function [ref_c ref_p ref_a] = getRefGain(ofdm_params, spec_occ, s)

k0 = ofdm_params.k0;
x = ofdm_params.x;
y = ofdm_params.y;

s = mod(s, ofdm_params.nspf);

k = k0 + x*mod(s, y) + x*y*(spec_occ.kmin:1:spec_occ.kmax);
k(find(k > spec_occ.kmax)) = [];
k(find(k < spec_occ.kmin)) = [];

n = mod(s, y);
m = floor(s/y);
p = (k - k0 - n*x)/(x*y);

mag = sqrt(2);
ref_a = mag*ones(1,length(k));
ref_c = k;

for b=spec_occ.boost
    ref_a(find(ref_c == b)) = 2*mag;
end

switch ofdm_params.mode

    case 'A'
	ref_p = mod(4*ofdm_params.Z(n+1,m+1) + p*ofdm_params.W(n+1,m+1) + p.*p*(1+s)*ofdm_params.Q, 1024);

	case 'B'
	ref_p = mod(4*ofdm_params.Z(n+1,m+1) + p*ofdm_params.W(n+1,m+1) + p.*p*(1+s)*ofdm_params.Q, 1024);

    case 'C'
	ref_p = mod(4*ofdm_params.Z(n+1,m+1) + p*ofdm_params.W(n+1,m+1) + p.*p*(1+s)*ofdm_params.Q, 1024);
	
	case 'D'
	ref_p = mod(4*ofdm_params.Z(n+1,m+1) + p*ofdm_params.W(n+1,m+1) + p.*p*(1+s)*ofdm_params.Q, 1024);
	
	case 'E'
	ref_c = [];
	ref_p = [];
	ref_a = [];
    error ('Implement Mode E!');
    
end;