US 2026/0312694 A1 · DIFFERENTIAL PHASE SHIFT KEYING DEMODULATOR

Abstract

Demodulation of differential phase shift keying (DPSK) signals. A system implementing the techniques according to an embodiment includes a magnitude/phase calculator configured to convert in-phase and quadrature phase components of a signal to magnitude and phase samples. The system also includes a preamble detector configured to detect a preamble in the signal based on the magnitude samples. The system further includes a synchronization phase reversal (SPR) detector configured to detect an SPR in the signal to generate a demodulation timing gate. The detection of the SPR is based on the phase samples and on an SPR time offset relative to the detected preamble. The system further includes a phase correction circuit configured to compensate for phase wrapping of the phase samples to generate corrected phase samples, and a DPSK demodulator configured to integrate the corrected phase samples over integration periods, based on the demodulation timing gate, to demodulate the signal.

Claims20

Dependent claims

A system for demodulating a signal, the system comprising:

a magnitude/phase calculator configured to convert an in-phase component of a signal and a quadrature phase component of the signal to magnitude samples and phase samples;
a synchronization phase reversal (SPR) detector configured to detect an SPR in the signal to generate a demodulation timing gate, the detection of the SPR based on the phase samples and based on an SPR time offset relative to a preamble in the signal;
a phase correction circuit configured to compensate for phase wrapping of the phase samples to generate corrected phase samples for demodulation;
and
a differential phase shift keying (DPSK) demodulator configured to integrate the corrected phase samples over integration periods to demodulate the signal, the integration periods based on the demodulation timing gate.

2 more elements

A computer program product including one or more non-transitory machine-readable mediums encoded with instructions that when executed by one or more processors cause a process to be carried out for signal demodulation, the process comprising:

receiving a signal at an antenna;
converting an in-phase component of the signal and a quadrature phase component of the signal to magnitude samples and phase samples;
detecting a preamble in the signal based on the magnitude samples;
detecting a synchronization phase reversal (SPR) in the signal to generate a demodulation timing gate, the detection of the SPR based on the phase samples and based on an SPR time offset relative to the detected preamble;
compensating for phase wrapping of the phase samples to generate corrected phase samples for demodulation;
and
integrating the corrected phase samples over integration periods to perform differential phase shift keying (DPSK) demodulation of the signal, the integration periods based on the demodulation timing gate.

4 more elements

A method for signal demodulation, the method comprising:

receiving a signal at an antenna;
converting an in-phase component of the signal and a quadrature phase component of the signal to magnitude samples and phase samples;
detecting a preamble in the signal based on the magnitude samples;
detecting a synchronization phase reversal (SPR) in the signal to generate a demodulation timing gate, the detection of the SPR based on the phase samples and based on an SPR time offset relative to the detected preamble;
compensating for phase wrapping of the phase samples to generate corrected phase samples for demodulation;
and
integrating the corrected phase samples over integration periods to perform differential phase shift keying (DPSK) demodulation of the signal, the integration periods based on the demodulation timing gate.

4 more elements

Dependencies are inferred from the claim text.

Differential phase shift keying demodulator

Life of this patent

Differential phase shift keying demodulator

Life of this patent

Abstract

Claims20