Performance of Improved Channel Allocation for Multicarrier CDMA with Adaptive Frequency Hopping and Multiuser Detection

Abstract

Subchannel allocation for the reverse link of multicarrier code-division multiplex-access (MC-CDMA) system with adaptive frequency hopping (AFH) is investigated. An efficient allocation method that can be employed with the matched filter (MF) receiver as well as with multiuser detectors (MUDs) by exploiting the appropriate signal to interference and noise ratio (SINR) analysis is described. It is demonstrated that combined improved subcarrier allocation and the linear decorrelating detector (LDD) are very efficient in mitigating multiple-access interference (MAI), resulting in much larger system capacity than for a non-adaptive MC direct-sequence (DS)-CDMA system. This conclusion is confirmed for realistic fading channels with correlated subcarriers and imperfect channel state information (CSI) at the transmitter.

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Document Details

Document Type
Technical Report
Publication Date
Aug 29, 2008
Accession Number
ADA500441

Entities

People

  • Alexandra Duel-hallen
  • Tao Jia

Organizations

  • North Carolina State University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Adaptive Systems
  • Algorithms
  • Carrier Frequencies
  • Channel Allocation
  • Cross Correlation
  • Detection
  • Detectors
  • Doppler Effect
  • Frequency
  • Frequency Agility
  • Gaussian Noise
  • Information Operations
  • Matched Filters
  • Mobile Phones
  • Modulation
  • Multiple Access
  • Radio Equipment

Fields of Study

  • Engineering

Readers

  • Radio communications and signal processing.