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A Multi-antenna Iterative Frequency-domain Detection for Power-efficient NOMA Schemes

Silva, M. ; Guerreiro, J. ; Ribeiro, F. ; Dinis, R. ; Carvalho, P. ; Jayakody, D.

A Multi-antenna Iterative Frequency-domain Detection for Power-efficient NOMA Schemes, Proc Progress in Electromagnetics Research Symp. - PIERS, Rome, Italy, Vol. , pp. - , June, 2019.

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Abstract
The transmitted signals in non-orthogonal multiple access (NOMA) schemes can
have substantial envelope °uctuations, not to mention the inherent high interference levels. This
means that a high price in terms of power e±ciency can be payed to achieve the substantial ca-
pacity gains of NOMA systems. In this paper we consider the use single-carrier signals combined
with NOMA schemes in the downlink transmission. We present a multi-antenna transmission
technique that is compatible with the use of high-e±ciency power ampli¯ers and does not re-
quire any pre-processing and allows the use of power-e±cient ampli¯ers. Moreover, an e±cient
detection is achieved using iterative receivers with joint multi-user detection and equalization.
Our performance results show that the proposed technique allows high power e±ciency, with
bit-error-rate (BER) performance close to the matched ¯lter bound (MFB)