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    • 4. 发明授权
    • Circuit for checking bit errors in a received BCH code succession by the
use of primitive and non-primitive polynomials
    • 通过使用原始和非原始多项式来检查接收的BCH码序列中的比特错误的电路
    • US4502141A
    • 1985-02-26
    • US415873
    • 1982-09-08
    • Takakuni Kuki
    • Takakuni Kuki
    • H03M13/00H03M13/15G06F11/10
    • H03M13/15
    • For use in deciding whether a single or a t-tuple error (t being greater than unity) is present in each bit sequence given as a primitive BCH code in accordance with a generator polynomial comprising a primitive and a non-primitive polynomial, an error checking circuit comprises first and second dividers (16, 17) for dividing each bit sequence by the primitive and the non-primitive polynomials to provide first and second signals, respectively. If the bit sequence includes only a single error, the first signal represents one of non-zero residues which result by the division when such single errors are present at the respective bit locations of the sequence. A memory (18) is preliminarily loaded with reference numbers corresponding to the respective non-zero residues and produces one of the reference numbers in response to the first signal only in the presence of a single error. A comparator (19) compares the produced reference number with a residue represented by the second signal to carry out the decision. Preferably, the memory is loaded also with the single error bit locations to locate the single error in a bit sequence being checked. The circuit may be a microcomputer operable in the above-described manner.
    • 为了用于根据包括原始和非原始多项式的生成多项式来确定作为原始BCH码给出的每个比特序列中是否存在单个或一个t元组错误(t大于一个),错误 检查电路包括第一和第二分频器(16,17),用于将每个比特序列除以原语和非原始多项式,以分别提供第一和第二信号。 如果比特序列仅包括单个错误,则当在序列的相应比特位置存在这样的单个错误时,第一个信号表示通过除法产生的非零残基之一。 存储器(18)预先加载与各个非零残差相对应的附图标记,并且仅在存在单一误差的情况下响应于第一信号而产生一个附图标记。 比较器(19)将产生的参考数与由第二信号表示的残差进行比较,以执行该决定。 优选地,存储器也加载有单个错误位位置,以在正在检查的位序列中定位单个错误。 电路可以是以上述方式可操作的微型计算机。