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% CORR_alter: Lag profiles for decoded alternating code experiments

% GUISDAP v.1.60 96-05-27 Copyright Asko Huuskonen and Markku Lehtinen

%

% CORR_alter defines lag profiles for decoded alternating code experiments. 

% The function calls COR_alter and hides parameters like the result memory addresses and 

% virtual channel numbers from the user.

%

% input parameters  

% N_gates : Number of gates to be specified

% gating  : Number of crossed products added to the same result memory location

% lags    : lag values for the profiles in us

% Nbits   : Number of bits in the alternating code

% bitsep  : distance of leading edges of code bauds (optional).

%           If not specified, the value will be equal to the bit length

%           This must be specified for e.g. interlaced alternating codes

%

% See also: design, COR_alter

%

% function CORR_alter(N_gates,gating,lags,Nbits,bitsep)

  function CORR_alter(N_gates,gating,lags,Nbits,bitsep)



global ra_next vc_number type_next code_next vc_env p_dtau



ri=length(lags);

vc=vc_number;

lptype=type_next;

if nargin==4, bitsep=length(wnz(vc_env,vc))*p_dtau/Nbits; end

N_skipped=0;

code=code_next;

if all(rem(lags,bitsep)==0) % & gating>1

  ra=ra_next+(0:(length(lags)-1));

  COR_alter(ra,ri,vc,lptype,gating,N_gates,Nbits,bitsep,lags,N_skipped,code)

elseif gating==1 % any(rem(lags,bitsep)~=0) & gating==1

  ra=ra_next;

  COR_fraclp(ra,vc,lptype,N_gates,Nbits,bitsep,lags,code)

else

  fprintf(' No correlator definition routine for fractional lags with gating exists\n')

end