Optimization of RRU/UE Pairs for Multi-point to Multi-UE Coordinated (MP2MUC) Transmissions

Visiting researcher: Dr Yongzhao Li (XDU)
Host researcher: Dr. Simon Armour & Prof. Joe McGeehan (University of Bristol)
Duration: 3 months
Status: Ongoing

Biography of the visiting researcher

Yongzhao Li received his Ph.D. degree in signal and information processing in 2005, at Xidian University, Xian, China. Since 1996, he joined Xidian University, where he is currently an associate professor at the State Key Laboratory of Integrated Services Networks, Xidian University. His research interests include MIMO, OFDM, Space-Time Coding, co-channel interference, beamforming and cooperative MIMO communications. In these areas, he has published more than 40 papers in international journals and conference proceedings.
In 2008, he received the best paper award of IEEE ChinaCOM 2008 international conference. He has been the principal investigator of several national sponsored funds, such as NSFC, Special grade of China Postdoctoral Science Foundation funded project and Important National Science & Technology Specific Project. As a Research Associate Professor, he had been working with Prof. Leonard J. Cimini, Jr. in the University of Delaware from 2007 to 2008. He is a Member of IEEE.

Background and motivation

Due to the impact of the significant co-channel interference in cellular-like systems, the throughput of the cell-edge UEs is difficult to be raised to a large extent under the conventional centralized base station (BS) framework. Recently, some distributed BS networks related techniques have been proposed as promising solutions for the future cellular mobile communication. By defining an RRU as a point, we construct a uniform framework, which is called Multi-Point to Multi-UE Coordinated (MP2MUC) transmissions, for the future distributed BS networks. The prerequisite for a successful MP2MUC transmission is the construction of an RRU/UE transmission pair, i.e., the selection of cooperative partners at both ends. For a specific RRU/UE pair, the numbers of RRUs and/or UEs may be larger than one. Hence, there exist many optional RRU/UE pairs for the desired UE. The optimization of RRU/UE pairs plays an important role in the performance of cell-edge UEs and the whole system.

Research activities

The research activities in the project include:
  1. Optimization of RRU/UE pairs for the UEs which request to access the network.
  2. Optimization of the RRU/UE pairs for cooperative handoff


  1. Optimization of cooperative RRU/UE pairs based on synchronization and channel energy criterions, Chinese Patent (No. 201110129442.2)
  2. Multiple-point multiple-UE cooperative transmission oriented handover technique, Chinese Patent (No. 201110129441.8)
  3. Impact of Arbitrary Co-channel MIMO Modes on Alamouti Coding Under Path-Loss and Rayleigh Fading, ICC 2011, June 2011
  4. Statistical Analysis of MIMO Beamforming with Co-Channel Unequal-Power MIMO Interferers under Path-Loss and Rayleigh Fading, to appear in IEEE Transactions on Signal Processing.

To be updated

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