Optimal Design of Non-Regenerative MIMO Wireless Relays

By Xiaojun Tang, Yingbo Hua. IEEE Transactions on Wireless Communications, 2007

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Relay Architectures for 3GPP LTE-Advanced (2009, neutral): “Amplify-and-forward relays apply linear transformation to the received signal [13–15] while decodeand-forward relays decode the signal then re-encode for transmission [16].”
Joint MMSE Transceiver Design in Non-Regenerative MIMO Relay Systems (2008, methodology): “Although a similar observation is also presented in [4] for the relay-precoder attaining maximum channel capacity (MCC), our result here is slightly different in that the ith strongest eigenmode Λ1,i of backward channel is always paired with the ith strongest eigenmode Λ2,i of forward channel when M”
A Unified Framework for Optimizing Linear Nonregenerative Multicarrier MIMO Relay Communication Systems (2009, background): “Using a linear receiver, the estimated signal waveform at the destination node is given by where is an weight matrix at the subcarrier.”
Network Beamforming Using Relays With Perfect Channel Information (2008, background): “The more practical multiple-antenna systems with partial channel information at the transmitter, channel statistics or quantized instantaneous channel information, are also analyzed extensively [29–33].”