公开(公告)号：JP2000201087A

公开(公告)日：2000-07-18

申请号：JP32551399

申请日：1999-11-16

Applicant: MOTOROLA INC

Inventor： VINGGAARD NIELS ,  BATRA ASHISH ,  ROBERTSON BRETT ,  CLASSON BRIAN KEITH

IPC: G06F11/10 ,  H03M13/13 ,  H03M13/27 ,  H03M13/29 ,  H03M13/45 ,  H04L1/00 ,  H04L1/20

Abstract: PROBLEM TO BE SOLVED: To use information related with a discontinuous transmission state by detecting a defective frame when a window error is beyond a defective frame threshold, and changing the defective frame threshold based on whether a receiver is in a continuous transmission mode or a discontinuous transmission mode. SOLUTION: A defective frame threshold is set in a defective frame detector 318 (shown by a figure with a graph in the detector 318). The threshold is varied according to the judgment of whether or not a transceiver is in a discontinuous transmission (DTX) mode. In the case of the discontinuous transmission state, the rate of the defective frame to be reported as a satisfactory frame to be transmitted to a voice decoder can be reduced. A defective frame index is generated in the diagonal line part of the graph in the detector 318. A lenient threshold in the non-discontinuous transmission mode is set so as to be 37. A rigid threshold in the discontinuous transmission mode is set so as to be 65. When the sum (Σlj) of lj is smaller than 100, the frame is detected as a defective frame.

公开(公告)号：GB2345830A

公开(公告)日：2000-07-19

申请号：GB9926071

申请日：1999-11-03

Applicant: MOTOROLA INC

Inventor： VINGGAARD NIELS ,  BATRA ASHISH ,  ROBERTSON BRETT ,  CLASSON BRIAN KEITH

IPC: G06F11/10 ,  H03M13/13 ,  H03M13/27 ,  H03M13/29 ,  H03M13/45 ,  H04L1/00 ,  H04L1/20

Abstract: A receiver (200) capable of operating in a discontinuous transmit mode includes a soft decision decode (210) producing a soft output and generating window error signals. A window error detector (214) is coupled to the soft decision decoder for detecting a bad frame when the window error exceeds a bad frame threshold, wherein the threshold is altered based on the discontinuous transmit mode. The soft decision decoder may be a turbo decoder which stops iterative processing of the data associated with a window when the window error detector detects that the window does not result in a bad frame indication.

公开(公告)号：DE19954256A1

公开(公告)日：2000-05-31

申请号：DE19954256

申请日：1999-11-11

Applicant: MOTOROLA INC

Inventor： VINGGAARD NIELS ,  BATRA ASHISH ,  ROBERTSON BRETT ,  CLASSON BRIAN KEITH

IPC: G06F11/10 ,  H03M13/13 ,  H03M13/27 ,  H03M13/29 ,  H03M13/45 ,  H04L1/00 ,  H04L1/20 ,  H04L12/24

Abstract: The arrangement has a soft decision decoder (210) that produces a soft output and window error signals and a detector (214) coupled to the decoder to detect a bad frame if a window error exceeds a threshold for a bad frame that can be altered based on whether the receiver is in continuous or discontinuous mode.

公开(公告)号：DE19954256B4

公开(公告)日：2006-01-05

申请号：DE19954256

申请日：1999-11-11

Applicant: MOTOROLA INC

Inventor： VINGGAARD NIELS ,  BATRA ASHISH ,  ROBERTSON BRETT ,  CLASSON BRIAN KEITH

IPC: G06F11/10 ,  H03M13/13 ,  H03M13/27 ,  H03M13/29 ,  H03M13/45 ,  H04L1/00 ,  H04L1/20 ,  H04L12/26

Abstract: A window error detector for a receiver capable of operating in a discontinuous transmit mode includes a soft decision decoder (210) producing soft output and generating window error signals. A detector (214) is coupled to the soft decision decoder for detecting a bad frame when the window error exceeds a bad frame threshold, wherein the threshold is altered based on the discontinuous transmit state. A turbo decoder (210) for a receiver includes a soft decision decoder and a window error detector (214) coupled to the soft decision decoder. The window error detector generates a bad frame indication. The turbo decoder stops iterative processing of the data associated with a window when the window error detector detects that the window does not result in a bad frame indication.

公开(公告)号：GB2345830B

公开(公告)日：2001-01-31

申请号：GB9926071

申请日：1999-11-03

Applicant: MOTOROLA INC

Inventor： VINGGAARD NIELS ,  BATRA ASHISH ,  ROBERTSON BRETT ,  CLASSON BRIAN KEITH

IPC: G06F11/10 ,  H03M13/13 ,  H03M13/27 ,  H03M13/29 ,  H03M13/45 ,  H04L1/00 ,  H04L1/20

Abstract: A window error detector for a receiver capable of operating in a discontinuous transmit mode includes a soft decision decoder (210) producing soft output and generating window error signals. A detector (214) is coupled to the soft decision decoder for detecting a bad frame when the window error exceeds a bad frame threshold, wherein the threshold is altered based on the discontinuous transmit state. A turbo decoder (210) for a receiver includes a soft decision decoder and a window error detector (214) coupled to the soft decision decoder. The window error detector generates a bad frame indication. The turbo decoder stops iterative processing of the data associated with a window when the window error detector detects that the window does not result in a bad frame indication.