公开(公告)号：HUT59267A

公开(公告)日：1992-04-28

申请号：HU319890

申请日：1990-05-25

Applicant: MOTOROLA INC

Inventor： CAANALTE GARY A ,  BURKE DENNIS E

IPC: H04L25/06 ,  H04L27/14

Abstract: There is provided a scheme for centering data prior to detection. It is characterized by: determining carrier frequency error, and pre-adjusting (G1) the data detection process to compensate for that error throughout the ensuing data detection. This scheme for reliable multi-level data detection is further characterized by: upon detection of carrier presence, determining carrier frequency error, gating (G1) a voltage associated with the frequency error (C1) to the differential amplification process (DIFF) to establish common mode rejection and compensating for that error (C1) throughout the ensuing multi-level data detection, and then analog-to-digital conversion (A/D) of the differentially amplified multi-level data. A scheme for computationally centering the subsequent data detected to compensate for the error is also provided.

公开(公告)号：HU903198D0

公开(公告)日：1990-10-28

申请号：HU319890

申请日：1990-05-25

Applicant: MOTOROLA INC

Inventor： CAANALTE GARY A ,  BURKE DENNIS E

IPC: H04L25/06 ,  H04L27/14

Abstract: There is provided a scheme for centering data prior to detection. It is characterized by: determining carrier frequency error, and pre-adjusting (G1) the data detection process to compensate for that error throughout the ensuing data detection. This scheme for reliable multi-level data detection is further characterized by: upon detection of carrier presence, determining carrier frequency error, gating (G1) a voltage associated with the frequency error (C1) to the differential amplification process (DIFF) to establish common mode rejection and compensating for that error (C1) throughout the ensuing multi-level data detection, and then analog-to-digital conversion (A/D) of the differentially amplified multi-level data. A scheme for computationally centering the subsequent data detected to compensate for the error is also provided.