Capacity of information channels with relays


ABSTRACT: MIMO techniques have been widely proposed as a means to improve capacity of wireless channels, thus becoming the most promising technology for next generation networks. However, their practical deployment in current wireless devices is severely affected by antenna correlation, which reduces their impact on performance. One approach to overcome this limitation is relaying diversity. In relay channels, a set of N wireless nodes aids the source-destination communication by relaying the source data, thus creating a distributed antenna array with uncorrelated path gains.

In this talk, we will first define and classify relaying techniques, as well as analyze intended benefits and target scenarios for application. On the second part of the talk, we will present capacity results for three well known information channels assisted by multiple parallel relays: the point-to-point channel, the multiple-access channel and the broadcast channel. For those three, we will compare relaying techniques and derive asymptotic performance.

SPEAKER: Aitor del Coso (Madrid, 1980) received M.Sc. degree in electrical engineering from Universidad Politécnica de Madrid (UPM) in 2003, and he is currently with the Centre Tecnològic de Telecomunicacions de Catalunya (CTTC), pursuing his Ph.D. on Signal Theory and Communications at the Universitat Politècnica de Catalunya (UPC), Barcelona.