txrxfilter.m

QAM 数字通信系统模拟 眼图绘制

function h = TxRxFilter();
% h = TxRxFilter();
%
% This function returns the coefficients of a root raised
% cosine filter design using the function firrcos() by
% the call
%
%    h = sqrt(N)*firrcos(10*N,1/N,.5,2,'rolloff','sqrt');
%
% and can therefore replace the above line by the call
%
%    h = TxRxFilter;
%
% S. Weiss, University of Southampton, 11/11/2001

h= [-1.6076256877968796e-04
   3.1249751090591860e-04
   7.6982663655026740e-04
   1.1698400427774009e-03
   1.4740851570987559e-03
   1.6505417949437945e-03
   1.6767551739643551e-03
   1.5423156446087527e-03
   1.2504393279959784e-03
   8.1846673168941349e-04
   2.7717778495940778e-04
  -3.3108421033765489e-04
  -9.5538760627885821e-04
  -1.5400970668113907e-03
  -2.0293917671726559e-03
  -2.3720724655523222e-03
  -2.5262689379665932e-03
  -2.4636450650104120e-03
  -2.1727170410214308e-03
  -1.6609510134174962e-03
  -9.5538760627885474e-04
  -1.0164733326190361e-04
   8.3870433713928558e-04
   1.7923195692921589e-03
   2.6795128457056728e-03
   3.4206211131538877e-03
   3.9428138037414092e-03
   4.1868194958166417e-03
   4.1130068369398792e-03
   3.7062712997578350e-03
   2.9792378561013305e-03
   1.9733908270164035e-03
   7.5788068138997531e-04
  -5.7407507518493722e-04
  -1.9110947312867819e-03
  -3.1315471496790159e-03
  -4.1130068369398809e-03
  -4.7426217283227969e-03
  -4.9276474441362151e-03
  -4.6053315681658900e-03
  -3.7513179839879364e-03
  -2.3857889609996625e-03
  -5.7667172561458638e-04
   1.5605975852504980e-03
   3.8670450730334698e-03
   6.1479073731302136e-03
   8.1839287618361862e-03
   9.7457065596325866e-03
   1.0610329539459690e-02
   1.0579335622415219e-02
   9.4968504040153206e-03
   7.2666714349786821e-03
   3.8670450730334646e-03
  -6.3805142019163848e-04
  -6.0921601090516073e-03
  -1.2244934671025680e-02
  -1.8756589919939719e-02
  -2.5208378862105578e-02
  -3.1118892823300430e-02
  -3.5965598835432280e-02
  -3.9210665178826855e-02
  -4.0329805133209835e-02
  -3.8842613096201052e-02
  -3.4342695324051382e-02
  -2.6525823848649217e-02
  -1.5214374929550249e-02
  -3.7645438706689191e-04
   1.7861643903560907e-02
   3.9210665178826869e-02
   6.3221917685246334e-02
   8.9299246977819116e-02
   1.1671913413227106e-01
   1.4465811740813758e-01
   1.7222629823929103e-01
   1.9850531655952308e-01
   2.2258889141887420e-01
   2.4362383960110817e-01
   2.6084942019021656e-01
   2.7363291223645603e-01
   2.8149951370692189e-01
   2.8415494309189537e-01
   2.8149951370692189e-01
   2.7363291223645603e-01
   2.6084942019021656e-01
   2.4362383960110817e-01
   2.2258889141887420e-01
   1.9850531655952308e-01
   1.7222629823929103e-01
   1.4465811740813758e-01
   1.1671913413227106e-01
   8.9299246977819116e-02
   6.3221917685246334e-02
   3.9210665178826869e-02
   1.7861643903560907e-02
  -3.7645438706689191e-04
  -1.5214374929550249e-02
  -2.6525823848649217e-02
  -3.4342695324051382e-02
  -3.8842613096201052e-02
  -4.0329805133209835e-02
  -3.9210665178826855e-02
  -3.5965598835432280e-02
  -3.1118892823300430e-02
  -2.5208378862105578e-02
  -1.8756589919939719e-02
  -1.2244934671025680e-02
  -6.0921601090516073e-03
  -6.3805142019163848e-04
   3.8670450730334646e-03
   7.2666714349786821e-03
   9.4968504040153206e-03
   1.0579335622415219e-02
   1.0610329539459690e-02
   9.7457065596325866e-03
   8.1839287618361862e-03
   6.1479073731302136e-03
   3.8670450730334698e-03
   1.5605975852504980e-03
  -5.7667172561458638e-04
  -2.3857889609996625e-03
  -3.7513179839879364e-03
  -4.6053315681658900e-03
  -4.9276474441362151e-03
  -4.7426217283227969e-03
  -4.1130068369398809e-03
  -3.1315471496790159e-03
  -1.9110947312867819e-03
  -5.7407507518493722e-04
   7.5788068138997531e-04
   1.9733908270164035e-03
   2.9792378561013305e-03
   3.7062712997578350e-03
   4.1130068369398792e-03
   4.1868194958166417e-03
   3.9428138037414092e-03
   3.4206211131538877e-03
   2.6795128457056728e-03
   1.7923195692921589e-03
   8.3870433713928558e-04
  -1.0164733326190361e-04
  -9.5538760627885474e-04
  -1.6609510134174962e-03
  -2.1727170410214308e-03
  -2.4636450650104120e-03
  -2.5262689379665932e-03
  -2.3720724655523222e-03
  -2.0293917671726559e-03
  -1.5400970668113907e-03
  -9.5538760627885821e-04
  -3.3108421033765489e-04
   2.7717778495940778e-04
   8.1846673168941349e-04
   1.2504393279959784e-03
   1.5423156446087527e-03
   1.6767551739643551e-03
   1.6505417949437945e-03
   1.4740851570987559e-03
   1.1698400427774009e-03
   7.6982663655026740e-04
   3.1249751090591860e-04
  -1.6076256877968796e-04];