Pseudonoise (pn) synchronization of data system with derivation of clock frequency from received signal for clocking receiver pn generator

Claim 1

IN A DIGITAL DATA COMMUNICATION SYSTEM A DETECTION STAGE FOR RECEIVING A FIRST CLOCK SIGNAL MODULATED BY BINARY DATA AND A SECOND CLOCK SIGNAL MODULATED BY A FIRST CYCLIC CODE FORM A FIRST CYCLIC CODE GENERATOR TO DETECT SAID BINARY DATA COMPRISING: CLOCK SIGNAL RECONSTRUCTING MEANS RESPONSIVE TO SAID MODULATED FIRST CLOCK SIGNAL FOR PROVIDING A THIRD UNMODULATED CLOCK SIGNAL WHICH IS RELATED TO SAID FIRST AND SECOND CLOCK SIGNALS; A SECOND CYCLIC CODE GENERATOR; FIRST MEANS RESPONSIVE TO SAID THIRD UNMODULATED CLOCK SIGNAL FOR CAUSING THE SECOND CYCLIC CODE GENERATOR TO PROVIDE A SECOND CYCLIC CODE; AND SECOND MEANS RESPONSIVE TO SAID FIRST MEANS AND SAID SECOND CYCLIC CODE FOR SYNCHRONIZING SAID FIRST AND SECOND CYCLIC CODES BY AUTOCORRELATING SAID SECOND CLOCK SIGNAL MODULATED BY SAID FIRST CYCLIC CODE.