等重碼的約翰遜界和格雷厄姆界的幾點(diǎn)注記
SOME NOTES ON JOHNSON BOUND AND GRAHAM BOUND OF CONSTANT WEIGHT CODES
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摘要: 本文給出了四類達(dá)到約翰遜上界的等重碼和兩類超過格雷厄姆下界的等重碼。
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關(guān)鍵詞:
Abstract: Four classes of constant weight codes which can meet the Johnson upper bound and two classes of constant weight codes which are greater than the Graham lower bound are given in this paper. -
S.M. Johnson, IRE Trans. on-IT, IT-18 (1962),203.[2]R. L. Graham, IEEE Trans. on-IT, IT-26(1980),37.[3]胡正明,通信學(xué)報(bào),1985年,第2期,第44頁.[4]M. Hall Jr., Combinatorial Theory, Blaisdell, Waltham, Mass, p. 141, pp. 232-233. -
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