參數(shù)資料
型號: AN2407
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述: Reed Solomon Encoder/Decoder on the StarCore SC140/SC1400 Cores, With Extended Examples
中文描述: 里德所羅門編碼器/的StarCore SC140/SC1400核心解碼器,以擴展實例
文件頁數(shù): 21/48頁
文件大小: 306K
代理商: AN2407
References
Reed Solomon Encoder/Decoder on the StarCore SC140/SC1400 Cores, With Extended Examples, Rev. 1
Freescale Semiconductor
21
for (mu=0; mu<2*T; mu++)
{
/* assume sigma[mu] = sigma[mu-1] */
for (i=0; i<=l_mu[mu]; i++)
{
sigma[mu+1][i] = sigma[mu][i];
}
l_mu[mu+1] = l_mu[mu];
mu_l_mu[mu+1] = mu+1 - l_mu[mu+1];
if (d[mu] != 0)
{
/* if discrepancy is not zero, correct sigma[mu] */
x_power = bin_2_exp[d[mu]];
y_power = bin_2_exp[inv];
power = MIN((x_power + y_power),2*N+1);
factor = exp_2_bin_extended[power];
for (i=0; i<=l_mu[p]; i++)
{
x_power = bin_2_exp[factor];
y_power = bin_2_exp[sigma[p][i]];
power = MIN((x_power + y_power),2*N+1);
sigma[mu+1][mu - p +i] ^= exp_2_bin_extended[power];
}
shift = l_mu[p]+ mu-p;
l_mu[mu+1] = MAX(l_mu[mu],shift);
mu_l_mu[mu+1] = mu+1 - l_mu[mu+1];
/* update p */
if (mu_l_mu[mu] >= max_p_lp)
{
p = mu;
max_p_lp = mu_l_mu[mu];
power = N - bin_2_exp[d[p]];
inv = exp_2_bin_extended[power];
}
}
/* calculate d[mu+1] */
sum = s[(mu+2)-1];
for (i=1; i<=l_mu[mu+1]; i++)
{
x_power = bin_2_exp[sigma[mu+1][i]];
y_power = bin_2_exp[s[(mu+2-i)-1]];
power = MIN((x_power + y_power),2*N+1);
sum ^= exp_2_bin_extended[power];
}
d[mu+1] = sum;
}
for (i=0; i<2*T; i++)
{
error_loc_poly[i] = bin_2_exp[sigma[2*T][i]];
}
}
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