Dispersion-aware target localization in wideband OFDM-PASS

Develop a dispersion-aware target localization method for wideband OFDM pinching-antenna systems, where the nonlinear frequency dependence of in-waveguide propagation causes range-domain distortion.

Background

Existing PASS-ISAC studies primarily address the narrowband regime, in which the in-waveguide propagation phase does not introduce the same frequency-dependent distortion across the OFDM band. In wideband OFDM-PASS systems, the waveguide propagation constant varies nonlinearly with frequency, causing dispersion in the effective transmit channel and corrupting conventional range estimation.

The paper identifies the corresponding dispersion-aware target localization problem as unresolved. The proposed work addresses this gap by developing a physics-guided localization framework, DiPL-Net, which uses a dispersion-aware range dictionary and dual-kernel residual architecture. Although the problem is stated as unresolved in the related-work discussion, the paper presents a proposed solution and simulation-based evaluation rather than a general characterization of the problem.