Peilin Zheng

Ray-traced multipath component lists are not what a practical receiver observes, because array aperture and system bandwidth limit angular and delay resolution. UrbanADPSMap maps each link's multipath set onto fixed grids through a bandwidth-limited delay kernel and an aperture-limited angular kernel, with a validity mask so training and evaluation share one support. On this benchmark, SpecFlowAR uses multi-scale autoregressive flow matching to sample a coarse dispersion envelope and then refine peaks and low-power tails; on the test set under a unified budget it reaches 2.03 dB BPL@5, 29.12 ns delay-spread error and 10.82 degree azimuth-spread-of-arrival error.

Ray-traced multipath component lists are not what a practical receiver observes, because array aperture and system bandwidth limit angular and delay resolution. UrbanADPSMap maps each link's multipath set onto fixed grids through a bandwidth-limited delay kernel and an aperture-limited angular kernel, with a validity mask so training and evaluation share one support. On this benchmark, SpecFlowAR uses multi-scale autoregressive flow matching to sample a coarse dispersion envelope and then refine peaks and low-power tails; on the test set under a unified budget it reaches 2.03 dB BPL@5, 29.12 ns delay-spread error and 10.82 degree azimuth-spread-of-arrival error.