In cellular communication systems with frequency reuse factor of one, user terminals (UT) at the cell-edge are prone to intercell interference. Joint processing is one of the coordinated multipoint transmission techniques proposed to mitigate this interference. In the case of centralized joint processing, the channel state information fed back by the users need to be available at the central co...

A new linear block precoding technique is combined with error-correction coding for wireless orthogonal frequencydivision multiplexing (OFDM) transmissions through frequency-selective fading channels. Our precoder is based on the maximization of the mean cutoff rate and requires only the knowledge of the average relative channel multipath gains and delays at the transmitter. Convolutional codin...

Massive MIMO is the future of wireless communication systems as it promises 1000 times increase in data rates per cell. With large number of base station (BS) antennas, simple linear precoding schemes like zero forcing precoding would become computationally expensive due to the inversion of large channel matrices. User selection is an approach which extracts the effective part of the channel ma...

In this paper we introduce a novel linear precoding technique. It was previously reported in the literature that when the user terminals are equipped with one antenna, minimum mean-squared-error (MMSE) in combination with successive interference cancellation is optimum on the uplink, while MMSE precoding in combination with Tomlinson-Harashima precoding (THP) is optimum on the downlink. The lin...

Given a multiple-input multiple-output (MIMO) channel, feedback from the receiver can be used to specify a transmit precoding matrix, which selectively activates the strongest channel modes. Here we analyze the performance of Random Vector Quantization (RVQ), in which the precoding matrix is selected from a random codebook containing independent, isotropically distributed entries. We assume tha...

In this paper, we propose a new precoding method for intersymbol interference (ISI) cancellation by using nonmaximally decimated multirate filterbanks. Unlike the existing precoding methods, such as the TH and trellis precodings, the new precoding i) may be independent of the ISI channel; ii) is linear and does not have to implement any modulo operation; iii) gives the ideal FIR equalization at...

Nonlinear precoding improves the downlink bit error rate (BER) performance of multi-user multiple-input multiple-output (MUMIMO). Broadband single-carrier (SC) block transmission can improve the capability that nonlinear precoding reduces BER, as it provides frequency diversity gain. This paper considers Tomlinson-Harashima precoding (THP) as a nonlinear precoding scheme for SC-MU-MIMO downlink...

Transmit antenna diversity has been exploited recently to develop high performance space-time coders and simple maximum-likelihood decoders for transmissions over known at fading channels. Relying on block precoding, this paper develops generalized space-time coded multicarrier transceivers appropriate for wireless propagation over frequency-selective (and perhaps unknown) multipath channels. M...

Upand downlink transmission over MIMO channels where the transmission paths exhibit intersymbol interference are studied. Equalisation schemes for multipoint-topoint scenarios (multiple access problem, uplink) and precoding schemes for point-to-multipoint scenarios (broadcast channel, downlink) are investigated. In particular, singlecarrier modulation employing decision-feedback equalisation/pr...

A new viewpoint for adopting the lattice reduction in communication over MIMO broadcast channels is introduced. Lattice basis reduction helps us to reduce the average transmitted energy by modifying the region which includes the constellation points. The new viewpoint helps us to generalize the idea of lattice-reduction-aided precoding for the case of unequal-rate transmission, and obtain analy...