Asymptotically Optimal Aperiodic and Periodic Sequence Sets with Low Ambiguity Zone Through Locally Perfect Nonlinear Functions

TL;DR

This paper introduces a new class of locally perfect nonlinear functions to construct asymptotically optimal low ambiguity zone sequences for integrated sensing and communication, achieving the first known aperiodic LAZ sequence sets.

Contribution

It proposes LPNFs and interleaving techniques to create novel periodic and aperiodic LAZ sequence sets with optimal bounds, including the first aperiodic construction.

Findings

Periodic LAZ sequences are asymptotically optimal.

Aperiodic LAZ sequences also meet optimal bounds.

Proposed sequences are cyclically distinct.

Abstract

Low ambiguity zone (LAZ) sequences play a crucial role in modern integrated sensing and communication (ISAC) systems. In this paper, we introduce a novel class of functions known as locally perfect nonlinear functions (LPNFs). By utilizing LPNFs and interleaving techniques, we propose three new classes of both periodic and aperiodic LAZ sequence sets with flexible parameters. The proposed periodic LAZ sequence sets are asymptotically optimal in relation to the periodic Ye-Zhou-Liu-Fan-Lei-Tang bound. Notably, the aperiodic LAZ sequence sets also asymptotically satisfy the aperiodic Ye-Zhou-Liu-Fan-Lei-Tang bound, marking the first construction in the literature. Finally, we demonstrate that the proposed sequence sets are cyclically distinct.