MIMO-NOMA Design for Small Packet Transmission in the Internet of Things

Zhiguo Ding, Linglong Dai, H. Vincent Poor

Research output: Contribution to journalArticlepeer-review

218 Scopus citations


A feature of the Internet of Things (IoT) is that some users in the system need to be served quickly for small packet transmission. To address this requirement, a new multiple-input multiple-output non-orthogonal multiple access (MIMO-NOMA) scheme is designed in this paper, where one user is served with its quality of service requirement strictly met, and the other user is served opportunistically by using the NOMA concept. The novelty of this new scheme is that it confronts the challenge that the existing MIMO-NOMA schemes rely on the assumption that users' channel conditions are different, a strong assumption which may not be valid in practice. The developed precoding and detection strategies can effectively create a significant difference between the users' effective channel gains, and therefore, the potential of NOMA can be realized even if the users' original channel conditions are similar. Analytical and numerical results are provided to demonstrate the performance of the proposed MIMO-NOMA scheme.

Original languageEnglish (US)
Article number7447670
Pages (from-to)1393-1405
Number of pages13
JournalIEEE Access
StatePublished - 2016

All Science Journal Classification (ASJC) codes

  • General Engineering
  • General Computer Science
  • General Materials Science


  • MIMO precoding
  • Non-orthogonal multiple access (NOMA)
  • QR decomposition
  • and power allocation
  • multiple-input multiple-output (MIMO)


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