vhdl coding for fft application

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revathivenkat

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Hi,i am in need of vhdl code to perfom multiplication of complex numbers for fft in vhdl.....help me in this regard...
 

i know to do multiplication of ordinary numbers in vhdl.....but no knowledge about how to represent or do operations in complex numbers(real,imaginary parts)...
 

you can store them however you want. They are two different numbers at the end of the day.
 

VHDL has no predefined (synthesizable) complex data types. You have to define the representation (rectangular or polar) and the operations.
You do a complex rectangular multiplication like this:

(a+jb) * (c+jd) = ac-bd + j(ad+bc)
 
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