公开(公告)号：FR2394218A1

公开(公告)日：1979-01-05

申请号：FR7718762

申请日：1977-06-10

Applicant: IBM FRANCE

Inventor： LAUTIER ALEX ,  MONROLIN JEAN

IPC: H04L27/22 ,  H04L27/227

公开(公告)号：FR1533919A

公开(公告)日：1968-12-06

申请号：FR06008412

申请日：1967-03-07

Applicant: IBM FRANCE

Inventor： GOROG ETIENNE ,  MONROLIN JEAN ,  PIERRET JEAN-MARC

IPC: H04L25/48 ,  H04L25/497

公开(公告)号：FR2368184A1

公开(公告)日：1978-05-12

申请号：FR7632450

申请日：1976-10-18

Applicant: IBM FRANCE

Inventor： MONROLIN JEAN

IPC: H03L7/06 ,  H04B7/155 ,  H04L27/00 ,  H04L27/227 ,  H04J3/02 ,  H04B7/185

Abstract: This invention concerns a carrier synchronization system for a four-phase coherent PSK demodulator. The four-phase PSK signal is demodulated by an in-phase reference carrier and a quadrature reference carrier both of which are locally generated by a reference carrier source. The in-phase and quadrature components of the four-phase PSK signal that result from these demodulation operations are delayed a time interval substantially equal to T/2 seconds, T being the signaling period. The product of the delayed in-phase component and the sign of the quadrature component is compared with the product of the delayed quadrature component and the sign of the in-phase component, to produce a phase error signal. This error signal is used to control the adjustment of the reference carrier source.

公开(公告)号：FR1546727A

公开(公告)日：1968-11-22

申请号：FR06008733

申请日：1967-10-06

Applicant: IBM FRANCE

Inventor： MONROLIN JEAN

IPC: H03D1/22 ,  H03D3/00 ,  H04L27/06

公开(公告)号：FR1533918A

公开(公告)日：1968-07-26

申请号：FR06008411

申请日：1967-03-07

Applicant: IBM FRANCE

Inventor： MONROLIN JEAN ,  PIERRET JEAN-MARC

IPC: H04L25/48 ,  H04L25/497