IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
PAC vs. MAC for decentralized detection using noncoherent modulation
IEEE Transactions on Signal Processing
The effect of noise correlation in amplify-and-forward relay networks
IEEE Transactions on Information Theory
Distributed interleave-division multiplexing space-time codes for coded relay networks
ISWCS'09 Proceedings of the 6th international conference on Symposium on Wireless Communication Systems
Memoryless relay strategies for two-way relay channels
IEEE Transactions on Communications
IEEE Transactions on Wireless Communications
Optimal distributed beamforming for two-way relay networks
IEEE Transactions on Signal Processing
Optimal relay function in the low-power regime for distributed estimation over a MAC
IEEE Transactions on Signal Processing
IEEE Transactions on Information Theory
Optimal linear non-regenerative multi-hop MIMO relays with MMSE-DFE receiver at the destination
IEEE Transactions on Wireless Communications
Design and performance of optimized relay mappings
IEEE Transactions on Communications
Bayesian symbol detection in wireless relay networks via likelihood-free inference
IEEE Transactions on Signal Processing
IEEE Communications Letters
Duality of MIMO multiple access channel and broadcast channel with amplify-and-forward relays
IEEE Transactions on Communications
Bounds on rates of LDPC codes for BEC with varying erasure rate
IEEE Transactions on Communications
Mitigating error propagation in two-way relay channels with network coding
IEEE Transactions on Wireless Communications
Spectral efficient cooperative diversity technique with multi-layered modulation
IEEE Transactions on Communications
Downlink Performance Analysis of MIMO Relaying Networks
Wireless Personal Communications: An International Journal
On optimal policies for control and estimation over a Gaussian relay channel
Automatica (Journal of IFAC)
Wireless Personal Communications: An International Journal
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We explore the SNR-optimal relay functionality in a mernoryless relay network, i.e. a network where, during each channel use, the signal transmitted by a relay depends only on the last received symbol at that relay. We develop a generalized notion of SNR for the class of memoryless relay functions. The solution to the generalized SNR optimization problem leads to the novel concept of minimum mean squared uncorrelated error (MMSUE) estimation. For the elemental case of a single relay, we show that MMSUE estimate is a scaled version of the MMSE estimate. This scheme, that we call estimate and forward (EF), performs better than the best of amplify and forward (AF) and demodulate and forward (DF) in both parallel and serial relay networks. We determine that AF is near-optimal at low transmit power in a parallel network, while DF is near-optimal at high transmit power in a serial network. For hybrid networks that contain both serial and parallel elements, the advantage of EF over the best of AF and DF is found to be significant. Error probabilities are provided to substantiate the performance gain obtained through SNR optimality. We also show that, for Gaussian inputs, AF, DF and EF are identical