HDTV Antenna

[Dave Smith]

plug.org at 2nerds.com wrote:
> About the only
> thing you can do in such circumstances is use an antenna with a more
> "directional" pattern; it's not overall "gain" that is of interest,
> but the degree to which side and back lobes have significantly lower
> gain than the (hopefully narrow) forward lobe which is pointed towards
> the transmitting antenna.
>   

Are there HD receivers that use equalizers to clean signals with 
multipath interference like many microwave radios can? What about error 
correction codes?

--Dave