公开(公告)号：US3560855A

公开(公告)日：1971-02-02

申请号：US3560855D

申请日：1968-06-07

Applicant: BELL TELEPHONE LABOR INC

Inventor： SCHROEDER HENRY C

IPC: H04L27/01 ,  H04B3/14

CPC classification number: H04L27/01

Abstract: AN AUTOMATIC PASSBAND EQUALIZER FOR DIFFERENTIALLY COHERENT PHASE-MODULATION DATA TRANSMISSION SYSTEMS IS MADE ADAPTIVE TO ERROR INFORMATION DERIVED BY CORRELATING PHASE DIFFERENCES BETWEEN SUCCESSIVE ADJACENT SIGNALING INTERVALS WITH PHASE DIFFERENCES BETWEEN NONADJACENT SIGNALING INTERVALS SPANNING SUCH ADJACENT INTERVALS. THE ERROR INFORMATION IS PERIODICALLY INTEGRATED AND QUENCHED. DIFFERENCES BETWEEN SUCCESSIVE MAXIMUM INTEGRATION LEVELS YIELD A DISTORTION INDEX BY THE AID OF WHICH INCREMENTAL ADJUSTMENTS OF TAP ATTENUATORS IN A TRANSVERSAL EQUALIZER IN SERIES WITH A DATA DEMODULATOR ARE DIRECTED TO MINIMIZE SUCH DISTORTION.

公开(公告)号：US3529290A

公开(公告)日：1970-09-15

申请号：US3529290D

申请日：1968-05-10

Applicant: BELL TELEPHONE LABOR INC

Inventor： SCHROEDER HENRY C ,  SHEEHAN JOHN R

IPC: H04L1/00 ,  H03M13/00 ,  H04L1/20 ,  H04L27/18 ,  H04L27/22 ,  H04L27/233 ,  G08C25/00 ,  H04L1/10

CPC classification number: H04L27/2331 ,  H04L1/206

公开(公告)号：US3488440A

公开(公告)日：1970-01-06

申请号：US3488440D

申请日：1966-12-28

Applicant: BELL TELEPHONE LABOR INC

Inventor： LOGAN MASON A ,  SCHROEDER HENRY C

IPC: H04L7/033 ,  H04L7/04

CPC classification number: H04L7/0331

公开(公告)号：US3223941A

公开(公告)日：1965-12-14

申请号：US32149063

申请日：1963-11-05

Applicant: BELL TELEPHONE LABOR INC

Inventor： SCHROEDER HENRY C

IPC: H03H11/12

CPC classification number: H03H11/126