algoritm Forney for rs(15_13)

RS(204,188)译码器说明 原文件： rs_decoder.v（顶层文件）, SyndromeCalc.v（计算伴随式）, BM_KES.v（BM求解关键方程）, Forney.v（Forney算法求误差样值）, CheinSearch.v（搜索错误位置）,ff_mul.v（有限域乘法）。 ROM及初始化文件： rom_inv.v（求逆运算）, rom_power.v（求幂运算）； rom_inv.mif（ROM初始化文件）, rom_po

Concatenated coding schemes were first proposed by Forney [1] as a method for achieving large coding gains by combining two or more relatively simple buildingblock or component codes(sometimes called constituent codes). The resulting codes had the