Abstract:
In this paper two different non-orthogonal multiple access (NOMA) relay schemes are analyzed, namely NOMA cooperative scheme and NOMA TDMA scheme. Both schemes apply NOMA...Show MoreMetadata
Abstract:
In this paper two different non-orthogonal multiple access (NOMA) relay schemes are analyzed, namely NOMA cooperative scheme and NOMA TDMA scheme. Both schemes apply NOMA in the first stage by sending NOMA superimposed signals to relays. Relays then forward the messages to two UEs in the second stage. In the second stage of NOMA cooperative scheme, two relays form a cooperative pair to simultaneously transmit the decoded signals to their respective recipients. Dirty paper coding is used as precoding to cancel out inter-user interference. The second stage of NOMA TDMA scheme uses TDMA to send to two users in two separate time slots. The outage probability is analyzed for both schemes and the impact of error propagation in the NOMA successive interference cancellation is analyzed and evaluated. Performance study shows that the theoretical analysis matches the simulation results very well. NOMA cooperative scheme achieves an overall better outage performance than NOMA TDMA scheme.
Date of Conference: 19-22 March 2017
Date Added to IEEE Xplore: 11 May 2017
ISBN Information:
Electronic ISSN: 1558-2612