A novel scheme inspired by the compute-and-forward relaying strategy for the multiple access relay channel

Opportunistic Cooperation Strategies for Multiple Access Relay Channels with Compute-and-Forward

“…Semi-theoretical and numerical analyses are provided to show the performance of the proposed strategies in terms of outage probability, diversity gain, and network throughput. It is shown that independent of relay placement, the proposed strategies always have lower outage probability compared to the Soussi [18] and Insausti [15] strategies. It is also revealed that the first strategy nearly achieves diversity gain of order two, which is a significant improvement over the Soussi strategy [18].…”

“…On the other hand, the second strategy exactly achieves the diversity gain of order two, which is the full diversity gain of the MARC. 1 Moreover, the results show that both of the proposed strategies yields twice the throughput of the existing strategies [18] and [15] at high signal-to-noise power ratio (SNR).…”

“…as a relay. The MARC also has found a use case in the LTE Advanced mobile communication standard [15], [16]. It has been shown that network coding significantly improves the spectral efficiency of the MARC.…”

“…The achievable rate improvement in their work, however, relies on the assumption that all channel state information (CSI) are known to all nodes. Insausti et al [15] proposed another strategy for applying compute-and-forward to the MARC. Distinct from [18], the relay is allowed to select its local best linear combination; based on this the destination adjusts its linear combination ensuring a full rank coefficient matrix.…”

Performance of non‐orthogonal multiple access: analysis using compute‐and‐forward cooperative relaying in 5G networks

“…CpF has been widely investigated [24–33], but very little has been done on the impact of CpF in CR‐NOMA. In [25], the authors propose a decentralised CpF scheme for recovering different number of equations in two‐layer multiple relay scenarios with low complexity.…”