Abstract:
We optimize the weighted sum energy efficiency (WSEE) of two-way amplify and forward relaying, where multiple full-duplex (FD) user-pairs exchange information via a share...Show MoreMetadata
Abstract:
We optimize the weighted sum energy efficiency (WSEE) of two-way amplify and forward relaying, where multiple full-duplex (FD) user-pairs exchange information via a shared FD massive multiple-input multiple-output (MIMO) relay. Optimization of user-centric WSEE metric, which prioritizes links of users with high energy efficiency (EE) requirements by suitably choosing their weights, is a non-convex problem due to its sum-of-ratio form. We optimize it by first approximating WSEE as a concave-convex fractional function, and then by using the quadratic transform. We then use Karush-Kuhn-Tucker (KKT) conditions to derive a closed-form solution to optimize WSEE. We numerically show that the i) proposed solutions achieve significant WSEE gains; and ii) suitable choice of weights can help prioritize EE requirements of different users.
Published in: IEEE Transactions on Wireless Communications ( Volume: 19, Issue: 2, February 2020)
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- IEEE Keywords
- Index Terms
- Energy Efficiency ,
- Massive Multiple-input Multiple-output ,
- Quadratic Transformation ,
- Full-duplex Relay ,
- Non-convex Problem ,
- Total Power ,
- Transmission Power ,
- Additive Gaussian Noise ,
- Convex Function ,
- Antenna Array ,
- Bottom Of Page ,
- Linear Constraints ,
- Central Limit Theorem ,
- Channel Estimation ,
- Concave Function ,
- KKT Conditions ,
- Relay System ,
- Co-channel Interference ,
- Channel Estimation Error ,
- Massive Multiple-input Multiple-output Systems ,
- Self-interference Cancellation ,
- Large-scale Matrix ,
- Constraint Qualification ,
- Fractional Programming ,
- Inter-user Interference ,
- Lagrange Multiplier ,
- Optimization Variables ,
- Achievable Rate ,
- Power Constraint ,
- Path Loss
- Author Keywords
Keywords assist with retrieval of results and provide a means to discovering other relevant content. Learn more.
- IEEE Keywords
- Index Terms
- Energy Efficiency ,
- Massive Multiple-input Multiple-output ,
- Quadratic Transformation ,
- Full-duplex Relay ,
- Non-convex Problem ,
- Total Power ,
- Transmission Power ,
- Additive Gaussian Noise ,
- Convex Function ,
- Antenna Array ,
- Bottom Of Page ,
- Linear Constraints ,
- Central Limit Theorem ,
- Channel Estimation ,
- Concave Function ,
- KKT Conditions ,
- Relay System ,
- Co-channel Interference ,
- Channel Estimation Error ,
- Massive Multiple-input Multiple-output Systems ,
- Self-interference Cancellation ,
- Large-scale Matrix ,
- Constraint Qualification ,
- Fractional Programming ,
- Inter-user Interference ,
- Lagrange Multiplier ,
- Optimization Variables ,
- Achievable Rate ,
- Power Constraint ,
- Path Loss
- Author Keywords