Title:
【発明の名称】スロット付きモードのデコーダの状態距離の初期化
Document Type and Number:
Japanese Patent JP2003529999
Kind Code:
A
Abstract:
A method and apparatus for improving the performance of a convolutional encoder used in a slotted mode communication system. In a typical slotted mode communication system a stream of continuously convolutionally encoded symbols is transmitted by a base station. A remote unit, comprising a convolutional decoder to decode the stream of symbols periodically transits between active and inactive states. While in the inactive state the remote unit misses a portion of the continuous stream of symbols. Following the interruption of the stream of symbols, the state metrics of a trellis within the decoder are initialized. Initialization of the state metrics may be such that the decoding process will be biased towards only valid states and away from invalid states. In addition, the initialization may be such that there is not a bias towards any particular state within the trellis.
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Inventors:
Newfeld, Arthur James
Bailey, Gwain
Bailey, Gwain
Application Number:
JP2001573643A
Publication Date:
October 07, 2003
Filing Date:
March 30, 2001
Export Citation:
Assignee:
QUALCOMM INCORPORATED
International Classes:
H03M13/23; H03M13/25; H03M13/41; H04L1/00; (IPC1-7): H04L1/00; H03M13/23; H03M13/25; H03M13/41
Attorney, Agent or Firm:
Takehiko Suzue (3 outside)