Speed Profile Interpolation

Demonstrate the impact of terminal variable speed motion (acceleration/deceleration) on channel sampling.

Real-World Applications

High-Speed Rail Channel Simulation: When high-speed trains travel at 350km/h, channel sampling must meet the spatial Nyquist criterion (at least 2 samples per half wavelength). This experiment shows how to first generate channels at low density then use interpolation to recover high-density results, saving over 90% computation time.

Experiment Steps

Constant Speed Sampling: Observe uniform sampling intervals during constant speed motion
Variable Speed Interpolation: Acceleration/deceleration requires denser sampling to satisfy Nyquist theorem

Simulation Experiment

Speed Profile Interpolation

Power Delay Profile (PDP) - Simulated Channel Response

Time: 0s■ LOS Region■ NLOS Region (Multipath Rich)20s

Constant

v = const

Accelerating

v = v₀ + at

Decelerating

v = v₀ - at

Principle: PDP heatmap shows channel delay spread over time. Bright=strong signal, dark=weak signal. NLOS regions (multipath rich) have larger delay spread. For varying speed, sample density must satisfy spatial Nyquist criterion.

Parameters(Real-time)

Speed Mode (0=Const, 1=Accel, 2=Decel)0

Max Speed15 m/s

← Parameter Generation & Time Evolution

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