TR2020-070

A dCDD-Based Transmit Diversity for NOMA Systems

    •  Kim, K.J., Liu, H., Lei, H., Ding, Z., Orlik, P.V., Poor, H.V., "A dCDD-Based Transmit Diversity for NOMA Systems", IEEE International Conference on Communications (ICC), June 2020, pp. 1-7.
      BibTeX TR2020-070 PDF Video
      • @inproceedings{Kim2020jun,
      • author = {Kim, Kyeong Jin and Liu, Hongwu and Lei, Hongjiang and Ding, Zhiguo and Orlik, Philip V. and Poor, H. Vincent},
      • title = {A dCDD-Based Transmit Diversity for NOMA Systems},
      • booktitle = {IEEE International Conference on Communications (ICC)},
      • year = 2020,
      • pages = {1--7},
      • month = jun,
      • publisher = {IEEE},
      • url = {https://www.merl.com/publications/TR2020-070}
      • }
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  • Research Areas:

    Communications, Optimization, Signal Processing

Abstract:

In this paper, a new transmit diversity scheme for cooperative non-orthogonal multiple access (NOMA) is proposed without perfect channel state information at the transmitter (CSIT). To support two users under a near-far user pairing constraint, a distributed cyclic delay diversity (dCDD) scheme is adjusted into NOMA by dividing a set of remote radio heads (RRHs) into two groups for multiple cyclic-prefixed single carrier transmissions. Using only a limited channel relevant information needed to make dCDD work, a new RRH assignment and power allocation mechanism is proposed. After then, closed-form expressions for the rates of two users achieved by the proposed RRH assignment and power allocation mechanism are derived. For various scenarios, link-level simulations verify that superior rates can be achieved by NOMA with dCDD over the traditional orthogonal multiple access with dCDD.

 

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