An output-power threshold is selected such that one or more signal requirements is not outside a pre-determined range when output power of a polar transmitter is less than the output-power threshold. A determination is made whether the output power is less than the threshold. In response to a determination...http://www.google.de/patents/US6892057?utm_source=gb-gplus-sharePatent US6892057 - Method and apparatus for reducing dynamic range of a power amplifier
