Dual Mobility

Both Tx and Rx moving simultaneously, simulating bidirectional Doppler in V2V/D2D scenarios.

Real-World Applications

V2V Vehicle-to-Vehicle Communication: In C-V2X sidelink, both transmitter and receiver are mobile. Compared to traditional BS-UE scenarios, the Doppler spectrum changes from "bathtub" shape to "tent" shape, frequency offset doubles, making channel estimation more difficult.

Experiment Steps

1. Relative Speed: Doppler stacks when moving towards each other
2. V2V Channel: Observe fast fading characteristics in V2V scenes

Simulation Experiment