| We are doing a lot of educational effort. See the following tutorials and
study Digital Signal Processing!! |
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| (1) How to see spectrums and filter signals
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- A tutorial by using DSPLinks.
- How to handle FFT and filters.
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| (2) How to reduce ham noises
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- See how the frequency of the noise is.
- What kind of filter to use.
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| (3) Variety of IIR Filters and their characteristics
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- Butterworth, Chebychev and Inverse Chebychev type.
- See the difference of these three.
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| (4) Variety of FIR Filters and their characteristics |
- Window Function and Remez Algorithm.
- See how to set parameters.
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| (5) Let's design Envelope Detector!! |
- How to see the trend of data.
- How to handle data in a text file.
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| (6) Execute FFT on FIR's Impulse Response |
- FIR filter's impulse response, spectrum and frequency response.
- See how they are related.
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| (7) Execute FFT on IIR's Impulse Response |
- IIR filter's impulse response, spectrum and frequency response.
- How to transfer IIR filters to FIR.
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| (8) Variety of Window Function and their merits/demerits |
- See some type of Windows Functions.
- See proper use of each function.
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| (9) Moving Average on Stock Chart (Part1) |
- See how M.A. acts.
- See how to make it.
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| (10) Moving Average on Stock Chart (Part2) |
- How to analyze a chart by FFT.
- How a digital filter changes the spectrum.
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| (11) The Basis of Down Sampling |
- What to do before decimation.
- How the spectrum changes.
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| (12) The Basis of Over Sampling |
- Interpolator to increase FS.
- Remove unnecessary frequencies.
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| (13) Can you hear the Effect of Phase Shift?? |
- An experiment of the phase shift.
- How does it sound like??
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| (14) Let's design AM Modulator |
- Use a multiplier for AM modulation.
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| (15) Let's design AM Demodulator (1) |
- The way to take absolute value to demodulate.
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| (16) Let's design AM Demodulator (2) |
- The way to use a multiplier to demodulate.
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| (17) Try to quantize a signal |
- See how SNR changes by quantization.
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| (18) Try to quantize coefficients |
- See how characteristics changes by quantization.
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| (19) Quantization on Over Sampling |
- Relationship between quantized signal and coefficients.
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| (20) Dynamic execution of filters by using Line In/Out |
- Real-Time filtering through PC's sound card.
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| (21) Dynamic AM demodulation by Line IN/OUT |
- Real-Time demodulation through PC's sound card.
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(22) How to quantize coeffs that has low cutoff  |
- Increasing bits to quantize coefficients boots up the resolution higher.
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| (23) How to quantize coefficients which exceed 1.0 |
- Decrease the resolution to quantize coefficients in this case.
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| (24) There are two type of expression for IIR filters |
- Be careful of polarity of b1 and b2
- Many beginners make mistakes at this point
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| (25) How to implement IIR filter into dsPIC |
- Use DSPLinks to generate coefficients
- You need to switch some coefficients
- And need to change some polarities
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| (26) How to implement FIR filter into dsPIC |
- Use DSPLinks to generate and quantize coefficients.
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| e-mail: info@digitalfilter.com |
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