On the Impact of Phase Noise on Monostatic Sensing in OFDM ISAC Systems
Paper i proceeding, 2023

Phase noise (PN) can become a major bottleneck for integrated sensing and communications (ISAC) systems towards 6G wireless networks. In this paper, we consider an OFDM ISAC system with oscillator imperfections and investigate the impact of PN on monostatic sensing performance by performing a misspecified Cramér-Rao bound (MCRB) analysis. Simulations are carried out under a wide variety of operating conditions with regard to SNR, oscillator type (free-running oscillators (FROs) and phase-locked loops (PLLs)), 3-dB bandwidth of the oscillator spectrum, PLL loop bandwidth and target range. The results provide valuable insights on when PN leads to a significant degradation in range and/or velocity accuracy, establishing important guidelines for hardware and algorithm design in 6G ISAC systems.

misspecified Cramer-Rao bound

integrated sensing and communications


phase noise


Musa Furkan Keskin

Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk

Carina Marcus

Veoneer HoldCo, LLC

Olof Eriksson

Veoneer HoldCo, LLC

Henk Wymeersch

Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk

Visa Koivunen


Proceedings of the IEEE Radar Conference

10975764 (ISSN) 23755318 (eISSN)

Vol. 2023-May
9781665436694 (ISBN)

2023 IEEE Radar Conference, RadarConf23
San Antonia, USA,

A New Waveform for Joint Radar and Communications Beyond 5G

Europeiska kommissionen (EU) (EC/H2020/888913), 2020-09-01 -- 2022-08-31.

Gemensam radar och kommunikation för nästa generations fordonsapplikationer

VINNOVA (2021-02568), 2022-01-01 -- 2023-12-31.


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