# Jay

Last seen: 6 days ago Active since 2023

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How do I know how the output of FIR filter were calculated (e.g., each of summands of the FIR)?
For a given set of FIR coefficient b and input data input, I generate FIR output using filter function (e.g., output = filter(b,...

3 months ago | 0 answers | 0

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Question

CIC compensation filter design
I have a CIC filter as below: Decimation factor: 20 Differential Delay: 1 Number of sections: 4 I created cicDecim object by...

5 months ago | 0 answers | 0

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Question

How to do a Biquad (SOS) filtering
I have the following filters which I want to implement with cascade of multiple second-order sections (SOS). %% Filter_1 h = ...

5 months ago | 1 answer | 0

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Question

convert decimal to hex with 3 digit
I just realized that converting -30 to hexadecial by dec2hex(-30) is different from its converting back by hex2dec('E2'). Any su...

6 months ago | 1 answer | 0

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Question

The location of decimated sample in CIC Decimator?
In a CIC Decimator, which sample is chosen among others? For example, here is the original input. input = [x1 x2 x3 x4 x5 x6 x7...

6 months ago | 0 answers | 0

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The first CIC Decimator output is always zero
It seems that the first CIC Decimator output is always zero and I don't understand its behavior. I generated the input data and...

6 months ago | 0 answers | 0

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Question

CIC decimation output is strange (Output word length and negative fractional length)
I'm implementing fixed point CIC decimation filter with following requirements -- Decimation factor: 20 Number of CIC stages: ...

6 months ago | 1 answer | 0

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Question

Magnitude response of allpass filter - group-delay equalization of an IIR filter
In iirgrpdelay help page, the following example was provided for a group delay equalization of an IIR filter: [be,ae] = ellip(4...

7 months ago | 1 answer | 0

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Question

Converting 4th order IIR filter to SOS (second-order sections)
I've designed 4th order allpass IIR filter using 'iirgrpdelay' and have the numerator and denominator which are 1-by-5 vectors. ...

7 months ago | 1 answer | 0

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CPFSK demodulator performance in MATLAB example with enabling modulation index
This is self-answering - I found the reason why the error rates are strange other than "modulation index" of 0.5. CPFSKDemodulat...

8 months ago | 0

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Question

CPFSK demodulator performance in MATLAB example with enabling modulation index
I've been checking CPFSK performance against various modulation indices and SNR. MATLAB has nice examples in comm.CPFSKModulat...

8 months ago | 1 answer | 0

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Question

Number of filter taps in Gaussian filter design
Hello, I'm desinging a pulse shaping filter where the filter covers a span of 5 inputs symbols and 12 times of input symbol r...

9 months ago | 1 answer | 0