Patent ID: 8767626
Filing Date: 2014-07-01
Classification: H04B,H04L,H04W

Abstract:
1. A method of operating a wireless communication transmitter configured to transmit a multi-carrier signal, the multi-carrier signal being an aggregation of two or more separately modulated carriers occupying distinct frequency regions, the method comprising: obtaining a baseline multi-carrier metric indicative of an amount by which a multi-carrier signal's maximum transmit power should be reduced from a pre-determined nominal maximum transmit power to satisfy a predetermined out-of-band emission requirement when different scrambling codes are used on all carriers that are combined to create the multi-carrier signal; estimating a compensating metric adjustment value that compensates for a multi-carrier metric estimation error that results from use of a same scrambling code on two or more of the carriers that are combined to create the multi-carrier signal; obtaining a final multi-carrier metric indicative of the amount by which the multi-carrier signal's maximum transmit power should be reduced from the pre-determined nominal maximum transmit power to satisfy the predetermined out-of-band emission requirement by, under at least some circumstances, adjusting the baseline multi-carrier metric by an amount based on the compensating metric adjustment value when the same scrambling code is used on the two or more of the carriers that are combined to create the multi-carrier signal; and using the final multi-carrier metric to at least partially control a transmit power level of the wireless communication transmitter.