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Concept

Cognitive radio

Related publications (27)

Joint Power Allocation and Path Selection for Multi-Hop Noncoherent Decode and Forward UWB Communications

Marco Mondelli, Xiaoli Ma

With the aim of extending the coverage and improving the performance of impulse radio ultra-wideband (UWB) systems, this paper focuses on developing a novel single differential encoded decode and forward (DF) non-cooperative relaying scheme (NCR). To favor ...

Ieee-Inst Electrical Electronics Engineers Inc2014

Method to optimize the communication parameters between an access point and at least one client device

Patrick Thiran, Julien Pierre Sacha Herzen, Ruben Merz

A method to optimize the communication on a channel between an access point and at least one client device, said channel being characterized by a center frequency and a bandwidth, comprises: establishing a connection on a first channel according to a first ...

2014

Efficient MIMO transmission of PSK signals with a single-radio reconfigurable antenna

Julien Perruisseau-Carrier, Mohsen Yousefbeiki

Crucial developments to the recently introduced signal-space approach for multiplexing multiple data symbols using a single-radio switched antenna are presented. First, we introduce a general framework for expressing the spatial multiplexing relation of th ...

Institute of Electrical and Electronics Engineers2014

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

Julien Perruisseau-Carrier, Mohsen Yousefbeiki

Recently, a technique called beam-space MIMO has been demonstrated as an effective approach for transmitting multiple signals while using a single RF-chain. In this work, we present novel design considerations and a compact antenna solution to stimulate th ...

Institute of Electrical and Electronics Engineers2014

Human Body Proximity Effects on Ultra-Wideband Antennas

Mohsen Koohestani

Body-centric applications include wearable communication systems that can be integrated in many different applications, as for instance in military, security forces, sport, fashion, or medical. In the latter, the quality of life of patients can be greatly ...

EPFL2014

Energy Efficient VLSI Circuits for MIMO-WLAN

Carl Christian Sten Dominic Senning

Mobile communication - anytime, anywhere access to data and communication services - has been continuously increasing since the operation of the first wireless communication link by Guglielmo Marconi. The demand for higher data rates, despite the limited b ...

EPFL2014

Unit Cell for Frequency-Tunable Beamscanning Reflectarrays

Julien Perruisseau-Carrier, Daniel Rodrigo Lopez

A reflectarray cell able to dynamically control the reflection phase at a variable frequency is presented. This capability enables beam-scanning reflectarrays with frequency reconfigurability, which is a novel capability with applications in frequency-hopp ...

Institute of Electrical and Electronics Engineers2013