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1.发明授权Sequential decoder and system for error correction on burst noise channels by sequential decoding 失效通过顺序解码对BURST噪声通道进行错误校正的顺序解码器和系统
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2.发明公开Sequential decoder and system for error correction on burst noise channels by sequential decoding 失效顺序解码器和系统用于纠错上通过顺序解码突发差错信道。
公开(公告)号：EP0024020A1
公开(公告)日：1981-02-18
申请号：EP80104528.7
申请日：1980-07-31
CPC分类号： H04L1/0054
摘要： sequential decoder (32) for error correction on burst and random noise channels using convolutionally encoded data interacts with a de-interleaver (30) which time- demultiplexes data from a data channel. The decoder includes a memory (44) for storing a table of likelihood values which are derived from known error statistics about the data channel. The decoder removes (38F) an encoded subblock of data from the de-interleaver and enters it into a replica (38E) of the convolutional encoder which calculates a syndrome bit from a combination of the presently received subblock together with a given number of previous subblocks. For each received bit, an Indicator bit is calculated (40) which is a function of the difference between the current path in a convolutional decoding tree and the received sequence. The sequential decoder employs the syndrome bit (38A) together with burst indicator bits (40E) to calculate (42) a table address in a table (44) of likelihood values and error pattern values.
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