Simulation and Spectral Analysis of the Scrambler for 56Kbps Modem

Authors:
Davinder Pal Sharma;Jasvir Singh
Affiliations:
VLSI Research Laboratory, Department of Physics, The University of the West Indies, St. Augustine, Trinidad and Tobago;Faculty of Engineering, Department of Electronics Technology, Guru Nanak Dev University, Amritsar, India
Venue:
Journal of Signal Processing Systems
Year:
2012

Citing 3
Cited 0

Practical data communications

Practical data communications
Reconstruction of a Linear Scrambler

IEEE Transactions on Computers
Communication System Design Using DSP Algorithms: With Laboratory Experiments for the TMS320C6713 DSK

Communication System Design Using DSP Algorithms: With Laboratory Experiments for the TMS320C6713 DSK

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Abstract

Scrambler is a device that performs one-to-one mapping between input data bits and channel codes. It is used in synchronous data communication systems to retrieve timing information from the received data i.e. to aid synchronization between two modems. Present paper deals with the computer-aided simulation and spectral analysis of the scrambler to be used in 56Kbps voice-band modem. Matlab has been used for simulation and pre-spectral analysis including power spectral density, cross-correlation and auto-correlation. Implementation of scrambler has been done on Texas Instrument's TMS320C50 digital signal processor (DSP) and post- spectral analysis has been performed using Signalogic DSP software. Simulated and practical results have been found identical, which ensures the successful implementation of scrambler.