Fouad Gholam

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Analog antenna combining architectures have recently received increased interest due to their reduced size and power consumption, in comparison with the conventional multiple-input–multiple-output (MIMO) approach that operates in the baseband. In this paper, we design algorithms for three new radio-frequency (RF) architectures that are based on different(More)
An architecture for implementing the maximum ratio combining (MRC) in the radio-frequency (RF) domain has recently been proposed based on applying vector modulators at each branch. In this paper we study a simplified architecture, which eliminates the need for IQ mixing and reduces the number of adders. Interestingly, the optimal beamforming solution,(More)
In this paper we study the multiple-input multiple-output two-way relay channel (MIMO-TWRC) when the nodes use analog beamforming. Following the amplify-and-forward (AF) strategy, the problem consists of finding the transmit and receive beamformers of the nodes and the relay, and the power allocated to each one, that achieve the boundary of the capacity(More)
This paper considers a novel multiple-input multiple-output (MIMO) architecture, which combines the signals in the radio-frequency (RF) domain. Unlike previous approaches, the proposed architecture is exclusively based on the application of different gain factors to the transmitted/received signals, and therefore it avoids the need of including a(More)
Equal gain beamforming (EGB) schemes are typically applied in the baseband domain and hence require complex RF transceivers. In order to simplify the circuitry and energy consumption of the MIMO transceiver, in this paper we consider an EGB scheme that operates in the RF domain by means of analog phase shifters. Under OFDM transmissions, the design of the(More)
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