×

System for coherent demodulation of binary phase shift keying signals (BPSK)

  • US 20060193401A1
  • Filed: 01/30/2006
  • Published: 08/31/2006
  • Est. Priority Date: 02/28/2005
  • Status: Active Grant
First Claim
Patent Images

1. A system for the coherent demodulation of Binary Phase Shift Keying (BPSK) signal at a frequency f, comprising:

  • means for recovering a carrier signal (C) at a frequency 2f from said BPSK signal, means for injecting said signal having a frequency 2f in an injection locking oscillator (ILO), which has a natural resonant frequency fr, being fr substantially equal to f, which provides with differential output (Op, On) signals which recover the original carrier with a phase shift of (θ

    e

    k)/2, where θ

    e
    =arcsin

    (fr-fα







    Ai

    f
    )
    where α and

    k are parameters that depend on the type of predominant non-linearity in the injection locking oscillator (ILO), and Ai is the amplitude of the recovered carrier signal at a frequency of 2f, and means for combining the differential output (Op, On) signals with a copy of the incoming BPSK signal in order to generate a demodulated signal (DEMOD).

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×