Another option you might choose is to connect your TV via Ethernet instead of WiFi (assuming your Samsung has that option.) I have a Sony TV and have found a wired connected is much more reliable than WiFi.
If you want to give a wired connection a try you can do so with an Actiontec ECB2500C coax adapater:
You would also need a one-to-two coax splitter. The coax feeding the TV now is split so one connection goes to the TV and one to the input of the MoCA adapter.
You then get a solid wired connection to the Internet at the Ethernet output port of the ECB2500. Run a Cat 5/6 patch cord from that port to the Ethernet port on your TV (again, assuming it has one) and that may solve your problem, having eliminated the vagaries of WiFi.