% % for info is equivalent to : % noverlap = Overlap*nfft; % spectnum = fix((samples-noverlap)/(nfft-noverlap)); % Number of windows % main loop fft_spectrum = 0; fori=1:spectnum start = (i-1)*offset; sw = signal((1+start):(start+nfft)).*window; ...
block_end apply window function to block (e.g. Hamming) apply FFT to windowed block calculate magnitude spectrum (20 * log10( re*re + im*im )) store spectrum in output array at index i block_start += N_FFT / 2 ;; NB: 50% overlap i++ end Share Follow edited Jan 25, 2016 ...
I calculate the magnitude of the three axis first, then calculate the spectrogram. I need to take the spectrogram output and save it as one column in an array to use it as an input for a deep learning model. This is my code: dataset = np.loadtxt("trainingdatasetMAG.txt", delimiter="...
The new syntaxes let you calculate the effective earth radius using the average radius of curvature method. Import Custom Antenna Patterns You can now import custom antenna patterns expressed in phi-theta coordinates into the phased.CustomAntennaElement System object. Previously, you could import ...
The simplest way to calculate the ma(i) and ar(i) coefficients for the required filter shape is to use a math program like Octave. Octave has a "signal" extension package that can be loaded by typing the command pkg load si...
In Figure 12, we now reduce the RBW in the same span 3 orders of magnitude to 10 kHz RBW. While the noise power across the span remains constant (now -65.37 dBm), the noise floor across the 1 GHz span is now down at -115 dBm for a 30 dB improvement to the noise floor. Another...
To calculate best-case accuracy, divide the maximum INL error by 2N, where N is the number of bits. In our example, allowing 0.075% error (or 11 bits) for the ADC leaves 0.025% error for the remainder of the circuitry, which will include errors from the sensor, the associated front-...
By convention the sum of the first ten harmonics are used to calculate THD (so, “total” = 10). There are other types of distortion such as intermodulation distortion (IMD) that happens when two different signals are distorted to create non-harmonic terms but those ar...
3 How to build a DC push-pull voltage amplifier with transistors? 1 Where did the base get the current from? 2 Drawbacks of Class A push pull audio power amplifier? 2 How can I calculate the base current required for my multistage connected PNP transistor to obt...
The L3 cache runs at 2.66 GHz, so it's the same order of magnitude. My guess is that memory is indeed the bottleneck. To speed this up, I've attempted the following: Compile with g++ -O3. (Well, I'd been doing this from the beginning.) Parallelizing over 4 cores using OpenMP ...