Cooperative Communications with Multiple Sources

Chapter

Abstract

Previously, we focused on cooperative systems where only one user is allowed to act as the source at any instant in time while the other users serve as relays of the source. However, in multiuser systems, multiple sources may be accessing the cooperative channel simultaneously and, thus, multiple access strategies must be devised to separate their signals in either time, frequency, code, or space. In this chapter, we will examine different multiple access schemes for cooperative communication systems, including time-division multiple access (TDMA), frequency-division multiple access (FDMA), code-division multiple access (CDMA), and space-division multiple access (SDMA) schemes. In TDMA/FDMA systems, sources transmit over orthogonal time or frequency channels, where radio resources must be properly allocated to fully exploit the advantages of cooperation.

Keywords

Covariance Autocorrelation Lution Alloca 

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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Y.-W. Peter Hong
    • 1
  • Wan-Jen Huang
    • 2
  • C.-C. Jay Kuo
    • 3
  1. 1.Department of Electrical EngineeringNational Tsing Hua UniversityHsinchuTaiwan R.O.C.
  2. 2.Institute of Comm. Engin.National Sun Yat-Sen UniversityKaohsiungTaiwan R.O.C.
  3. 3.Viterbi School of EngineeringUniversity of Southern CaliforniaLos AngelesUSA

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