Patent ID: 6977965
Filing Date: 2005-12-20
Classification: H04L

Abstract:
1. In a receiver for receiving phase shift key modulated signals including an in-phase (I) component and a quadrature (Q) component, apparatus for decoding the phase shift key modulated signals comprising: a converter arranged to convert the I component to a digital I component and arranged to convert the Q component to a digital Q component; a first detector arranged to generate a first sync signal in response to a state transition of at least a portion of one of the digital I and Q components; a second detector arranged to generate a second sync signal in response to a predetermined amplitude of at least a portion of one of the digital I and Q components; a decoder responsive to the digital I component and digital Q component to decode the phase shift key modulated signals in response to a clock signal having a phase; and a clock generator arranged to generate the clock signal in response to said first sync signal and said second sync signal to adjust the phase so that the phase shift key modulated signals are decoded by the decoder.