Modeling channel in case of deceleration of the receiver

Hello,

Does anyone know a model which could emulate small scale fading effect in case of a constant deceleration of the receiver in a communication ?

I tryed to use model such as Clark's or others based on sum of sines, but when receiver has a constant deceleration, those models are even function. Here is my code :

for i = 1 : nombreEchantillons

        speed = initialSpeed + (deceleration * time(i))*10^-3 * 3600;

        v(i) = speed ;
    fd = fc * v(i) / c ;

    for k = 1 : N
        channel(i) = channel(i) + sqrt(1/N) * exp(1i*phin(k))*exp(1i * 2 * pi * fd * Ts * i * cos(alphan(k))) ;
    end

end

alphan and phin are random variables U[0;2pi[.

Thank you for helping.