CS2108 T3

When interpreting a discretized signal in the frequency domain:

• Softness matters

• We cannot know the frequency step without knowing the sampling frequency

• We choose instead to convert to time domain because it makes more sense

• The values must be real numbers

frequency step = sampling frequency / N. What's N?

• Fundamental period

• Index of the time step

• Length of the vector

• Newtons

If our time domain signal is symmetrical, then:

• Our frequency domain signal is continuous

• Our sound lacks any sine components

• Our frequency domain signal is asymmetrical

• Our frequency domain signal is periodic

Which of this is least relevant to convolution?

• ifft

• Multiply and sum

• Flip the impulse response

• fftshift

Which of the following is true about MATLAB?

• MATLAB's conv performs linear convolution

• MATLAB's conv performs circular convolution

• Doing conv on 2 length 5 vectors gives a length 5 result

• Doing conv on different length vectors will throw an error