Patent ID: 7957700
Filing Date: 2011-06-07
Classification: H04B

Abstract:
1. An apparatus, comprising: at least two transmitter units; wherein each of the at least two transmitter units are configured to input an instance of a digital transmit signal, convert the digital transmit signal to an analog radio signal, and amplify the analog radio signal, and wherein the apparatus is configured to: determine a timing difference between the amplified analog signals, and adjust a timing of at least one of the digital input signals, so that a predetermined criterion is fulfilled; sum the amplified analog signals from the at least two transmitter units to a sum signal; convert the sum signal to a digital feedback sum signal; cease processing of one of the at least two transmitter units; observe the digital feedback sum signal while ceasing signal processing of one of the at least two transmitter units; and determine a timing influence of the ceased signal on the observed digital feedback sum signal.