公开(公告)号：AU2003265834A1

公开(公告)日：2004-03-19

申请号：AU2003265834

申请日：2003-08-28

Applicant: MOTOROLA INC

Inventor： BATTIN ROBERT D ,  HARRIS JOHN M ,  BROWN TYLER A ,  PROCTOR LEE M

IPC: H04L1/00 ,  H04W28/04 ,  H04W36/18 ,  H04W52/12 ,  H04W52/40

Abstract: The present invention addresses the need for a device and method of frame reconstruction among soft handoff legs that improves the reliability of received information without reducing RF capacity. Given received frames from each leg of a soft handoff (300-303) a reconstructed frame (304) is produced. Subframes (e.g., 362) with passing inner frame quality indicators (352) are selected for the reconstructed frame. For portions of the reconstructed frame (e.g., 324 and 344) that do not have corresponding portions in the leg frames with passing inner frame quality indicators, a bit-wise majority rule is applied to select values.

公开(公告)号：CA2247429C

公开(公告)日：2002-01-01

申请号：CA2247429

申请日：1997-11-04

Applicant: MOTOROLA INC

Inventor： ASHLEY JAMES P ,  PROCTOR LEE M

IPC: H04M1/60 ,  H04B3/23 ,  H04M9/08 ,  H04B3/20

Abstract: An improved non-linear processor used in echo cancellation eliminates a comfort noise source (214) and instead inputs a control signal (224) directl y into a noise suppression system (403). The noise suppression system (403) us es the control signal (224) to inhibit the iterative update of the background noise estimate when the control signal (224) is active, which prevents any residual echo from biasing the noise estimate provided by the noise suppression system (403). Additionally, the control signal (224) is used by a gain calculator (533) within the noise suppression system (403) to attenuate each frequency band to the maximum allowable amount plus the current residua l channel signal-to-noise ratio (SNR). Depending on the implementation, the noise suppression system (403) models the background noise of either a user of the PSTN or a user of a mobile station.

公开(公告)号：CA2147497A1

公开(公告)日：1995-03-23

申请号：CA2147497

申请日：1994-07-19

Applicant: MOTOROLA INC

Inventor： WOOD SANDRA L ,  KUNDMANN THOMAS J ,  PROCTOR LEE M ,  STEWART KEN

IPC: H03M13/00 ,  H04B14/04 ,  H04J3/00 ,  H04J3/14 ,  H04L1/00 ,  H04L1/20 ,  H04Q7/22

Abstract: A communication system implements detection of bad frames of information by utilizing multiple bit correction thresholds. Equipment used within the communication system adapts to different signaling environments by dynamically altering the bit correction threshold based on a history of the number of consecutive bad frames of information that have been previously erased and the number of bits corrected by a channel decoder (202). By implementing this dynamic bit correction threshold, sufficent bad frame indication (BFI) detection and receiver sensitivity can be obtained simultaneously, which results in an improved perceived audio quality to the end user.