Antonio Pascual-Iserte

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—This paper considers a wireless communication system with multiple transmit and receive antennas, i.e., a multiple input multiple output (MIMO) channel. The objective is to design the transmitter according to an imperfect channel estimate, where the errors are explicitly taken into account to obtain a robust design under the maximin or worst case(More)
— In this paper, we study the design of the transmitter in the downlink of a multiuser and multiantenna wireless communications system, considering the realistic scenario where only an imperfect estimate of the actual channel is available at both communication ends. Precisely, the actual channel is assumed to be inside an uncertainty region around the(More)
— In this letter, we study spatial Tomlinson-Harashi-ma precoding (STHP) from an information theoretic point of view encompassing both the single and the multiuser scenarios. Since the performance of any communications precoding scheme relies on the quality of the channel state information (CSI) that is made available at the transmitter side, in this work(More)
— In this paper we address the problem of the design of a power allocation strategy for an Orthogonal Frequency Division Multiplexing (OFDM) system. We assume no spatial diversity at the transmitter and receiver, that is, a Single-Input-Single-Output (SISO) channel is considered. The goal is to allocate all the available power at the transmitter among the(More)
Adaptive antenna arrays can be used to improve the performance of Orthogonal Frequency Division Multiplexing systems. They are usually applied in the frequency domain, after the FFT de-modulation. In this paper, the selected algorithms are applied in time domain. A blind method is firstly proposed for the maxi-mization of the temporal Signal to Noise plus(More)
Orthogonal Frequency Division Multiplexing (OFDM) has been recently established for several systems such as HIPERLAN/2 and Digital Video and Audio Broadcasting. The success of this modulation is due to the easy implementation of the modulator and demodulator, including the equalization process. Moreover, in last years also increasing interest has been put(More)
This paper addresses the problem of the spatial scheduling of users in a cell for simultaneous downlink transmission from a Base Station (BS) having multiple antennas under a perspective of joint Physical and Medium Access Control (PHY-MAC) design. First of all, we compute the transmit beamvectors for each group according to a Zero Forcing (ZF) criterion,(More)