hi..
i don't know, from which country u r....!!!
see what suits u according to the jobs available in ur country..
furthermore, i don't know whether some univeristies offer masters in this field !!!
because, many universities offer masters in communication, electronics, or electrical.. u can choose some courses of ur choice according to ur liking.. u can also do theisis of ur choice...
i am M.Sc. Electrical (Elecronic and comm.)..my thesis is on OFDM..
Regards
Naveed