Cognitive Code-Division Channelization

Abstract

We consider the problem of simultaneous power and code-channel allocation for a secondary transmitter/receiver pair coexisting with a primary code-division multiple-access (CDMA) system. Our objective is to find the optimum transmitting power and code sequence of the secondary channel that maximize the signal-to-interference-plus-noise ratio (SINR) at the output of the maximum SINR linear receiver, while at the same time the SINR of all primary channels at the output of their max-SINR receiver is maintained above a certain threshold. This is a non-convex NP-hard optimization problem. We propose a novel feasible suboptimum solution using semidefinite programming. Simulation studies illustrate the theoretical developments.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 2011
Accession Number
ADA562486

Entities

People

  • Dimitris A. Pados
  • John D. Matyjas
  • Kanke Gao
  • Stella N. Batalama

Organizations

  • University at Buffalo

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Algorithms
  • Channel Allocation
  • Code Division Multiple Access
  • Cognitive Radio
  • Communication Systems
  • Computer Programming
  • Formal Languages
  • Multiple Access
  • Optimization
  • Random Variables
  • Semidefinite Programming
  • Sequences
  • Simulations
  • Transmitters
  • Wireless Communications

Fields of Study

  • Engineering

Readers

  • Operations Research
  • Radio communications and signal processing.