Retroactive Anti-Jamming for MISO Broadcast Channels

TL;DR

This paper investigates anti-jamming strategies for MISO broadcast channels, characterizing the degrees-of-freedom region under various information availability scenarios, and proposes countermeasures to mitigate jamming effects.

Contribution

It provides a comprehensive characterization of the DoF region for two-user MISO BC under different CSIT and JSIT assumptions, including partial multi-user extensions.

Findings

DoF region characterized for various CSIT and JSIT scenarios

Countermeasures improve robustness against jamming

Extensions to multi-user broadcast channels

Abstract

Jamming attacks can significantly impact the performance of wireless communication systems. In addition to reducing the capacity, such attacks may lead to insurmountable overhead in terms of re-transmissions and increased power consumption. In this paper, we consider the multiple-input single-output (MISO) broadcast channel (BC) in the presence of a jamming attack in which a subset of the receivers can be jammed at any given time. Further, countermeasures for mitigating the effects of such jamming attacks are presented. The effectiveness of these anti-jamming countermeasures is quantified in terms of the degrees-of-freedom (DoF) of the MISO BC under various assumptions regarding the availability of the channel state information (CSIT) and the jammer state information at the transmitter (JSIT). The main contribution of this paper is the characterization of the DoF region of the two user MISO BC under various assumptions on the availability of CSIT and JSIT. Partial extensions to the multi-user broadcast channels are also presented.