The Tv transmissions are Very Strong at your location. If the house is wood frame with wood or vinyl siding and if the roof is not metal and there is no metal foil backed insulation. Then install a indoor antenna at each Tv location , a Channel Master CM4010 or Terk HDTVi. Aim the indoor antenna at about 110 degree magnetic compass , here is how to aim indoor antennas ,
http://www.kyes.com/antenna/pointing/pointing.html. The Tv must scan for the Digital Broadcast Tv Channels , sometimes called the , 'Air Channels' or 'Antenna Channels' in the Tv menu because the transmissions travel through air from the transmitting antenna to the receiving antenna. . A indoor antenna will not receive in the basement. Do Not scan for cable Tv channels.