PN-Sequence-Properties.pptx

IT IS THE PN SEQUENCE WHICH IS USED FOR COMMUNICATION

1. BANGALORE INSTITUTE OF TECHNOLOGY K.R.ROAD ,V.V PURA , BANGALORE-560004 DEPARTMENT OF ELECTRONICS AND TELECOMMUNICATION ENGINEERING SUBJECT: WIRELESS COMMUNICATION LAB TOPIC: GENERATION OF PN SEQUENCE PROPERTIES GUIDED BY: PROF.SHRUTHI.N PRESENTED BY: PRAKRUTHI D S

2. PN Sequence Properties In this presentation, we will explore the fascinating properties of PN sequences and their applications. Get ready to dive into the captivating world of pseudorandom numbers!

3. Definition of PN Sequence A PN sequence is a deterministic binary sequence with a pseudorandom appearance. It is generated using a linear feedback shift register (LFSR) and exhibits statistical properties similar to those of random sequences.

4. Properties of PN Sequences 1 Periodicity PN sequences have a maximum period, which is the length of the shift register. 2 Balance They have an equal number of ones and zeros within each period. 3 Auto-correlation PN sequences have low cross-correlation with themselves, making them useful for code division multiple access (CDMA) systems.

5. Periodicity of PN Sequences PN sequences have a unique maximum period determined by the number of stages in the LFSR. This property ensures that the sequence repeats itself after a certain length, which is essential for their application in various fields such as cryptography and spread spectrum communication systems.

6. Auto-correlation of PN Sequences The auto-correlation of PN sequences measures the similarity between a sequence and its shifted version. High auto-correlation values indicate a strong self-similarity, whereas low values imply a pseudorandom behavior. This property makes PN sequences a fundamental tool in coding theory, sequence design, and synchronization.

7. Cross-correlation of PN Sequences The cross-correlation of PN sequences determines the similarity between two different sequences. Cross-correlation values close to zero indicate a low similarity, making PN sequences ideal for reducing interference in communications and optimizing signal processing algorithms.

8. Application of PN Sequences Spread Spectrum Communication PN sequences are used to spread the bandwidth of signals, improving the resistance to interference and enhancing the security of communication systems. Cryptography PN sequences form the basis of keystream generators in stream cipher algorithms, ensuring secure data encryption and decryption. Radar and Sonar PN sequences are employed in radar and sonar systems for target identification, range measurement, and Doppler shift compensation.

9. Conclusion PN sequences are valuable in various fields due to their pseudorandom characteristics and unique properties. Whether it's secure communication, coding theory, or signal processing, these sequences play a crucial role in real-world applications. Exploit the power of PN sequences for enhanced functionality and robustness!

10. THANK YOU