Patent ID: 6643500
Filing Date: 2003-11-04
Classification: H01Q,H04B

Abstract:
A method of reducing distortion in a radiocommunication system having a plurality of antenna elements forming an antenna array, and at least two receiver channels associated with respective portions of the array, each of the channels including an amplifier for amplifying received signals, said method comprising the steps of:receiving a radio signal at a carrier frequency with the antenna array; supplying the signal received by each portion of the array to each portion's associated receiver channel; in each receiver channel: phase-shifting the received signal in a first direction by a predetermined angle prior to the signal reaching the channel's respective amplifier; amplifying the phase-shifted signal in each channel's respective amplifier; and after amplifying the phase-shifted signal, phase-shifting the amplified signal by the predetermined angle in a second direction that is opposite to the first direction to produce an output signal from each receiver channel; and supplying the output signals from each of the receiver channels to a summation device.