Events Calendar

Integrated Systems Seminar Series

Speaker: Dr. Timothy M. Hancock, MIT Lincoln Laboratory

Talk Title: Hardware Phenomenological Effects on Co-channel Full-Duplex MIMO Relay Performance

Abstract: This presentation will discuss the performance of co-channel full-duplex multiple-input multiple-output (MIMO) nodes is considered in the context of models for realistic hardware characteristics. Here, co-channel full-duplex relay indicates a node that transmits and receives simultaneously in the same frequency band. It is assumed that transmit and receive phase centers are physically distinct, enabling adaptive spatial transmit and receive processing to mitigate self-interference. The use of MIMO indicates a self-interference channel with spatially diverse inputs and outputs, although multiple modes are not explored in this analysis. Rather, the focus will be on rank-1 transmit covariance matrices. In practice, the limiting issue for co-channel full-duplex nodes is the ability to mitigate self-interference. While theoretically a system with infinite dynamic range and exact channel estimation can mitigate the self-interference perfectly, in practice, transmitter and receiver dynamic range, nonlinearities, and noise, as well as channel dynamics, limit the practical performance. This presentation will investigate the self-interference mitigation limitations in the context of eigenvalue spread of spatial transmit and receive covariance matrices caused by realistic hardware models.

Biography: Timothy M. Hancock received the B.S. degree in electrical engineering from the Rose-Hulman Institute of Technology and the M.S. and Ph.D. degrees in electrical engineering from the University of Michigan where he was involved with the development of SiGe integrated microwave circuits from 6 to 77 GHz. In the past he has worked for Conexant Systems on a single chip GPS receiver and at M/A-COM on a Silicon Germanium 24 GHz automotive radar solution. For 6 years he was a staff member in the RF & Quantum Systems Technology Group at MIT Lincoln Laboratory, where he was involved with the development of low-power, small form-factor wireless devices, reconfigurable and multiple-input-multiple-output (MIMO) communication systems where his work focused on integrated circuit design and wireless system design. Since 2011 he has been the Assistant Leader of the same group where he continues to develop programs in the area of MIMO communications and small form-factor wireless devices as well as technology development for RADAR and ELINT systems. He is a senior member of the IEEE and the 2010 inaugural recipient of the MIT Lincoln Laboratory Early Career Technical Achievement Award.

Host: Prof. Hossein Hashemi and Prof. Mike Chen

Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248

Audiences: Everyone Is Invited

Contact: Hossein Hashemi