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Natalie Johnson
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DSP Guide .com has the highly rated textbook for digital signal processing.
Chapter 30 pg 561 on Complex Numbers
http://www.dspguide.com/ch30.htm (chapters are free to download)
Hes talking about representing sinusoids with a complex number.
Author states "Multiplying complex numbers A and B, results in another complex number". "Multiplying two sinusoids does not produce another sinusoid. Complex multiplication fails to match the physical system".
But then the following page 562
"When a sinusoid passes through a linear system, the complex numbers representing the input signal and the system are multiplied, producing the complex number representing the output".
Which is contrary to what he stated? The final complex number does actually give a sinusoid after multiplication, so matches the physical system...
What am I missing here?
Chapter 30 pg 561 on Complex Numbers
http://www.dspguide.com/ch30.htm (chapters are free to download)
Hes talking about representing sinusoids with a complex number.
Author states "Multiplying complex numbers A and B, results in another complex number". "Multiplying two sinusoids does not produce another sinusoid. Complex multiplication fails to match the physical system".
But then the following page 562
"When a sinusoid passes through a linear system, the complex numbers representing the input signal and the system are multiplied, producing the complex number representing the output".
Which is contrary to what he stated? The final complex number does actually give a sinusoid after multiplication, so matches the physical system...
What am I missing here?
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