# Turbo-like Iterative Multi-user Receiver Design for 5G Non-orthogonal Multiple Access

## TL;DR

This paper reviews NoMA transceiver development for 5G, emphasizing turbo-like iterative multi-user receivers, and highlights EPA with hybrid PIC as an efficient solution with fast convergence and low complexity.

## Contribution

It provides an overview of NoMA transceiver progress in 3GPP and identifies EPA with hybrid PIC as a promising low-complexity, fast-converging MU receiver.

## Key findings

- EPA with hybrid PIC achieves fast convergence.
- EPA with hybrid PIC has similar performance to MPA.
- EPA with hybrid PIC offers lower complexity.

## Abstract

Non-orthogonal multiple access (NoMA) as an efficient way of radio resource sharing has been identified as a promising technology in 5G to help improving system capacity, user connectivity, and service latency in 5G communications. This paper provides a brief overview of the progress of NoMA transceiver study in 3GPP, with special focus on the design of turbo-like iterative multi-user (MU) receivers. There are various types of MU receivers depending on the combinations of MU detectors and interference cancellation (IC) schemes. Link-level simulations show that expectation propagation algorithm (EPA) with hybrid parallel interference cancellation (PIC) is a promising MU receiver, which can achieve fast convergence and similar performance as message passing algorithm (MPA) with much lower complexity.

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Source: https://tomesphere.com/paper/1812.04812