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Network MIMO with a Backhaul Constraint

Network MIMO is an approach whereby a user terminal may be served by more than one base station, providing a virtual MIMO array and overcoming cell edge effects. When large numbers of base stations collaborate this may result in excessive complexity. This project will investigate the combination of OFDMA, widely used for multiple access, with network MIMO to optimally serve a user terminal at minimal complexity.

To cope with the backhaul capacity constraint, this project will also investigate the reduction of backhaul infrastructure between base stations (BS). Distributed compression is one feasible way to reduce the load on the backhaul system. A well-known scheme is distributed Wyner-Ziv (D-WZ) compression, which transmits the compressed signal to BS by using the received signal as side information to estimate the users’ message. The project will further exploit the improvement with this scheme, for example, by choosing different LDPC algorithms.

Members

• Rui Lei
• Alister Burr

Dates

• Start: February 2013

Research