Suggestions: Network Link Under the TV

[TexUs]

Hi guys...

In a nutshell, I only have one coax cable going to my TV (it's run between the upstairs and downstairs, can't run another- it's not possible- I've tried).
I have cable internet going over this cable. I now have a need to send OTA Antenna HD down this cable, too. The problem is- the both can't co-exist on the same coax cable.

So- either I need to make the antenna signal wireless to the Tuner, OR, I need to make the internet wireless to below the TV.

Which is suggested? And via what method? My current wireless router is the WNDR3700

 

[TexUs]

Additional info...

I need internet connections under the TV for:

Xbox 360 S
BluRay player (network updates)
Media Center


The 360 already has Wireless N, but I've never used it.
Would buying a Wireless N card for the Media Center machine be better than bridging a link between two routers so it's still "hard wired"?
(I figure I can suffer doing manual updates on the BR player- it only updates every couple of months anyway).

 

[stevech]

You can send your home LAN (IP) over the TV coax with a pair of MoCA boxes. See the topic area here on MoCA.
Works well.
I have a MoCA box at my TV, connected to an ethernet switch, so several IP devices can connect at that place.

MoCA uses frequencies other than TV channels and cable modem frequencies.