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Towards compact and frequency-tunable antenna solutions for MIMO transmission with a single RF chain

Publications associées (52)

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Adversarial interference models for multiantenna cooperative systems

Michael Christoph Gastpar

According to the cognitive radio paradigm, a terminal or subsystem will opportunistically select a frequency band for data transmission. Because the spectrum is shared, a cognitive system may face interference that cannot be given a statistical description ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2008

Effect of intelligent antennas on radio system planning and on mitigation

Juliane Iten Chaves Simoes

Smart antennas have been recently applied to improve the capacity and the performance of second generation wireless mobile communication systems. In general, smart antennas reduce the effects of multipath fading and improve the signal-to-noise-plus-interfe ...

EPFL2008

Diversity embedding for broadband communication

Sanket Dusad

Given uncertainty in environment, a conservative approach is to design for the worst case, leading to a game-theoretic situation where the environment is controlled by an adversary. However, in many cases, the uncertainty arises from randomness, not an adv ...

EPFL2008

Hardware-efficient steering matrix computation architecture for MIMO communication systems

Carl Christian Sten Dominic Senning, Christoph Studer

Beamforming (BF) improves the error rate performance of multiple-input multiple-output (MIMO) wireless communication systems by spatial separation of the transmitted data streams. Spatial separation is achieved by multiplication of the transmit vector by a ...

2008

Maximum kurtosis beamforming with the generalized sidelobe canceller

Philip Neil Garner, John David Scott Dines, Weifeng Li

This paper presents an adaptive beamforming application based on the capture of far-field speech data from a real single speaker in a real meeting room. After the position of a speaker is estimated by a speaker tracking system, we construct a subband-domai ...

2008

Adaptive Beamforming with a Maximum Negentropy Criterion

Philip Neil Garner, John David Scott Dines, Weifeng Li

IDIAP2008

Active Antenna Selection in Multiuser MIMO Communications

Ali H. Sayed

The paper develops a dynamic antenna scheduling strategy for downlink MIMO communications, where a subset of the receive antennas at certain users is selectively disabled. The proposed method improves the signal-to-leakage-plus-noise (SLNR) ratio performan ...

IEEE2007

On capacity under receive and spatial spectrum-sharing constraints

Michael Christoph Gastpar

Capacity is often studied under constraints on the channel input signals. This paper investigates the behavior of capacity when constraints are placed on the! channel output signal (as well as generalizations thereof). While such a change in perspective le ...

2007

On Capacity Under Receive and Spatial Spectrum-Sharing Constraints

Michael Christoph Gastpar

Capacity is often studied under constraints on the channel input signals. This paper investigates the behavior of capacity when constraints are placed on the channel output signal (as well as generalizations thereof). While such a change in perspective lea ...

Institute of Electrical and Electronics Engineers2007

A Leakage-Based Precoding Scheme for Downlink Multi-User MIMO Channels

Ali H. Sayed

In multiuser MIMO downlink communications, it is necessary to design precoding schemes that are able to suppress co-channel interference. This paper proposes designing precoders by maximizing the so-called signal-to-leakage-and-noise ratio (SLNR) for all u ...

Institute of Electrical and Electronics Engineers2007