afc_init.m

这是AFC(自适应频率控制)程序

% Project Name:	AFC
% FILE NAME :	AFC_init.m
% ABSTRUCT:	This file is for AFC init.


%DC filtering
AFC_DC_ALPHA     =          0.01;
ONE_MINUS_AFC_DC_ALPHA  =   1-AFC_DC_ALPHA;
afc_dc_n_1       =          0;

%Ex estimation
AFC_EX_ALPHA     =          0.03125;    %1/32
ONE_MINUS_AFC_EX_ALPHA  =   1-AFC_EX_ALPHA;
afc_Ex_n_1       =          0.1/4;

%IIR
afc_gain         =          0.5;
afc_b0           =          0.38;
AFC_R            =          0.9;
AFC_A2           =          -AFC_R*AFC_R;
afc_a1           =          0;
afc_iir_yn_2     =          0;
afc_iir_yn_1     =          0;

%Pole adaptation
afc_delta        =          0.2/256;
AFC_MSCALE       =          0.82;
AFC_P_ALPHA      =          0.82/9;

%Ey estimation
AFC_EY_ALPHA     =          0.125; 
ONE_MINUS_AFC_EY_ALPHA  =   1-AFC_EY_ALPHA;
afc_Ey_n_1       =          0.1;

%Gain adaptation
gain_index       =          33;         %middle of table

%Timer and gain adjust
AFC_THB_ALPHA    =          0.27*2; 
AFC_THB_BETA     =          2/(5.5*5.5);
AFC_THG          =          (2.^(9/31))/2;
afc_timer        =          0;
afc_k_1          =          4/50;
afc_k_2          =          1/50;
AFC_DETECT_BIT   =          0;
detected_sample  =          0;