Fundamentals of wireless communication
Fundamentals of wireless communication
Power allocation for F/TDMA multiuser two-way relay networks
IEEE Transactions on Wireless Communications
Channel estimation and training design for two-way relay networks with power allocation
IEEE Transactions on Wireless Communications
Bidirectional regenerative half-duplex relaying using relay selection
IEEE Transactions on Wireless Communications - Part 2
IEEE Transactions on Information Theory
Capacity and power allocation for fading MIMO channels with channel estimation error
IEEE Transactions on Information Theory
Performance Bounds for Bidirectional Coded Cooperation Protocols
IEEE Transactions on Information Theory
Achievable Rate Regions and Performance Comparison of Half Duplex Bi-Directional Relaying Protocols
IEEE Transactions on Information Theory
Impact of Imperfect Channel State Information on Bi-Directional Communications With Relay Selection
IEEE Transactions on Signal Processing
Performance of transmitter preprocessing aided cooperative relaying with fixed infrastructure relays
Computers and Electrical Engineering
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This paper deals with the superposition coding (SPC) scheme in multiple-input multiple-output two-way relay channels subject to imperfect channel estimation. In this scenario, two multiple antenna terminals, which are unable to communicate directly, exchange information with each other via a multiple antenna relay. We determine the impact of the channel estimation error degradation on the achievable rate region for two main SPC techniques: (a) SPC without channel state information (CSI) at the users, (b) SPC with an imperfect CSI at the users where a waterfilling power allocation is employed. We demonstrate that imperfect CSI significantly improves the achievable rate at low signal-to-noise ratios (SNRs) while it becomes less critical at high SNRs. In addition, a SPC power allocation technique that incorporates the average channel statistics and does not require any instantaneous CSI is also investigated. We show how the available power is split between the two bi-directional (superimposed) data flows in order to maximize the system performance and to support fairness as well as to maximize the achievable sum-rate.