Patent ID: 8804875
Filing Date: 2014-08-12
Classification: H03B,H03D,H04L

Abstract:
1. A method comprising: receiving a modulated signal having a variable phase component wherein the variable phase component includes phase variations in a first phase range; generating a phase-compressed signal having a compressed variable phase component by processing the received modulated signal with a second-harmonic injection locking oscillator (ILO), wherein the compressed variable phase component includes phase variations in a compressed phase range being substantially one half the first phase range; generating a delayed phase-compressed signal having a delayed compressed variable phase component that is delayed relative to the compressed variable phase component; combining the phase-compressed signal and the delayed phase-compressed signal to obtain an estimated derivative of the variable phase component; generating an estimated variable phase component signal by filtering the estimated derivative of the variable phase component; and, providing the estimated phase signal to a polar demodulation circuit.