GPS码捕获，跟踪代码算法的仿真

代码说明：

  GPS码捕获，跟踪代码算法的仿真，这是基于GPS的仿真推导(GPS code acquisition, tracking algorithm simulation code, which is derived based on GPS simulation)

文件列表：

Trackdemo
.........\acqu.m,1571,2011-02-20
.........\acqu1.m,1721,2005-12-13
.........\acquiresignal.m,973,2005-12-13
.........\Acquiresion.fig,3153342,2011-03-20
.........\AWGN.m,314,2005-06-30
.........\CAcode.m,601,2005-10-27
.........\CarrierLoopFilter.m,236,2011-02-19
.........\codegen.m,882,2005-05-31
.........\CodeLoopFilter.m,305,2011-02-19
.........\CreateSource.m,1015,2005-12-15
.........\CreateSource1.m,1305,2005-11-30
.........\demotrace.m,11965,2011-02-13
.........\demotrack.m,9452,2011-02-15
.........\framecheck2.m,1500,2005-12-14
.........\Modulate.m,378,2005-10-27
.........\sourcegenerate.m,1190,2005-12-12
.........\tracksignal.asv,12517,2011-02-20
.........\tracksignal.m,12532,2011-02-20