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For distributed beamforming with multiple relay nodes (RNs), we consider a minimum mean square error (MMSE) criterion with a dual decomposition method and consensus algorithm to decide relay weights for RNs with local communications between RNs. It is shown that the proposed MMSE-based distributed beamforming has a comparable performance to the maximum signal to noise ratio (MSNR) based distributed...
This contribution considers the joint transmitter-receiver optimization in generalized multicarrier code-division multiplexing (GMCCDM) systems. The joint transmitter-receiver optimization consists of an one-tap post-frequency-domain equalizer (post-FDE) and an one-tap pre-FDE. The one-tap post-FDE is optimized under the criterion of minimum mean-square error (MMSE), while the one-tap pre-FDE is optimized...
In this paper we consider the design of jointly optimal filter-banks for transmission over frequency selective MIMO relay channels. Utilising block processing we present designs that maximise signal to noise ratio under the zero forcing constraint and minimise the mean square error. Both designs targetted in this paper assume limited power resource at the relaying stage of the network and we resort...
We address the problem of designing jointly the linear transmit and receive beamformers in a single-cell multiuser multiple-input multiple-output (MIMO) downlink system. The optimization is based on maximizing the weighted harmonic mean of the combiner output's signal-to-interference-and-noise ratio (SINR). When the linear minimum mean-squared error (MMSE) receivers are employed, we show that the...
This paper addresses the issue of the optimization of the regularization constant in semi-blind channel estimation techniques, in which the training sequence-based criterion is combined linearly with the blind subspace criterion. In such semi-blind estimation techniques, the optimization of the regularizing constant with respect to the channel estimation error is mandatory, otherwise, the expected...
This paper investigates effects of pilot assisted channel estimation on dynamic resource allocation in a multiuser orthogonal frequency division multiplexing (OFDM) system. The channel estimation is done in each OFDM symbol through least-squared error (LSE) or minimum mean-squared error (MMSE) algorithm. The performance of each of these algorithms is evaluated through computer simulations. The maximal...
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