Patent ID: 7333780
Filing Date: 2008-02-19
Classification: H03C,H04B

Abstract:
1. A polar modulation transmission apparatus comprising: a polar signal generation circuit that generates an amplitude signal for synchronization adjustment and a phase signal for synchronization adjustment; a high-frequency phase modulated signal formation circuit that forms a high-frequency phase modulated signal by modulating a carrier frequency signal with said phase signal; a combination circuit that combines said amplitude signal and said phase signal by making variable the amplitude of said high-frequency phase modulated signal according to said amplitude signal; a delay difference detection circuit that detects a delay difference between said amplitude signal for synchronization adjustment and said phase signal for synchronization adjustment based on the outputs from circuits that process said phase signal and said amplitude signal in their respective baseband signal states; and a synchronization adjustment circuit that carries out synchronization adjustment when said high-frequency phase signal and said amplitude signal are combined by adjusting delays of said amplitude signal and said phase signal based on said detected delay difference.