- Title
- Virtual user pairing based non-orthogonal multiple access in downlink coordinated multipoint transmissions
- Creator
- Hendraningrat, Denny Kusuma; Shahab, Muhammad Basit; Shin, Soo Young
- Relation
- IET Communications Vol. 14, Issue 12, p. 1910-1917
- Publisher Link
- http://dx.doi.org/10.1049/iet-com.2019.0955
- Publisher
- Institution of Engineering and Technology (IET)
- Resource Type
- journal article
- Date
- 2020
- Description
- In this study, joint transmission coordinated multi-point (JT-CoMP) is integrated with virtual user pairing based non-orthogonal multiple access (VP-NOMA), termed as JT-CoMP VP-NOMA. JT-CoMP is a multi-cell coordination scheme, where base stations of neighbouring cells coordinate with each other to improve the performance of their common cell edge users (CEUs). On the other hand, VP-NOMA is a one-to-many user pairing scheme in non-orthogonal multiple access (NOMA), where one cell centre user (CCU) within a cell can be paired/multiplexed with multiple CEUs for better spectrum utilisation. The proposed scheme combines both VP-NOMA for enhancing ergodic sum capacity (ESC) within a cell and JT-CoMP for mitigating inter-cell interference (ICI) between neighbouring cells. To demonstrate the achieved performance gains, ESC of a three-cell scenario is analysed as a key performance metric, where each cell contains two users; a CCU and a CEU. Closed-form expressions for ESC of the considered system are derived, and validated through simulations. Furthermore, the analytical and simulation results of JT-CoMP VP-NOMA are compared with orthogonal multiple access, NOMA, and VP-NOMA to show the achieved performance gains. It is shown that the proposed JT-CoMP VP-NOMA outperforms the other schemes in the viewpoint of ESC.
- Subject
- transmission; user pairing; orthogonal multiple access; performance
- Identifier
- http://hdl.handle.net/1959.13/1463580
- Identifier
- uon:46782
- Identifier
- ISSN:1751-8628
- Language
- eng
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