Spatio-Temporal Signal Processing

This works aims to enhance the know-how of the team in receiver design for multi-antenna transceivers operating at very high spectral-efficiency.  Specifically we are addressing receiver strategies for 2-4 antenna terminals which operate either for point-to-point MIMO channels, multiuser-MIMO channels and interference channels.  We aim to find computationally efficient algorithms for fixed-point processing under real-time processing constraints. We also consider distributed techniques in support of Advanced relaying or distributed MIMO.  This is work carried out in collaboration with Orange and Thales Communications in the context of the SHARING Celtic+ project.  Here we use OAI to innovate in the area of multi-relaying and device-to-device communications (D2D).  We first investigate the use of multiple-relays for eMBMS single-frequency transmission to serve difficult to reach areas in a collaborative fashion.  Secondly, the D2D scenario augments the OAI protocol stack to allow terminals to act as relays to offload content to other terminals using the uplink frequency.  This is a somewhat more futuristic scenario than what is proposed in Rel-12/13 3GPP systems.  OAI is also being used to build a LTE-based massive MIMO demonstrator, both using EURECOM experimental radios (ExpressMIMO2) as well as with partners facilities based on National Instruments hardware.  Our main focus is on efficient ways to exploit channel reciprocity in massive antenna systems (32-64 antenna elements). Finally, the lab will also develop a Full-Duplex Communication system in the frame of the ANR-2015 project DUPLEX, a project where EURECOM is the project leader. DUPLEX project first objective is to study the theoretical limits (throughput) of full-duplex communication equipment, and in particular in the case of a Multiple Inputs Multiple Outputs (MIMO) equipment. The second objective of the project is to develop a MIMO full-duplex communication equipment (prototype) for the next generation of communications, including antenna techniques, analog and digital processing for the cancellation of the transmitted signal at the receiver .