Jamming Suppression Via Resource Hopping in High-Mobility OTFS-SCMA Systems

TL;DR

This paper introduces a resource hopping technique in OTFS-SCMA systems to effectively suppress jamming effects like NBI and PIN, enhancing uplink communication robustness in high-mobility scenarios.

Contribution

A novel resource hopping mechanism for OTFS-SCMA systems that mitigates jamming in high-mobility uplink scenarios, improving BER performance over static schemes.

Findings

Hopping reduces BER under jamming conditions.

Turbo equalization enhances jamming resilience.

Resource hopping outperforms static allocation schemes.

Abstract

This letter studies the mechanism of uplink multiple access and jamming suppression in an OTFS system. Specifically, we propose a novel resource hopping mechanism for orthogonal time frequency space (OTFS) systems with delay or Doppler partitioned sparse code multiple access (SCMA) to mitigate the effect of jamming in controlled multiuser uplink. We analyze the non-uniform impact of classic jamming signals such as narrowband interference (NBI) and periodic impulse noise (PIN) in delay-Doppler (DD) domain on OTFS systems. Leveraging turbo equalization, our proposed hopping method demonstrates consistent BER performance improvement under jamming over conventional OTFS-SCMA systems compared to static resource allocation schemes.