PresentationDIGITAL SIGNAL TRANSMISSION USING MULTILEVEL NRZ LINE CODE

DIGITAL SIGNAL TRANSMISSION USING MULTILEVEL NRZ LINE CODE: 

DIGITAL SIGNAL TRANSMISSION USING MULTILEVEL NRZ LINE CODE Thursday, 04 August 2011 1 NMIMS University, MPSTME Presented by: Pranay N. Arya, Prashant V. Gaikar. Students B.Tech 3 rd Year EXTC, MPSTME, NMIMS Under The Guidance Of Prof. Vaishali Kulkarni. Associate Professor EXTC, MPSTME, NMIMS

Overview: 

Overview Digital Transmission Coding Techniques Line Coding Proposed Multilevel NRZ Line Code Power Spectral Density Proposed Circuit for generation Line Code Advantages Disadvantages Conclusion Thursday, 04 August 2011 2 NMIMS University, MPSTME

Analog to Digital Conversion: 

Analog to Digital Conversion Thursday, 04 August 2011 3 NMIMS University, MPSTME

Coding Techniques: 

Coding Techniques Coding Technique Source Coding Line Coding Error Correction Coding Thursday, 04 August 2011 4 NMIMS University, MPSTME

Line Coding: 

Line Coding Line codes are used since the introduction of the old telephone systems. They are used in many applications for data storage in multimedia systems and telecommunication networks. Thursday, 04 August 2011 5 NMIMS University, MPSTME

Desirable Properties In A Line Code: 

Desirable Properties In A Line Code Self-Clocking Information Minimum Power Requirement Transparency Error detection and correction capabilities Encoding and decoding complexities with their circuits Cost of circuitry. Thursday, 04 August 2011 6 NMIMS University, MPSTME

Existing Line Codes: 

Existing Line Codes Polar Non Return To Zero Polar Return To Zero Unipolar Non Return To Zero Unipolar Return To Zero Bipolar Non Return To Zero Bipolar Return To Zero / Alternate Mask Inversion Return To Zero ( RZ – AMI ) Manchester Thursday, 04 August 2011 7 NMIMS University, MPSTME

PROPOSED MULTILEVEL NRZ LINE CODE: 

PROPOSED MULTILEVEL NRZ LINE CODE Thursday, 04 August 2011 8 NMIMS University, MPSTME

MULTILEVEL NRZ LINE CODE: 

The mathematical representation of Multilevel NRZ Line Code is given by MULTILEVEL NRZ LINE CODE For a k = 0 For a k = 1 Thursday, 04 August 2011 9 NMIMS University, MPSTME

Power Spectral Density: 

Power Spectral Density The Power Spectral Density is given by the formula The Power Spectral Density of Multilevel NRZ line code is given by the formula Thursday, 04 August 2011 10 NMIMS University, MPSTME

Power Spectral Density: 

Power Spectral Density Thursday, 04 August 2011 11 NMIMS University, MPSTME

Proposed Circuit Diagram: 

Proposed Circuit Diagram Thursday, 04 August 2011 12 NMIMS University, MPSTME

Advantages: 

Advantages There is a transition of the D.C. amplitude level in the Coded Waveform after every T b /2 time period irrespective of the data transmitted, thus making Timing Extraction easy. Thus irrespective of the number of Zeros and Ones transmitted in any possible combination the VCO is able to reproduce the waveform without being in the idle condition Thursday, 04 August 2011 13 NMIMS University, MPSTME

Advantages: 

Advantages The Repeater Circuit requires the Timing Information which is easily acquired if this Coding Technique is implemented. If Multilevel NRZ coding technique is implemented we don’t need to add extra voltage levels like in HDBN and BZ8s coding techniques. Helps in adding another layer of security to the encrypted signal Thursday, 04 August 2011 14 NMIMS University, MPSTME

Disadvantages: 

Disadvantages Multiple D.C. Transition Levels Intersymbol Interference effect Thursday, 04 August 2011 15 NMIMS University, MPSTME

Basic Steps Involved in Signal Transmission: 

Basic Steps Involved in Signal Transmission Thursday, 04 August 2011 16 NMIMS University, MPSTME

Conclusion: 

Conclusion A Multilevel NRZ coding technique has been proposed, which helps in removing certain problems associated with the existing line coding techniques. A circuit for generation of Multilevel NRZ Line Code has been proposed. Thursday, 04 August 2011 17 NMIMS University, MPSTME

For Details: 

For Details Refer “Digital Signal Transmission Using Multilevel NRZ Coding Technique.” Links: http://www.ijcaonline.org/proceedings/ictsm/number4/2802-217 http://www.springerlink.com/content/n12gr24h06277276/ Contact: pranay1990@gmail.com, prashant900@rocketmail.com, vaishalikulkarni6@yahoo.com Thursday, 04 August 2011 18 NMIMS University, MPSTME

Slide 19: 

This research work is only available for research and non commercial purposes. Commercial distribution or any act related to commercial use of this paper is strictly prohibited. A clear acknowledgement should be made for any public work based on the Digital Signal Transmission Using Multilevel NRZ Coding Technique . A citation to Digital Signal Transmission Using Multilevel NRZ Coding Technique , http://www.ijcaonline.org/proceedings/ictsm/number4/2802-217 and http://www.springerlink.com/content/n12gr24h06277276/ and our related works must be added in the references. A soft copy of any released or public documents that use this research work must be forwarded to: pranay1990@gmail.com Thursday, 04 August 2011 NMIMS University, MPSTME 19

THANK YOU: 

THANK YOU Thursday, 04 August 2011 20 NMIMS University, MPSTME