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MSP430FR5994: The connection between the storage of complex numbers and the Q15 format in the FFT case

Part Number: MSP430FR5994

Hi Team,

In the case of using real number FFT, several problems were encountered
1. The FFT result in the case should be a complex number. How is this complex number stored in memory? Is the real part stored at one address and the imaginary part stored at the next address? Is it stored in this order?
2. In the case, there is a function that finds the conjugate of a complex number, and then a complex multiplication function is used. When a complex number is multiplied by its own conjugate, the imaginary part should be 0. Why is it -1 after I use it? What is the reason?

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Thanks & Regards

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