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<div data-externalstyle="false" dir="ltr" style="font-family: 'Calibri', 'Segoe UI', 'Meiryo', 'Microsoft YaHei UI', 'Microsoft JhengHei UI', 'Malgun Gothic', 'sans-serif';font-size:12pt;"><div>Dear colleagues,</div><div><br></div><div>I have two functions f1(x) and f2(x). Using the following formula: </div><div><img tabindex="-1" style="max-height: 640px; max-width: 640px;" src="cid:Image948.png@145dd24ffa63b5"><br></div><div data-signatureblock="true"><div>to calculate the results, get: 5.125[units]. </div><div>I tried to calculate separately by F1=fft(f1) , F2=fft(f2) and then multiply stems one by one and adding the results. I found two problems:</div><div>1 - I have been used Hamming window to minimize noise. The amplitude of each signal changes and the final results too;</div><div>2 - When I change the number of samples, the results change too.</div><div>None the results in 1 or 2 are igual or close to 5.125 (this is right).</div><div>What am I doing wrong?</div><div>Can someone help me? </div><div>Thanks a lot.<br></div><div>_______<br>Eng. André Luiz Regis Monteiro, M.Sc<br><a href="mailto:andre.regis13@gmail.com">andre.regis13@gmail.com</a><br><br><br>Enviado do Email do Windows</div><div><br></div></div></div>
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