TR2010-033

Demodulate-and-Forward Relaying with Higher Order Modulations: Impact of Channel State Uncertainty


    •  Annavajjala, R., Maaref, A., Zhang, J., "Demodulate-and-Forward Relaying with Higher Order Modulations: Impact of Channel State Uncertainty", IEEE International Conference on Communications (ICC), DOI: 10.1109/​ICC.2010.5502353, May 2010, pp. 1-5.
      BibTeX TR2010-033 PDF
      • @inproceedings{Annavajjala2010may,
      • author = {Annavajjala, R. and Maaref, A. and Zhang, J.},
      • title = {Demodulate-and-Forward Relaying with Higher Order Modulations: Impact of Channel State Uncertainty},
      • booktitle = {IEEE International Conference on Communications (ICC)},
      • year = 2010,
      • pages = {1--5},
      • month = may,
      • doi = {10.1109/ICC.2010.5502353},
      • url = {https://www.merl.com/publications/TR2010-033}
      • }
  • MERL Contact:
  • Research Area:

    Communications

Abstract:

In this paper, we study the impact of uncertain channel state information (CSI) on the performance of demodulate-and-forward relaying protocols with higher order modulation formats such as pulse-amplitude modulation (PAM) and rectangular quardrature-amplitude modulation (QAM). Assuming a single source and a single destination node assisted by N relay nodes, we study the average bit error probability (BEP) performance of M-ary PAM and rectangular QAM constellations with Gray code mapping and imperfect CSI at the relay nodes as well as the destination. The main contributions of this paper are the derivation of closed-form expressions for a)the cumulative distribution functions of the demodulator test statistics, b) the transition probability of error at a given relay, and c) the average BEP for independent and not necessarily identically distributed Rayleigh fading channels with imperfect receiver CSI.

 

  • Related News & Events

    •  NEWS    ICC 2010: 8 publications by Chunjie Duan, Jianlin Guo, Jinyun Zhang and Zafer Sahinoglu
      Date: May 23, 2010
      Where: IEEE International Conference on Communications (ICC)
      MERL Contacts: Jianlin Guo; Jinyun Zhang
      Brief
      • The papers "Demodulate-and-Forward Relaying with Higher Order Modulations: Impact of Channel State Uncertainty" by Annavajjala, R., Maaref, A. and Zhang, J., "Enhanced Position Estimation via Node Cooperation" by Sahinoglu, Z. and Gezici, S., "A Complete Characterization of an Optimal Timer Based Selection Scheme" by Shah, V., Mehta, N.B. and Yim, M.H.R., "Clustering Based Fractional Frequency Reuse and Fair Resource Allocation in Multi-cell Networks" by Fu, W., Tao, Z., Zhang, J. and Agrawal, D.P., "Subcarrier Spreading for ICI Mitigation in OFDM/OFDMA Systems" by Gao, W., Duan, C. and Zhang, J., "Prioritized Broadcast Contention Control in VANET" by Ye, F., Yim, M.H.R., Guo, J., Zhang, J. and Roy, S., "Adaptive Probabilistic Decision-based Energy Saving Strategy for the Next Generation Cellular Wireless Systems" by Fu, W., Tao, Z., Zhang, J. and Agrawal, D.P. and "Congestion Control to Achieve Optimal Broadcast Efficiency in VANETs" by Ye, F., Yim, M.H.R., Zhang, J. and Roy, S. were presented at the IEEE International Conference on Communications (ICC).
    •