People have been looking for TWDP fading ever since the distribution was published in 1999. Taken from the Wikipedia page on TWDP fading:
Two-Wave with Diffuse Power or TWDP is a model for predicting fading, an effect in radio propagation that causes a signal to be strengthened or weakened at certain locations or times. TWDP models fading due to the interference of two strong radio signals and numerous smaller, diffuse signals.