Themes

Figure 1: Cellular two-way relay channel model.

Figure 1: Cellular two-way relay channel model.

Communication with Cooperation

Given that the point-to-point communication link is well understood, to reach higher performance, we must consider network communication among multiple entities, taking into account the interference and interaction among these users. Cooperation presents a new paradigm relevant to modern communications in order to push the performance boundary. Cooperation techniques are often based on advanced multiuser coding studied in information theory and are finding more and more applications in wireless communications. In this theme, our group focuses on the design and optimization of new, practical cooperation schemes made adaptable to the changing wireless links.

.

Figure 2: One-way relay channel model applied in an ad-hoc network.

Figure 2: One-way relay channel model applied in an ad-hoc network.

Integration in a Network

Having designed and optimized a cooperative scheme, the next question is how to integrate this scheme into a communication network, such as the cellular system. This integration must be based on careful decision of when to use cooperation and a thorough understanding of the performance impact of such a decision on the whole network. In this theme, we leverage tools such as stochastic geometry which allows us to model and analyze a wireless network, taking into account locations of users as well as fading channels, in order to assess the overall network performance.

.

Figure 3: Application in a larger cellular network.

Figure 3: Application in a larger cellular network.

Application in Practical Systems

We investigate the application of our designs and analysis in various practical wireless systems, both with and without infrastructures. These systems can be heterogeneous, spanning multiple spectral ranges from the microwave to mmWave frequencies and employing MIMO communications. Examples of application systems include

  • Cellular Networks (LTE-A, 5G)
  • Ad hoc Networks
  • Vehicular Networks
  • Emergency Message Dissemination
  • Networks with Specialized Requirements

Research Projects

Past Research