Abstract
In this letter, we investigate the energy efficiency (EE) problem in a millimeter wave massive MIMO system with non-orthogonal multiple access (NOMA). Multiple two-user clusters are formulated according to their channel correlation and gain difference. Following this, we propose a hybrid analog/digital precoding scheme for the low radio frequency chains structure at the base station. On this basis, we formulate a power allocation problem aiming to maximize the EE under users' quality of service requirements and per-cluster power constraint. An iterative algorithm is proposed to obtain the optimal power allocation. Simulation results show that the proposed NOMA scheme achieves superior EE performance than conventional OMA scheme.
Original language | English |
---|---|
Pages (from-to) | 782-785 |
Number of pages | 4 |
Journal | IEEE Wireless Communications Letters |
Volume | 6 |
Issue number | 6 |
DOIs | |
Publication status | Published - Dec 2017 |
Externally published | Yes |
Keywords
- Energy efficiency
- Hybrid precoding
- Massive MIMO
- Millimeter wave
- NOMA
ASJC Scopus subject areas
- Control and Systems Engineering
- Electrical and Electronic Engineering