received signals have nothing to do with raising or lowering the standing wave of an antenna. If this guy thinks it does he should think real serious about pursuing a hobby such as ham radio or
cb.
if he is having this problem , he should look at his antenna and make sure he doesn't have a loose connection in the coax or the antenna itself. rain and ice ect will affect swr but if the antenna is ok this will usually correct itself when it dries out or the ice thaws.