Patent ID: 8102785

Claim:
A method of calibrating a base station comprising a plurality of antennas for beamsteering forward link traffic data to a target mobile in a time division duplex (TDD) wireless communication system, each antenna being connected to a corresponding radio via a transmit/receive switch that is configured to switch between a receive path and a transmit path, the method comprising: transmitting a first signal from a first radio via a first cross-over cable coupled to the first radio and a second radio such that the first signal is received by the second radio; transmitting a second signal from the second radio via a second cross-over cable coupled between the first and second radios such that the second signal is received by the first radio, wherein the first and second cross-over cables are length-matched cross-over cables; and determining, based on at least one of the first or second signals, a relative weight that can be applied to traffic signals transmitted from the second radio.