Performance of punctured convolutional codes in asynchronous CDMA communications under perfect phase-tracking conditions

Authors:
Vidhyacharan Bhaskar;Laurie L. Joiner
Affiliations:
Departement Genie des Systemes d'Information et de Telecommunication, Universite de Technologie de Troyes, 12 rue Marie Curie, 10010 Troyes Cedex, France;Department of Electrical and Computer Engineering, University of Alabama in Huntsville, Huntsville, AL 35899, USA
Venue:
Computers and Electrical Engineering
Year:
2004

Citing 2
Cited 2

Error control systems for digital communication and storage

Error control systems for digital communication and storage
Wireless Communications: Principles and Practice

Wireless Communications: Principles and Practice

Performance of convolutional codes in asynchronous CDMA communications under imperfect phase-tracking conditions

IEEE Transactions on Communications
Performance of Convolutional Codes in A-CDMA Systems over Time-Varying Rician Fading Channels

Wireless Personal Communications: An International Journal

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Abstract

In this paper, the performance of punctured convolutional codes of short constraint lengths is discussed. The punctured codes are used to provide error protection to a particular user in an asynchronous code division multiple access (A-CDMA) system. Perfect channel estimation is assumed at the receiver. A slow fading Rician or Rayleigh channel is assumed. Maximum likelihood decoding through a Viterbi algorithm is used to decode the received symbols. Soft decision decoding for perfect phase tracking of the received signal is considered. Analytical bounds, which are useful in predicting the performance of the A-CDMA system are derived and plotted for the cases of infinite and finite channel memory. The upper bounds with Viterbi decoding are derived and plotted for the various punctured codes considered. The simulated results are found to agree very well with their upper bounds and predicted results.