Constructor Of A Class Of Concatenated Codes

This paper mainly deals with a special construction of concatenated codes. In bibliography[1] B.-Z.shen gives a Justesen construction of Binary concatenated codes, where outer codes are the codes constructed from generalized Hermite curves. In this correspondence, we construct a p-ary concatenated codes by using a class of algebraic-geometric codes from Hermite curves as outer codes. And the inner codes are special codes. In this way, out concatenated codes can asymptotically meet the Zyablov bound for rates lower than 0.30. In the end, we give the graph which can show the codes' asymptotical capability.