公开(公告)号：CA2160431A1

公开(公告)日：1996-05-01

申请号：CA2160431

申请日：1995-10-12

Applicant: MOTOROLA INC

Inventor： BAKKE BRADLEY B ,  ARENS JOHN WILLIAM

IPC: G01S7/292 ,  H03D3/02 ,  H04B7/26 ,  H04L7/10 ,  H04L27/22 ,  H04B1/16

Abstract: A burst detector (140) detects the occurrence of a burst in a signal receiver. A filter (220) having an impulse response characteristic of an expected burst filters a received signal. A subtractor (230) subtracts a filtered version of the received signal from a delayed and filtered version of the received signal to provide a detection signal. A burst edge detector (250) detects a leading edge of the burst based on the detection signal.

公开(公告)号：CA2161057A1

公开(公告)日：1996-05-02

申请号：CA2161057

申请日：1995-10-20

Applicant: MOTOROLA INC

Inventor： BLASIAK DARIUSZ ANDRZEJ ,  ARENS JOHN WILLIAM

IPC: H04L27/22 ,  H03D3/06 ,  H03D3/22 ,  H03K20060101 ,  H03M13/00 ,  H03M13/23 ,  H04L20060101 ,  H04L1/00 ,  H04L27/227 ,  H04Q7/20

公开(公告)号：CA2161057C

公开(公告)日：1999-01-19

申请号：CA2161057

申请日：1995-10-20

Applicant: MOTOROLA INC

Inventor： BLASIAK DARIUSZ ANDRZEJ ,  ARENS JOHN WILLIAM

IPC: H04L27/22 ,  H03D3/06 ,  H03D3/22 ,  H03K20060101 ,  H03M13/00 ,  H03M13/23 ,  H04L20060101 ,  H04L1/00 ,  H04L27/227 ,  H04Q7/20

Abstract: A decoding apparatus (200) decodes a coherent, differentially encoded multi-level phase shift keying (DEPSK) modulated signal. A coherent receiver (101) receives and, subsequently, outputs the coherent DEPSK modulated signal to a metric computer (201). The metric computer (201) generates a soft decision metric ?(?(n)) corresponding to the coherent DEPSK modulated signal which is outputted to a forward error correction (FEC) decoder (107). The FEC decoder (107) decodes the coherent DEPSK modulated signal in accordance with the soft decision metric ?(?(n)) corresponding to the coherent DEPSK modulated signal.

公开(公告)号：CA2062776C

公开(公告)日：1996-06-04

申请号：CA2062776

申请日：1991-04-09

Applicant: MOTOROLA INC

Inventor： ARENS JOHN WILLIAM ,  BORTH DAVID EDWARD ,  KEPLER JAMES FRANK MICHAEL

IPC: H04B1/16 ,  H03G3/20 ,  H04B1/30 ,  H04B7/005 ,  H04L27/14 ,  H04L27/22

Abstract: There is provided a mechanism for Automatic Gain Control in a receiver. It comprises: determining, within a certain dynamic range, the difference in power between the desired signal and a signal received, and providing open loop gain control for the signal in response to the differential so determined, scaled by the receiver's gain characteristics, such that the signal is positioned within dynamic range so as to reduce saturation and noise.