• Starts: 1:00 pm on Monday, August 28, 2017
  • Ends: 3:00 pm on Monday, August 28, 2017
Title: Integer-Forcing Architectures in Communication Systems: Alignment and Cloud Radio Access Networks. Presenter: Islam El Bakoury Date: Monday, August 28 Time: 1 PM - 3 PM Location: PHO 404/428 Advisor/Chair: Bobak Nazer (ECE, SE) Committee: David Castanon (ECE, SE), Yannis Paschalidis(ECE, SE)and Prakash Ishwar(ECE, SE) Abstract: Recent work on multiple input multiple output (MIMO) receivers has yielded the integer-forcing linear receiver as an alternative to conventional linear receivers (e.g., zero-forcing receivers). For the special case where the channel matrix remains xed for the duration of the codeword, it has been shown that integer-forcing can operate very close to the performance of optimal joint maximum likelihood decoding. In our work, we investigate the impact of channel variation on the integer-forcing linear receiver and show it still retains an advantage over conventional linear receivers. Furthermore, we study the K-user MIMO interference channel, where some form of interference alignment is needed to attain the highest possible rates. For the important special case of linear alignment strategies, recent work has demonstrated the advantages of integer-forcing interference alignment. We propose a class of iterative optimization algorithms for IFIA and demonstrate its advantages via simulations. Finally, we propose an end-to-end integer-forcing architecture for the uplink cloud radio access network, where users are observed simultaneously by several base stations, each is connected to a central processor via a limited-capacity backhaul link (e.g., microwave or optical links). In this architecture, each base station sends a quantized channel observation to the CP, rather than attempt local decoding. The CP rst recovers the base stations' observations by using integer-forcing techniques to exploit the correlation within these observations, then decodes the transmitted messages using an integer-forcing receiver.
Hosting Professor
Bobak Nazer (ECE, SE)