Patent ID: 7962174
Filing Date: 2011-06-14
Classification: H03F,H04W,Y02D

Abstract:
1. A system for wireless communications comprising: a tower structure supporting at least one transmit antenna at an elevated position on the tower structure; base electronics positioned proximate a base of the tower structure and coupled with the transmit antenna, the base electronics including an initial stage amplifier for initially amplifying an input signal proximate the base of the tower to provide a low power transmission signal that is then provided to the transmit antenna at the elevated position; a final stage amplifier positioned away from the base electronics and at the elevated position with the transmit antenna, the final stage amplifier being a high efficiency amplifier for efficiently amplifying the low power transmission signal from the base electronics to provide a high power transmission signal to be transmitted from the transmit antenna; the base electronics further including a predistortion circuit positioned proximate the base of the tower for predistorting the input signal to the initial stage amplifier; a predistortion receiver positioned proximate the final stage amplifier at the elevated position and coupled with the predistortion circuit, the predistortion receiver configured to receive a representative sample of the high power transmission signal for use by the predistortion circuit.