dc_var6_str.h

快速傅立叶变换程序代码,学信号的同学,可要注意了

  char afile[100] ; /* file with alist in it. <->    */
  int reada ;       /* whether to use default name; 2 = user-defined. <1>    */
  int noisy ;       /* whether a noisy y vector is involved <0>    */
  double rate ;     /* rate achieved by this MN system <0>    */
  double Rate ;     /* rate achieved by this G system <0>    */
  double capacity ; /* capacity of equivalent channel <0>    */
  double rho ;      /* effective value of rho <0>    */
  double h2fs ;     /* binary entropy of source <0>    */
  double h2fn ;     /* binary entropy of noise <0>    */
  int notabovecap ; /* whether not to allow communication attempts above capacity. If 1, then such attempts are disallowed. <1>    */
  int use_fe ;      /* use fe_min           <0>    */
  int fe ;          /* whether to use femin? <0>    */
  int use_bnd ;     /* use bnd              <1>    */
  int error_log ;   /* whether to record decoding errors <0>    */
  char error_logfile[100] ;/* file for errors      <->    */
  int noise_sum ;   /* whether to tot up noise patterns that cause decoding errors <0>    */
  char noise_sumfile[100] ;/* file for noisesums   <->    */
  int maxcount ;    /* max number of bit errors to report; -1=all <5>    */
  int skip ;        /* number of random vectors to generate before starting <0>    */
  int MNC ;         /* which code to use: 1,2,3,4 = MNC 1-4 if MNC = 0 then an M*N code as in MacKay 1995 is defined. Only mnc=4 supported by mnc6 <4>    */
  int N ;           /* length of the unknown original vector s <20>   */
  int M ;           /* length of the transmitted vector t if not N <0>    */
  int trueM ;       /* actual number of constraints satisfied <0>    */
  int trueN ;       /* actual number of transmitted bits (see CYCLICU) <0>    */
  int nsfrom ;      /* whether index of first state bit is 1(1) or N-ns (0) <1>    */
  int gc ;          /* Use Gaussian channel <1>    */
  double gcx ;      /* Signal to noise ratio of gaussian channel <1.0>  */
  double fs ;       /* fraction in s        <0.5>  */
  double fn ;       /* error probability on channel <0.05> */
  int ns ;          /* if !0, number of signal bits (state bits) in constant weight <0>    */
  int nn ;          /* if !0, number of noise bits in constant weight <0>    */
  int nsn ;         /* if !0, number of signal+noise bits in constant weight <0>    */
  double fgcx ;     /* fix signal to noise ratio exactly to this by normalizing the noise <1.0>  */
  double fgcnf ;    /* fixed gaussian channel noise factor (factor by which to scale the noise) <1.0>  */
  int NN ;          /* Actual number of transmitted bits (Tue 11/6/02)UGLY! <0>    */
  double gcxact ;   /* actual Signal to noise ratio of gaussian channel this time <1.0>  */
  int fgc ;         /* fix fix signal to noise ratio exactly by normalizing the noise <0>    */
  double true_fs ;  /* actual fraction in s <0>    */
  double true_fn ;  /* actual error fraction on channel <0>    */
  int tr ;          /* typical number in row and column of code <8>    */
  double fte ;      /* ?                    <0>    */
  int tc ;          /* number per column (useful for automated production of afile name) <4>    */
  int verbose ;     /* verbosity            <0>    */
  long int mseed ;  /* seed for matrices in the code <1234> */
  long int vseed ;  /* seed for vectors     <9876> */
  int message ;     /* which message we are on <0>    */
  int MESSAGE ;     /* how many messages to send <1>    */
  int DEMO ;        /* -                    <0>    */
  int failcount ;   /* number of failed messages <0>    */
  int lowweight ;   /* definition of a low weight error <100>  */
  int totloops ;    /* tot number of loops done in successful transmissions <0>    */
  int blocks ;      /* number of blocks transmitted <0>    */
  int block_valid ; /* number of blocks reaching valid decoding <0>    */
  int block_det ;   /* number of detected failures <0>    */
  int block_undet ; /* number of undetected failures <0>    */
  int block_detlw ; /* number of detected in which error is low weight <0>    */
  int bit_errs ;    /* number of bit errs   <0>    */
  int bit_undet ;   /* number of bits in undetected errs <0>    */
  int bit_det ;     /* number of bits in detected errs <0>    */
  double bep ;      /* block error probability <0>    */
  double bep_u ;    /* block error probability <0>    */
  double bep_l ;    /* block error probability <0>    */
  double bitep ;    /* block error probability <0>    */
  double bitep_u ;  /* block error probability <0>    */
  double bitep_l ;  /* block error probability <0>    */
  double bep_det ;  /* block error probability <0>    */
  double bep_detlw ;/* block error probability <0>    */
  double bep_undet ;/* block error probability <0>    */
  double ebno ;     /* eb/no                <1.0>  */
  double zscore ;   /* number of sd's to use in error bars <1.0>  */
  int failures ;    /* number of failed messages to stop after <5>    */
  int pheading_count ;/* -                    <-1>   */
  int pheading_period ;/* -                    <20>   */
  int big_write_period ;/* how often to write a ton of summary stuff <100>  */
  int coset ;       /* whether to decode a second coset code (gallagerS02 only) <0>    */