Cognitive CDMA Channelization

Abstract

We consider the problem of simultaneous power and code-channel allocation of a secondary transmitter/receiver pair coexisting with a primary code-division-multiplexed (CDM) system. Our objective is to find the optimum transmitting power and code sequence of the secondary user that maximizes 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 users at the output of their max-SINR receiver is maintained above a certain threshold. This is an NP-hard non-convex optimization problem. In this paper, 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
Mar 01, 2010
Accession Number
ADA517395

Entities

People

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

Organizations

  • University at Buffalo

Tags

DTIC Thesaurus Topics

  • Air Force Research Laboratories
  • Algorithms
  • Code Division Multiplexing
  • Cognitive Radio
  • Computational Complexity
  • Computer Programming
  • Convex Sets
  • Electrical Engineering
  • Electronic Mail
  • Engineering
  • Optimization
  • Random Variables
  • Semidefinite Programming
  • Sequences
  • Signal Processing
  • Simulations
  • Transmitters

Fields of Study

  • Engineering

Readers

  • Operations Research
  • Phased Array Antenna Design.
  • Radar Systems Engineering.

Technology Areas

  • AI & ML
  • AI & ML - Machine Learning Algorithms