公开(公告)号：JP2000151733A

公开(公告)日：2000-05-30

申请号：JP30788599

申请日：1999-10-29

Applicant: LUCENT TECHNOLOGIES INC

Inventor： JOHNSON ROBERT E ,  VELLA-COLEIRO GEORGE P

IPC: H04L27/227 ,  H04L27/22 ,  H04L27/233

Abstract: PROBLEM TO BE SOLVED: To provide a phase shift keying(PSK) modulator and a modulation method which use a period width window technique. SOLUTION: This demodulator 10 demodulates a PSK communication signal by using a synchronizer 12, a period window detector 20 and a logical device 22. The synchronizer 12 supplies a transition signal for indicating a reference edge of a communication synchronizer. A period window connected to the synchronizer 12 establishes a time period on the basis of a period of the transition signal. The logical device 22 which has input connected to output of the period window detector 20 generates a logical output signal. This demodulator 10 is equipped with a carrier wave boundary detector 34 for turning a message into a frame and minimizing detection of a noise, thus it becomes possible to measure a signal intensity oven a wide dynamic range.

公开(公告)号：DE69935055T2

公开(公告)日：2007-07-19

申请号：DE69935055

申请日：1999-10-18

Applicant: LUCENT TECHNOLOGIES INC

Inventor： JOHNSON ROBERT E ,  VELLA-COLEIRO GEORGE P

IPC: H04L27/227 ,  H04L27/233 ,  H04L27/22

Abstract: A demodulator (10) demodulates a PSK communications signal using a synchronizer (12), a period window detector (20), and a logic device (22). The synchronizer provides a transition signal representing reference edges of the communication signal. The period window detector, coupled to the synchronizer, establishes a time interval based on the period of the transition signal. Finally, the logic device, having logic inputs coupled to the outputs of the period-window detector, yields a logic output signal. The demodulator preferably includes a carrier boundary detector (34) for framing messages and minimizing noise detection in a manner that permits signal strength measurements over a wide d ynamic range.

公开(公告)号：AU5597999A

公开(公告)日：2000-05-04

申请号：AU5597999

申请日：1999-10-20

Applicant: LUCENT TECHNOLOGIES INC

Inventor： VELLA-COLEIRO GEORGE P ,  JOHNSON ROBERT E

IPC: H04L27/227 ,  H04L27/22 ,  H04L27/233

Abstract: A demodulator (10) demodulates a PSK communications signal using a synchronizer (12), a period window detector (20), and a logic device (22). The synchronizer provides a transition signal representing reference edges of the communication signal. The period window detector, coupled to the synchronizer, establishes a time interval based on the period of the transition signal. Finally, the logic device, having logic inputs coupled to the outputs of the period-window detector, yields a logic output signal. The demodulator preferably includes a carrier boundary detector (34) for framing messages and minimizing noise detection in a manner that permits signal strength measurements over a wide d ynamic range.

公开(公告)号：DE69935055D1

公开(公告)日：2007-03-22

申请号：DE69935055

申请日：1999-10-18

Applicant: LUCENT TECHNOLOGIES INC

Inventor： JOHNSON ROBERT E ,  VELLA-COLEIRO GEORGE P

IPC: H04L27/227 ,  H04L27/233 ,  H04L27/22

Abstract: A demodulator (10) demodulates a PSK communications signal using a synchronizer (12), a period window detector (20), and a logic device (22). The synchronizer provides a transition signal representing reference edges of the communication signal. The period window detector, coupled to the synchronizer, establishes a time interval based on the period of the transition signal. Finally, the logic device, having logic inputs coupled to the outputs of the period-window detector, yields a logic output signal. The demodulator preferably includes a carrier boundary detector (34) for framing messages and minimizing noise detection in a manner that permits signal strength measurements over a wide d ynamic range.