Forward error correction and design of spread spectrum based multiple access networks

  • Authors:

  • Sanjay Gupta

  • Affiliations:

  • Department of Electrical and Computer Engineering, Illinois Institute of Technology, 3301 S. Dearborn Street, Chicago, IL 60616, USA

  • Venue:
  • Computer Communications
  • Year:
  • 1997

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Abstract

Spread spectrum technology is a natural choice for use in wireless multiple access networks. This paper addresses the problem of performance evaluation and design of spread spectrum based multiple access networks when forward error correction is employed. Although the use of forward error correction increases the probability of a transmission being received successfully, the effective throughput is decreased due to the increased number of redundant bits that are needed. Using an equilibrium point analysis we develop approximations for performance measures of interest. Asymptotic approximations that require reduced computational effort are also developed. We characterize the interaction between key system parameters and determine the amount of forward error correction that should be provided. Trade-offs involved in designing spread spectrum based multiple access networks that are stable and deliver high throughput while maintaining minimal delays are highlighted. Extensive numerical results are presented in the paper.