After the each keynote speech there will be a Q&A. We invite you to join and engage in the discussions!
We kindly remind the presenters that presentations should take 15-18 minutes. 
 

In this talk we present enabling technologies for full-duplex (FD) MIMO. For self-interference cancellation, we have introduced adaptive echo cancellation concept which is based on adaptive filter theory.First, open loop technique is compared to closed loop technique. Closed loop technique such as adaptive echo cancellation continuously updates the system parameters even without requiring special training signal and synchronizations such as OFDM boundary, resulting fast and continuous tracking even during random data transmission. In addition, even in the presence of stronger desired received signal than self-interference, it provides stable tracking and continuous self-interference cancellation. Secondly, in MIMO, the SIC complexity increases exponentially. We propose simpler architecture for RF cancellation which requires only one extra downcoverter regardless of the number of taps without performance loss. For digital cancellation, bilinear architecture is proposed. RF components can be modeled by a linear combination of kernels. In non-bilinear, an adaptive filter is applied at each kernel. Hence, parallel adaptive filters are required. However, in bilinear architecture, two adaptations are cascaded: one for non-linear RF component modeling and the other for echo channel. Although this architecture significantly reduces the complexity, it has stability issues and creates too large dynamics of intermediate variables which prevent from efficient HW implementation. We have solved these short comings and will show demo videos of 2x2 MIMO FD system exhibiting that residual self-interference is below noise.

 

 

Feasibility of Self-backhauling in Full-duplex Radio Access Systems under QoS Constraints

Dani Korpi (Tampere University of Technology, Finland); Taneli Riihonen (Aalto University School of Electrical Engineering, Finland); Mikko Valkama (Tampere University of Technology, Finland)

 

Adaptive Mode Selection in Cognitive Buffer-Aided Full-Duplex Relay Networks with Imperfect Self-Interference Cancellation for Power and Delay Limited Cases

Mostafa Darabi (University of Tehran, Iran); Nima Namvar (North Carolina A&T State University, USA); Behrouz Maham (Nazarbayev University, Kazakhstan); Walid Saad (Virginia Tech, USA); Mérouane Debbah (Huawei, France)

A Cognitive Radio System with Adaptive Decoding and Full-Duplex Relaying at the Secondary Receiver

Marwa Chami, Mylene Pischella and Didier Le Ruyet (CNAM, France)

Improper Signaling in Two-Path Relay Channels

Mohamed Gaafar (Technische Universität Berlin, Germany); Osama Amin (King Abdullah University of Science and Technology (KAUST), Saudi Arabia); Rafael F. Schaefer (Technische Universität Berlin, Germany); Mohamed-Slim Alouini (King Abdullah University of Science and Technology (KAUST), Saudi Arabia)

Full-Duplex Communications to Improve Platooning Control in Multi-Channel VANETs

Claudia Campolo and Antonella Molinaro (University Mediterranea of Reggio Calabria, Italy); Antoine O. Berthet (CentraleSupélec, France)

Suboptimal Radio Resource Management for Full-Duplex enabled Small Cells

Hassan Malik, Mir Ghoraishi and Rahim Tafazolli (University of Surrey, United Kingdom)

 

Mobile data traffic in 2014 was nearly 30 times the size of the entire global Internet in 2000. Next generation wireless networks are targeting 1000x increase in capacity to meet the insatiable demand for more data. Such a tremendous increase in wireless data will require a complete rethinking of today's wireless communication systems and networks from the physical layer to the network and application layer. Several new wireless communication paradigms, including full-duplex wireless, massive MIMO and millimeter-wave wireless, are being considered as candidates for "5G". However, full duplex wireless places requirements on the radio front-end circuitry that are orders of magnitude more challenging than what we have seen in the past on metrics such as interference tolerance and mitigation, dynamic range and power consumption. Such requirements force us to rethink how we have traditionally architected radios, blurring/breaking the functional boundaries that have traditionally existed between the electromagnetic (EM), radio-frequency (RF), analog and digital domains, and bringing sophisticated signal processing functionality traditionally implemented in digital into the RF and EM domains.
 

In this talk, I will focus on recent research in CoSMIC lab in this space. The fundamental challenge in full duplex is the tremendous transmitter self-interference at the receiver, which can be one trillion times more powerful than the desired signal and must be dealt with in all domains. This powerful self-interference is susceptible to uncertainties of the wireless channel (for instance, frequency selectivity and time variance) and the imperfections of the transceiver electronics (nonlinear distortion and phase noise to name a few), making it even harder to deal with. I will describe RF self-interference cancellation concepts that use frequency-domain equalization to obtain wideband cancellation across highly-selective antenna interfaces. In the electromagnetic domain, I will talk about our recent work on breaking Lorentz Reciprocity using time-variance to realize the first integrated magnetic-free non-reciprocal circulator. I will also discuss how polarization can be utilized to achieve robust self-interference suppression by embedding complex signal processing functionalities like wireless channel equalization in the antenna domain. Finally, I will discuss how joint self-interference suppression across the antenna, RF/analog and digital domains can enable achievement of the 90-100dB self-interference suppression levels that are required for practical full-duplex wireless links.

 

Compensation of ADC-induced Distortion in Broadband Full-Duplex Transceivers

Christian Schmidt (Instituto de Investigaciones en Ingeniería Eléctrica - CONICET - Universidad Nacional del Sur, Argentina); Gustavo J. González (CONICET & Universidad Nacional del Sur, Argentina); Fernando Gregorio and Juan E. Cousseau (Universidad Nacional del Sur, Argentina); Taneli Riihonen and Risto Wichman (Aalto University School of Electrical Engineering, Finland)

Measurement of Self-Interference Channels for Full-Duplex Relay in an Urban Scenario

Kun Wang and Ruonan Zhang (Northwestern Polytechnical University, P.R. China); Zhimeng Zhong (Huawei Technologies Co., Ltd., P.R. China); Xiaomei Zhang (Huawei, P.R. China); Xiaoyan Pang (Northwestern Polytechnical University, P.R. China)

 

On the Secrecy Degrees of Freedom with Full-Duplex Communication

Nurul H. Mahmood and Preben Mogensen (Aalborg University, Denmark)

Joint Power and Beam Optimization in a Multi-Carrier MIMO Wiretap Channel with Full-Duplex Jammer

Omid Taghizadeh (RWTH Aachen University, Germany); Tianyu Yang (Institute for Theoretical Information Technology, RWTH Aachen, Germany); Rudolf Mathar (RWTH Aachen University, Germany)

Full-Duplex versus Half-Duplex Large Scale Antenna System

Security Enhancement of Wireless Networks with Wireless-Powered Full-Duplex Relay and Friendly Jammer Nodes

Zahra Mobini (University of Shahrekord, Iran); Mohammadali Mohammadi (Shahrekord University, Iran); Chintha Tellambura (University of Alberta, Canada)