?? compute_partial_product.m
字號:
coef=[-524 459 -236 9 -20 41 -76 133 -221 354 -545 815 -1190 1705 -2420 3437 -4978 7614 -13457 41569 41569 -13457 7614 -4978 3437 -2420 1705 -1190 815 -545 354 -221 133 -76 41 -20 9 -236 459 -524];
NUM_TAP = 20;
% Input bit width is 18 (divided into 3 slices feeding separate M4K blocks
ADD_BIT = 6;
% Create address line inputs for MSB and LSB array
for i=1:2^ADD_BIT
LSB_add(i) = i-1;
if ((i-1)>=32)
MSB_add(i) = LSB_add(i) - 2^ADD_BIT;
else
MSB_add(i) = i-1;
end
end
pp_coef = zeros(2^ADD_BIT, 2, NUM_TAP);
for i=1:NUM_TAP
for j=1:2^ADD_BIT
pp_coef(j,1,i) = coef(i) * MSB_add(j);
pp_coef(j,2,i) = coef(i) * LSB_add(j);
end
end
pp_coef_tdm = zeros(32, 8, NUM_TAP/2);
% Reformat partiatl products to store as hex
index = 1;
for i=1:NUM_TAP/2
for j=1:32
for k=1:8
if (index > 2^ADD_BIT)
index = 1;
end
if (j<=8)
pp_coef_tdm(j, k, i) = pp_coef(index, 1, i);
elseif (j>8 && j<=16)
pp_coef_tdm(j, k, i) = pp_coef(index, 1, i+(NUM_TAP/2));
elseif (j>16 && j<=24)
pp_coef_tdm(j, k, i) = pp_coef(index, 2, i);
else
pp_coef_tdm(j, k, i) = pp_coef(index, 2, i+(NUM_TAP/2));
end
index=index+1;
end
end
end
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