Examination of Wavelet Packet Signal Sets for Over-Saturated Multiple Access Communications

Abstract

This paper addresses the problem of signature set design for uncoded multiple access (MA) communication in which user signature waveforms are linearly dependent. In general, the linearly dependent or "over-saturated" scenario requires an exponentially complex detector. The recent introduction of an optimal tree-structured joint detector of extremely low complexity ([1, 2]) has sparked our interest in signature set choice for over-saturated MA communications. The tree detector requires the set of linearly dependent user signatures to have tree-structured cross-correlations. This design guideline is a natural by-product of redundant wavelet packet signals. In this paper we explore, via simulations, the performance of wavelet packet signature sets and find them to do very well in general and to offer promising behavior with the introduction of arbitrary carrier phase.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1996
Accession Number
ADA458905

Entities

People

  • Alan S. Willsky
  • Hamid Krim
  • Rachel E. Learned

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Algorithms
  • Amplitude
  • Carrier Frequencies
  • Communication Systems
  • Computational Complexity
  • Cross Correlation
  • Detection
  • Detectors
  • Massachusetts
  • Modulation
  • Multiple Access
  • Simulations
  • Standards
  • Statistical Algorithms
  • Statistical Analysis
  • Waveforms

Fields of Study

  • Computer science

Readers

  • Image Processing and Computer Vision.
  • Radio communications and signal processing.
  • Systems Analysis and Design