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On binary cyclic codes of odd lengths from 101 to 127

机译:关于奇数长度从101到127的二进制循环码

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摘要

All binary cyclic codes of odd lengths are checked from 101 to 127 to find codes which are better than those in a table by T. Verhoeff (1989). There are five such cases, namely, (117, 36, 32), (117, 37, 29), (117, 42, 26), (117, 49, 24), and (127, 36 35) cyclic codes. According to Verhoeff's table the previously known ranges of the highest minimum-distance were 28-40, 28-40, 25-37, 22-32, and 32-46, respectively. Applying constructions X and Y1, (120, 37, 32) and (108, 28, 32) codes were found. Moreover, the highest minimum-distances that cyclic codes of length 127 can attain are determined.
机译:T. Verhoeff(1989)检查了所有奇数长度的二进制循环码(从101到127),找到比表中更好的码。有五种这样的情况,即(117、36、32),(117、37、29),(117、42、26),(117、49、24)和(127、36 35)循环码。根据Verhoeff的表,以前已知的最大最小距离范围分别为28-40、28-40、25-37、22-32和32-46。找到适用的结构X和Y1,(120、37、32)和(108、28、32)代码。此外,确定长度为127的循环码可以达到的最大最小距离。

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