Communication-Efficient Federated Learning Over MIMO Multiple Access Channels

Wireless Multiple Access Communication over Collision Frequency Shift Channels

A collision frequency shift keyed system (CFSK) using M-ary FSK signaling is investigated. CFSK is a wireless multiple access system in which users access a channel without cooperation. This results in collisions when users simultaneously transmit signals in the same frequency band. However, analysis has shown that the CFSK system has the potential to achieve greater capacities than binary mult...

Power efficient multimedia communication over wireless channels

In this work, we introduce an approach for minimizing the total power consumption of a mobile transmitter due to source compression, channel coding and transmission subject to a fixed end-to-end source distortion. We illustrate our approach both on an abstract class of sources and channels and on a realistic H.263 video transmission system through a wireless channel. Performance under different...

Reliable Computation over Multiple-Access Channels

In the standard multiple-access problem, a central access point needs to reconstruct the signals observed by each user separately. Suppose now that the access point only reconstructs the sum (or any other function) of these observed signals. For this problem, we develop strategies and information-theoretic performance bounds. It is shown that in general, separating source from channel coding le...

MIMO MC-CDMA Systems over Indoor Optical Wireless Communication Channels

Communication Over MIMO Broadcast Channels Using Lattice-Basis Reduction1

A new viewpoint for adopting the lattice reduction in communication over MIMO broadcast channels is introduced. Lattice basis reduction helps us to reduce the average transmitted energy by modifying the region which includes the constellation points. The new viewpoint helps us to generalize the idea of lattice-reduction-aided precoding for the case of unequal-rate transmission, and obtain analy...