gusucode.com > 现代通信系统——使用MATLAB(+全部程序) > 现代通信系统——使用MATLAB(+全部程序)/现代通信系统——使用MATLAB(+全部程序)/Matlab 程序/Chapter8/P_e_sd_a.m
function [p_err,gamma_db]=p_e_sd_a(gamma_db_l,gamma_db_h,k,n,d_min) % p_e_sd_a.m Matlab function for computing error probability in % soft-decision decoding of a linear block code % when antipodal signaling is used. % [p_err,gamma_db]=p_e_sd_a(gamma_db_l,gamma_db_h,k,n,d_min) % gamma_db_l=lower E_b/N_0 % gamma_db_h=higher E_b/N_0 % k=number of information bits in the code % n=code block length % d_min=minimum distance of the code gamma_db=[gamma_db_l:(gamma_db_h-gamma_db_l)/20:gamma_db_h]; gamma_b=10.^(gamma_db/10); R_c=k/n; p_err=(2^k-1).*q(sqrt(2.*d_min.*R_c.*gamma_b));