Isolate the effect of the shorter absolute-delay window

Determine whether the shorter absolute-delay window in the 100 MHz configuration contributes to the observed positioning improvement, independently of the increase in propagation bandwidth, by holding the absolute-delay window constant across configurations.

Background

The study compares 40 MHz and 100 MHz operating configurations, but changing the configuration simultaneously changes the occupied bandwidth, sampling rate, tap spacing, and physical duration of the 71-tap channel window. Consequently, the reported improvement at 100 MHz cannot be attributed solely to propagation bandwidth. An experiment that keeps the absolute-delay window constant is needed to determine whether the shorter window itself contributes to the result.

References

We did not hold the absolute-delay window constant, so a residual contribution from the shorter window of configuration~B cannot be excluded.

— A Ray-Traced Digital Twin for 5G NR Positioning with OpenAirInterface  (2610.13138 - Chaharbaghi et al., 9 Oct 2026) in Section 5.2, “Two bandwidths”