silas/imdd_silas
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

WDM update : demux changes for memory optimizaion

Browse Source
This commit is contained in:
Silas Oettinghaus
2025-09-17 17:17:03 +02:00
parent cbc0ceff0a
commit 2c0e7a81aa
2 changed files with 35 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
Classes/02_optical/Optical_Demultiplex.m
View File

@@ -113,8 +113,35 @@ classdef Optical_Demultiplex < handle
pha = mod(-2*pi*(0:blocklen_in-1).'.*df_T/obj.fs_in, 2*pi);
lo = cos(pha)+1i*sin(pha);
x_envelopes = ifft(fft(att.*signal_in(:,1).*lo).*H);
y_envelopes = ifft(fft(att.*signal_in(:,2).*lo).*H);
% x_envelopes = ifft(fft(att.*signal_in(:,1).*lo).*H);
% y_envelopes = ifft(fft(att.*signal_in(:,2).*lo).*H);
N = size(lo,1);
C = size(lo,2);
x_envelopes = zeros(N, C, 'like', signal_in);
y_envelopes = zeros(N, C, 'like', signal_in);
s1 = signal_in(:,1);
s2 = signal_in(:,2);
% Reusable work buffers (avoid reallocations)
wrk_time = zeros(N,1, 'like', signal_in);
wrk_freq = zeros(N,1, 'like', signal_in);
for c = 1:C
% ---- X branch ----
wrk_time(:) = att .* s1 .* lo(:,c); % N×1
wrk_freq(:) = fft(wrk_time); % N×1
wrk_freq(:) = wrk_freq .* H; % N×1
x_envelopes(:,c) = ifft(wrk_freq); % N×1
% ---- Y branch ----
wrk_time(:) = att .* s2 .* lo(:,c);
wrk_freq(:) = fft(wrk_time);
wrk_freq(:) = wrk_freq .* H;
y_envelopes(:,c) = ifft(wrk_freq);
end
end
end