Research Axes

– Wireless Simultaneous Energy and Information Transmission

For decades, a traditional engineering perspective was to use radio frequency (RF) signals exclusively for information transmission. However, this approach has been shown to be suboptimal since an RF signal carries both energy and information. Beyond the existing applications, simultaneous transmission of both information and energy appears as a promising technology for a variety of emerging applications including low-power short-range communication systems, sensor networks, machine-to-machine networks and body-area networks, among others.

Our main contributions on this topic are listed here.

Communications Systems with Feedback

The traditional role of feedback in wireless communications systems has been to improve their reliability. Recently, several transformative roles of feedback have emerged in the context of interference networks: harnessing interference as side information and improving simultaneous information and energy transmission. From these new points of view, feedback induces some sort of cooperation that enhances the individual performance of radio links even in fully decentralized and competitive scenarios.

Our main contributions on this topic are listed here.

– Secrecy at the Physical Layer

In communications, security commonly relies on cryptographic algorithms implemented at upper layers of the protocol stack. Recently, a compelling complementary approach has risen from the area of information theory and has become a focal point of research. The breakthrough concept of physical layer security is to exploit the characteristics inherent to the communication channel to ensure secrecy in wireless transmissions. 

Our main contributions on this topic are listed here.

– Decentralized Communications Networks (DCNs)

A decentralized self-configuring network (DSCN) is basically an infrastructureless network in which transmitters communicate with their respective receivers without the control of a central authority, for instance, a base station. Therefore, radio devices must autonomously tune their transmit-receive configuration for optimizing their own individual performance and efficiently exploiting the available radio resources. A transmit-receive configuration is often described in terms of the number of information bits per block, the block length, the codebook, the encoding-decoding functions, the power allocation policy, etc. 

Our main contributions on this topic are listed here.

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