TY - CHAP

T1 - On the achievable sum-rate of mimo bidirectional underlay cognitive cooperative networks

AU - Alsharoa, Ahmad

AU - Ghazzai, Hakim

AU - Alouini, Mohamed-Slim

N1 - KAUST Repository Item: Exported on 2020-10-01

PY - 2016/11/22

Y1 - 2016/11/22

N2 - In this chapter, we consider a multi-input multi-output (MIMO) cooperative cognitive radio (CR)
system model under a spectrum sharing set-up, where primary users and secondary users operate
on the same frequency band. In the CR underlay mode, secondary users are allowed to exploit the
spectrum allocated by primary users in an opportunistic manner by respecting a tolerated temperature limit. The secondary networks employ an amplify-and-forward two-way relaying technique in
order to maximize the sum-rate under power budget and interference constraints. Indeed, combined
CR, tow-way relaying, and MIMO antennas provide a smart solution for a more efficient usage
of the frequency band. Furthermore, we investigate two models of power distributions; discrete
power distribution and continuous power distribution. In this context, we formulate an optimization problem that is solved using joint optimization algorithms. For discrete power distribution, we
employ heuristic algorithms as iterative and genetic algorithms to find a solution. While for continuous power distribution, first, we derive a closed-form expression of the optimal power allocated to
antenna terminals. Then, we employ a heuristic algorithm based on practical swarm optimization
algorithm to find the power allocated to secondary relays. In our numerical results, we demonstrate
the performance of the proposed schemes for both power distribution types and analyze the impact of several system parameters on the achieved performance. Finally, we compare our proposed
scheme with traditional one-way relaying scheme.

AB - In this chapter, we consider a multi-input multi-output (MIMO) cooperative cognitive radio (CR)
system model under a spectrum sharing set-up, where primary users and secondary users operate
on the same frequency band. In the CR underlay mode, secondary users are allowed to exploit the
spectrum allocated by primary users in an opportunistic manner by respecting a tolerated temperature limit. The secondary networks employ an amplify-and-forward two-way relaying technique in
order to maximize the sum-rate under power budget and interference constraints. Indeed, combined
CR, tow-way relaying, and MIMO antennas provide a smart solution for a more efficient usage
of the frequency band. Furthermore, we investigate two models of power distributions; discrete
power distribution and continuous power distribution. In this context, we formulate an optimization problem that is solved using joint optimization algorithms. For discrete power distribution, we
employ heuristic algorithms as iterative and genetic algorithms to find a solution. While for continuous power distribution, first, we derive a closed-form expression of the optimal power allocated to
antenna terminals. Then, we employ a heuristic algorithm based on practical swarm optimization
algorithm to find the power allocated to secondary relays. In our numerical results, we demonstrate
the performance of the proposed schemes for both power distribution types and analyze the impact of several system parameters on the achieved performance. Finally, we compare our proposed
scheme with traditional one-way relaying scheme.

UR - http://hdl.handle.net/10754/665285

UR - http://www.crcnetbase.com/doi/10.1201/9781315370422-21

UR - http://www.scopus.com/inward/record.url?scp=85052170266&partnerID=8YFLogxK

U2 - 10.1201/9781315370422-21

DO - 10.1201/9781315370422-21

M3 - Chapter

SN - 9781498726368

SP - 479

EP - 500

BT - Spectrum Sharing in Wireless Networks

PB - CRC Press

ER -