Technical Program

Paper Detail

Paper:	SPCOM-L3.5
Session:	Co-operative Communications
Time:	Wednesday, May 17, 11:20 - 11:40
Presentation:	Lecture
Topic:	Signal Processing for Communication: MIMO multi-user and multi-access schemes
Title:	Receiver-Enhanced Cooperative Spatial Multiplexing with Hybrid Channel Knowledge
Authors:	Hilde Skjevling, University of Oslo, Norway; David Gesbert, Institut Eurecom, France; Are Hjørungnes, University Graduate Center, Norway
Abstract:	This paper explores the idea of cooperative spatial multiplexing for use in MIMO multicell networks. We imagine applying this cooperation for several multiple antenna access-points to jointly transmit streams towards multiple single-antenna user terminals in neighbouring cells. We make the setting more realistic by introducing a constraint on the {\em hybrid channel state information} (HCSI), assuming that each transmitter has full CSI for its own channel, but only {\em statistical} information about other transmitters' channels. Each cooperating transmitter then makes guesses about the behaviour of the other transmitters, using the statistical CSI. We show two of several possible transmission strategies under this setting, and include simple optimization at the receiver to improve performance. Comparisons are made with fully cooperative (full CSI) and non-cooperative schemes. Simulation results show a substantial cooperation gain despite the lack of instantaneous information.