I have an issue with my cable signal. The Comcast analog signal comes in basement. From there it is split (Comcast splitter) to a TV downstairs and one upstairs. The downstairs receives a nice picture. The upstairs has poor video and sound. I believe, before the basement was finished, that cheap cable was used to go upstairs. The basement is now finished; running new cable is not an option. Would an amplifier help the signal get upstairs without distortion? Are there reasonable ($$) wireless options?

Note: at one point we had digital cable with a digital box from Comcast. We still had a poor picture upstairs.

Thanks,
Paul