Index Modulation Based ISAC

Dingyou Ma, Tianyao Huang, Nir Shlezinger, Yimin Liu, Yonina C. Eldar

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

1 Scopus citations

Abstract

Index modulation (IM) is a promising communications technique gaining growing interest due to its high energy and spectral efficiency. In addition to using conventional modulations, IM also embeds data bits into the indices of certain waveform parameters, such as the selection of active antennas and the sub-carriers. Recently, IM has been introduced to design ISAC systems by embedding the digital message into the combinations of waveform parameters. Through IM, the information is encapsulated in the combinations of waveform parameters as well as the symbol constellation, leading to an increase in data rates. For the radar subsystem, the randomization in the waveform parameters, such as carrier frequencies and antenna elements, enables to reduce the hardware complexity while has minimal influence to the radar resolution, which is attractive to many cost limited applications. In this chapter, we provide an overview of IM for ISAC. We begin by formulating the generic model of IM-based ISAC systems. Subsequently, some instances of existing IM-based ISAC systems are discussed using the generic model. In the next, the signal processing algorithms for both radar and communications systems are surveyed. The performance metrics of IM-based ISAC systems are discussed, and evaluated through simulation. Finally, concluding remarks and future challenges are provided.

Original languageEnglish
Title of host publicationIntegrated Sensing and Communications
PublisherSpringer Nature
Pages241-268
Number of pages28
ISBN (Electronic)9789819925018
ISBN (Print)9789819925001
DOIs
StatePublished - 1 Jan 2023

ASJC Scopus subject areas

  • General Engineering

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