Abstract:
Constant envelope orthogonal frequency division multiplexing (CE-OFDM) is a promising power-efficient wave-form with a peak to average power ratio (PAPR) of 0 dB, which a...Show MoreMetadata
Abstract:
Constant envelope orthogonal frequency division multiplexing (CE-OFDM) is a promising power-efficient wave-form with a peak to average power ratio (PAPR) of 0 dB, which allows it to avoid power backoff and nonlinear distortion when passing through a high power amplifier (HPA). Never-theless, compared to orthogonal frequency division multiplexing (OFDM), the sensing accuracy of CE-OFDM is relatively poor. In this paper, an offset CE-OFDM (OCE-OFDM) scheme is introduced for integrated sensing and communication (ISAC), which enhances the communication and sensing performance with the aid of adjusted power distribution among subcarriers. Specifically, a element-constrained maximum likelihood (ML) estimator is proposed to mitigate the equivalent sensing noise in OCE-OFDM, whose Cramer-Rao Lower Bound (CRLB) and parameter setting are further analyzed. Theoretical analysis and simulation results under mm Wave channel model show that the proposed OCE-OFDM scheme is capable of achieving better trade-off between sensing and communication performance compared to conventional OFDM and CE-OFDM system.
Date of Conference: 21-24 April 2024
Date Added to IEEE Xplore: 03 July 2024
ISBN Information: