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fft

seeni vasan
Intellectual 580 points

hai mark

    this is in regard to the fft hardware acclerator  i obtain samples from the adc and i ferform the fft for the data for 64 samples and i obtain the spectral output after doing this i must want to measure the spectral power density i like to apply the fir low pass filter of 15khz and i dont know how to obtain the the filter coeficients for that filter to convolve help me in regarding to obtain the coeficent  using matlab or any other method

with regards

seeni

 

  • 0
    Intellectual 525 points

    Hi,

    I am also working on a similar topic. but I am stuck in the middle.

    I was able to compute 1024-point FFT of an input signal. Following are the values stored in the memory as an output from the FFT computation. I need a help to interpret these values. Memory Locations and the corresponding Values stored in them are shown below:

    Memory ::::0x2000---0x2001---0x2002---0x2003---0x2004---0x2005---0x2006---0x2007

    Values:::::::0x0021---0x0021---0x0017---0xFFED---0x0002---0x0001---0x0008---0xFFFA

    Could u brief me how to identify the real and the imaginary part ???

    FFT output of the signal from Matlab and C5515 should match right?