What you are looking for is "Point to Point Wireless Ethernet". If the cable company will actually provide you your internet connection AND allow you to mount an antenna on the tower. then this is what you need. There are 2 types of systems using different frequencies. One requires an FCC radio license and the other does not.
These types of systems are frequently used around campus type environments to create a network connection where cables are hard to run. This site has some good research info Point to Point Wireless Products & Services by Meridian Microwave | PTP
These types of systems are frequently used around campus type environments to create a network connection where cables are hard to run. This site has some good research info Point to Point Wireless Products & Services by Meridian Microwave | PTP