gen_dpcch_code.m

用matlab程序实现WCDMA系统的仿真

function y=gen_DPCCH_code(N_pilot)
%************************************************************************
%function y=gen_DPCCH_code(N_pilot)
%
% Copyright 2002 The Mobile and Portable Radio Research Group
%
%Generates the a simplified version of the DPCCH code.  In this version,
%the pilot symbols in dach slot are generated as directed by the WDCMA 
%specification, ETSI TS 125 211 V3.2.0 (2000-02).  However, the remainder
%of the symbols are randomly generated.
%
%Parameters
%   Input
%      N_pilot   Scalar   Number of pilot symbols per slot
%                         Must be an integer between 3 and 8
%
%   Output
%      y         Vector   DPCCH code.  Contains 150 symbols
%
%************************************************************************

%Check to make sure that N_pilot is between 3 and 8
if (N_pilot<3)|(N_pilot>8)
   error(['N_pilot=',int2str(N_pilot),'!  N_pilot must be between 3 and 8']);
end

if N_pilot==3
   y(1:10)=[1 1 1 round(rand(1,7))];
   y(11:20)=[0 0 1 round(rand(1,7))];
   y(21:30)=[0 1 1 round(rand(1,7))];
   y(31:40)=[0 0 1 round(rand(1,7))];
   y(41:50)=[1 0 1 round(rand(1,7))];
   y(51:60)=[1 1 1 round(rand(1,7))];
   y(61:70)=[1 1 1 round(rand(1,7))];
   y(71:80)=[1 0 1 round(rand(1,7))];
   y(81:90)=[0 1 1 round(rand(1,7))];
   y(91:100)=[1 1 1 round(rand(1,7))];
   y(101:110)=[0 1 1 round(rand(1,7))];
   y(111:120)=[1 0 1 round(rand(1,7))];
   y(121:130)=[1 0 1 round(rand(1,7))];
   y(131:140)=[0 0 1 round(rand(1,7))];
   y(141:150)=[0 0 1 round(rand(1,7))];
elseif N_pilot==4
   y(1:10)=[1 1 1 1 round(rand(1,6))];
   y(11:20)=[1 0 0 1 round(rand(1,6))];
   y(21:30)=[1 0 1 1 round(rand(1,6))];
   y(31:40)=[1 0 0 1 round(rand(1,6))];
   y(41:50)=[1 1 0 1 round(rand(1,6))];
   y(51:60)=[1 1 1 1 round(rand(1,6))];
   y(61:70)=[1 1 1 1 round(rand(1,6))];
   y(71:80)=[1 1 0 1 round(rand(1,6))];
   y(81:90)=[1 0 1 1 round(rand(1,6))];
   y(91:100)=[1 1 1 1 round(rand(1,6))];
   y(101:110)=[1 0 1 1 round(rand(1,6))];
   y(111:120)=[1 1 0 1 round(rand(1,6))];
   y(121:130)=[1 1 0 1 round(rand(1,6))];
   y(131:140)=[1 0 0 1 round(rand(1,6))];
   y(141:150)=[1 0 0 1 round(rand(1,6))];
elseif N_pilot==5
   y(1:10)=[1 1 1 1 0 round(rand(1,5))];
   y(11:20)=[0 0 1 1 0 round(rand(1,5))];
   y(21:30)=[0 1 1 0 1 round(rand(1,5))];
   y(31:40)=[0 0 1 0 0 round(rand(1,5))];
   y(41:50)=[1 0 1 0 1 round(rand(1,5))];
   y(51:60)=[1 1 1 1 0 round(rand(1,5))];
   y(61:70)=[1 1 1 0 0 round(rand(1,5))];
   y(71:80)=[1 0 1 0 0 round(rand(1,5))];
   y(81:90)=[0 1 1 1 0 round(rand(1,5))];
   y(91:100)=[1 1 1 1 1 round(rand(1,5))];
   y(101:110)=[0 1 1 0 1 round(rand(1,5))];
   y(111:120)=[1 0 1 1 1 round(rand(1,5))];
   y(121:130)=[1 0 1 0 0 round(rand(1,5))];
   y(131:140)=[0 0 1 1 1 round(rand(1,5))];
   y(141:150)=[0 0 1 1 1 round(rand(1,5))];
elseif N_pilot==6
   y(1:10)=[1 1 1 1 1 0 round(rand(1,4))];
   y(11:20)=[1 0 0 1 1 0 round(rand(1,4))];
   y(21:30)=[1 0 1 1 0 1 round(rand(1,4))];
   y(31:40)=[1 0 0 1 0 0 round(rand(1,4))];
   y(41:50)=[1 1 0 1 0 1 round(rand(1,4))];
   y(51:60)=[1 1 1 1 1 0 round(rand(1,4))];
   y(61:70)=[1 1 1 1 0 0 round(rand(1,4))];
   y(71:80)=[1 1 0 1 0 0 round(rand(1,4))];
   y(81:90)=[1 0 1 1 1 0 round(rand(1,4))];
   y(91:100)=[1 1 1 1 1 1 round(rand(1,4))];
   y(101:110)=[1 0 1 1 0 1 round(rand(1,4))];
   y(111:120)=[1 1 0 1 1 1 round(rand(1,4))];
   y(121:130)=[1 1 0 1 0 0 round(rand(1,4))];
   y(131:140)=[1 0 0 1 1 1 round(rand(1,4))];
   y(141:150)=[1 0 0 1 1 1 round(rand(1,4))];
elseif N_pilot==7
   y(1:10)=[1 1 1 1 1 0 1 round(rand(1,3))];
   y(11:20)=[1 0 0 1 1 0 1 round(rand(1,3))];
   y(21:30)=[1 0 1 1 0 1 1 round(rand(1,3))];
   y(31:40)=[1 0 0 1 0 0 1 round(rand(1,3))];
   y(41:50)=[1 1 0 1 0 1 1 round(rand(1,3))];
   y(51:60)=[1 1 1 1 1 0 1 round(rand(1,3))];
   y(61:70)=[1 1 1 1 0 0 1 round(rand(1,3))];
   y(71:80)=[1 1 0 1 0 0 1 round(rand(1,3))];
   y(81:90)=[1 0 1 1 1 0 1 round(rand(1,3))];
   y(91:100)=[1 1 1 1 1 1 1 round(rand(1,3))];
   y(101:110)=[1 0 1 1 0 1 1 round(rand(1,3))];
   y(111:120)=[1 1 0 1 1 1 1 round(rand(1,3))];
   y(121:130)=[1 1 0 1 0 0 1 round(rand(1,3))];
   y(131:140)=[1 0 0 1 1 1 1 round(rand(1,3))];
   y(141:150)=[1 0 0 1 1 1 1 round(rand(1,3))];
elseif N_pilot==8
   y(1:10)=[1 1 1 1 1 1 1 0  round(rand(1,2))];
   y(11:20)=[1 0 1 0 1 1 1 0 round(rand(1,2))];
   y(21:30)=[1 0 1 1 1 0 1 1 round(rand(1,2))];
   y(31:40)=[1 0 1 0 1 0 1 0 round(rand(1,2))];
   y(41:50)=[1 1 1 0 1 0 1 1 round(rand(1,2))];
   y(51:60)=[1 1 1 1 1 1 1 0  round(rand(1,2))];
   y(61:70)=[1 1 1 1 1 0 1 0 round(rand(1,2))];
   y(71:80)=[1 1 1 0 1 0 1 0 round(rand(1,2))];
   y(81:90)=[1 0 1 1 1 1 1 0 round(rand(1,2))];
   y(91:100)=[1 1 1 1 1 1 1 1 round(rand(1,2))];
   y(101:110)=[1 0 1 1 1 0 1 1 round(rand(1,2))];
   y(111:120)=[1 1 1 0 1 1 1 1 round(rand(1,2))];
   y(121:130)=[1 1 1 0 1 0 1 0 round(rand(1,2))];
   y(131:140)=[1 0 1 0 1 1 1 1 round(rand(1,2))];
   y(141:150)=[1 0 1 0 1 1 1 1 round(rand(1,2))];
end

y=-2*y+1;