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Philip Masters


Last seen: 8 months ago Active since 2019

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How come the Bit Error Rate for my Vitrebi soft decoder always returns as 0.5 for all values of SNR?
So this is my code in which I'm trying to get the BER for soft decision Vitrebi decoding using BPSK modulation in an AWGN chann...

1 year ago | 0 answers | 0

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Answered
How come the Vitrebi Decoder only accepts positive integers when soft decoding?
I should've used 'unquant' not 'soft' please ignore :)

1 year ago | 0

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Question


How come the Vitrebi Decoder only accepts positive integers when soft decoding?
I have some convolutionally encoded data that was then modulated by BPSK. I then added some noise to it so the values are now th...

1 year ago | 1 answer | 0

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Question


Is there a way I can plot on top of the output spectrogram from using the 'stft' function?
I know you can use 'uistack' but I'm having trouble assigning the STFT to a variable as for 'uistack' you need something like: ...

1 year ago | 0 answers | 0

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Is there a way I can combine multiple spectrogram subplots (or multiple channel spectrograms) into just one spectrogram?
I have multiple chirp signals each with different frequencies e.g. the first chirp goes from 0 to 100 Hz, second from 50 to 200 ...

1 year ago | 0 answers | 0

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How can I ensure that the Magnitude changes within one segment when performing a Short Time Fourier Transform and observing the plot?
So I'm ideally looking for a spectrogram such as this: In this spectrogram the frequency and power value of these frequencies...

1 year ago | 0 answers | 0

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Trouble understanding why the spectrum of my signal is at maximum power all frequencies
So I'm playing around with spectrograms and I'm trying to output a spectrogram where frequency actually changes with time so I'v...

1 year ago | 0 answers | 0

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When using the 'set_param' function, how do I ensure that I format the parameter value properly when the parameter value is a 1xn array?
I'm trying to simulate a simple Doppler Radar and I need to change the frequency offset value per simulation, however this requi...

1 year ago | 1 answer | 0

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Question


Simulink RF Blockset: How do I specify the frequencies (ωRF + ωLO) for a mixer within the configuration tab?
So I'm building a little project with the end goal of simulating and displaying the result of a simple radar. This is it so far...

2 years ago | 0 answers | 0

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I can't seem to connect my voltage source (and hopefully for the same reason the rest) to the rest of my circuit but this to me looks the same as MATLAB's Colpitt's Oscillator? TechnicalQuestion
So my circuit is on the left, and MATLAB's Colpitt's Oscillator is on the right. I'm currently using a DC Voltage Source and...

2 years ago | 1 answer | 0

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Question


On Simulink, is it possible to add outputs to a vector at the end of each step?
So I've been using MATLAB's RF Mixer: https://imgur.com/1buqXZc However, I've changed the RF output from Quadrature and In-Phas...

2 years ago | 0 answers | 0

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Question


The Output of my scope doesn't change regardless of the initial values in the initialization function under model properties
I've been playing around with MATLAB's RF Mixer Example: https://www.mathworks.com/help/simrf/gs/model-an-rf-mixer.html In the...

2 years ago | 1 answer | 0

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Question


How can I detect notes using a spectrogram?
I'm building a program to detect the notes from an audio file that contains 5 chords, each containing 3/4 notes. This is my code...

3 years ago | 1 answer | 1

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