A phantom RACH? Is it a real problem or just a good exist from the problem ? everything has a reason so what is the source of ghost RACH? hardware or radio? and how?
as I know TA is measuring the distance of the MS’s based on the signal trip time. I mean it is not a direct distance measure; it just measure the distance by multiplying the time by the speed of the signal. Your high TA maybe caused by the fast cars moving away from the site !