → Transmitted Bit Stream • Tx & Rx – same shift register • Rx – Loads shift registers with 0’s • Final Value = 0’s → Valid CRC Code

7. OUTLINE • Introduction • Implemented Technique • Description of The Implementation • Demonstration of the Implementation • Conclusion

8. DESCRIPTION OF THE IMPLEMENTATION Checking of Inputs.

9. DESCRIPTION OF THE IMPLEMENTATION Generation of FCS

10. DESCRIPTION OF THE IMPLEMENTATION Introducing Error in The Transmitted Data

11. DESCRIPTION OF THE IMPLEMENTATION Remainder Calculation

12. DESCRIPTION OF THE IMPLEMENTATION Data Verification

13. OUTLINE • Introduction • Implemented Technique • Description of The Implementation • Demonstration of the Implementation • Conclusion

14. Demonstration of the Implementation

15. Conclusion • Efficient Error Detection Technique. • New Software [LabVIEW]. • Implement Theoretical Technique to Analytical. • Understanding of The Process of CRC.

16. QUESTIONS