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Sum-Rate Maximization of Multi-User OFDMA Two-way Relay Networks under Sub-Carrier Pairing and Fairness Constraints

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Figure

Fig. 1  Overview of Wireless Relaying Network  Wireless  Cooperative  Communication  combats  the  fading  effects  and  achieves  the  same  spatial  diversity that is offered by  Multiple-Inputs-Multiple-Outputs  (MIMO)  systems
Fig. 2  Multi-user TWR Communication section  In  this  paper,  Time  Division  Duplex  (TDD)  mode  is  selected  to  separate  uplink  and  downlink  transmission, as RS is working in half-duplex mode
Fig. 6  System throughput versus SNR
Fig  7  shows  the  individual  sum-rate  for  TWR  AF protocol with both FOP and SOP under data rate  constraint  (C#03)  to  ensure  Minimum-Sum-Rate  (MSR)  requirement  and  better  performance  is  observed for SOP-F

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