| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and device for detecting the first position of a code series capable of fast detecting the first position of a code series with a simple processing configuration and also decoding the code series on the basis of the detected first position, a decoding method using the first position detecting method and its device. SOLUTION: A cyclic code series of a code length (n) is inputted, cyclic code series of a code length (n) are sequentially inputted for first position detection for detecting the first position of the cyclic code series, a multiplier (g), register (r) and an adder + generate a syndrome for code words from a first code start position Ci-1 (i=1, 2,...) of the inputted cyclic code series to a first code end position Ci-1+n in the register (r), a weighting multiplier (w) and the adder + next correct the generated syndrome by using data based on a code word to be stored an n-bit buffer and starting from a second code start position Ci+n , and an NOR detects the first position of the cyclic code series of the code length (n) on the basis of the corrected syndrome. |
