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Cooperative communication with power allocation in downlink CDMA networks

Abdizadeh, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1109/ATC.2009.5349431
  3. Abstract:
  4. In this paper, we study the downlink of cooperative Direct-Sequence Code Division Multiple Access (DS-CDMA), where a set of Mobile Terminals (MT) are cooperating with the purpose of improving their downlink communications reliability with the Base Station (BS). In order to achieve the spatial diversity, a new cooperation scenario is proposed. Afterward, in addition to multiuser precoding, Maximum Ratio Combining (MRC) according to the Maximum Signal to Noise Ratio (MSNR) criterion at the destination is investigated. Then, the optimal transmission power control strategy under a fixed total power constraint is illustrated and analyzed. Compared with equal transmission power assignment where BS and cooperative terminals transmit with same power, the proposed power allocation strategy enables significant performance gain at the destination. ©2009 IEEE
  5. Keywords:
  6. Cooperative communication ; Direct sequence code division multiple access ; Downlink CDMA ; Downlink communications ; Maximum ratio combining ; Mobile terminal ; Multi-user precoding ; Optimal transmission ; Performance Gain ; Power allocation strategies ; Power allocations ; Spatial diversity ; Total power ; Transmission power ; Beamforming ; Code division multiple access ; Signal to noise ratio ; Turbo codes ; Wireless sensor networks ; Communication
  7. Source: ATC 2009 - Proceedings of the 2009 International Conference on Advanced Technologies for Communications, 12 October 2009 through 14 October 2009, Hai Phong ; 2009 , Pages 284-288 ; 9781424451395 (ISBN)
  8. URL: http://ieeexplore.ieee.org/document/5349431