Associative memory for decoding

Started by Anonymous in comp.dsp7 months ago 6 replies

I started writing some PSK31 software one time and it went very well until I got to the actual symbol decoding part. I'll see if I can try again...

I started writing some PSK31 software one time and it went very well until I got to the actual symbol decoding part. I'll see if I can try again using associative memory for decoding:https://groups.google.com/forum/#!topic/artificial-general-intelligence/C-LJSnjaz2c Anyway it is very interesting from a DSP point of view, particularly getting a particular value under coherency and al


sigmaDSP and similar devices

Started by rickman in comp.dsp7 months ago 34 replies

I have been watching the sigmaDSP from ADI and the similar part from TI. These parts seem ideal for a lot of applications but the problem I...

I have been watching the sigmaDSP from ADI and the similar part from TI. These parts seem ideal for a lot of applications but the problem I have is with the tools. They don't let you write your own code. You can only string together modules from their library. They are mostly filters and similar functions and I don't see how to do a lot of very basic stuff that any other processor can do. ...


Signal mixing on a delta-sigma ADC

Started by Piotr Wyderski in comp.dsp7 months ago 2 replies

I have a delta-sigma ADC with exposed modulator input pin. Its definition is as follows: "Modulator Input is used to dynamically control the...

I have a delta-sigma ADC with exposed modulator input pin. Its definition is as follows: "Modulator Input is used to dynamically control the polarity of the signal in the modulator. Polarity is inverted when ?mi? input is high. This input signal allows the user to modulate the input signal with an independent clock to act as a signal mixer." OK, I can see what happens if the modulato


Just a test, ignore me.

Started by Eric Jacobsen in comp.dsp7 months ago

My news reader responded unfavorably to a recent software update, and I'm just trying to get it synched up again. A "new" message that it...

My news reader responded unfavorably to a recent software update, and I'm just trying to get it synched up again. A "new" message that it pulled in today was from last October.


I/Q Mixing

Started by rickman in comp.dsp7 months ago 11 replies

Why is I/Q mixing done in receivers prior to the ADC rather than using a single mixer and converting to complex from a real data stream. Is...

Why is I/Q mixing done in receivers prior to the ADC rather than using a single mixer and converting to complex from a real data stream. Is there some aspect of the signal that is lost if the signal is not down converted with an I/Q local oscillator? -- Rick C


Applications for low-latency closed-loop control

Started by Steve M in comp.dsp7 months ago 6 replies

Folks, This is a question about applications of technology rather than how to design it. An existing application includes an ADC/floating-point...

Folks, This is a question about applications of technology rather than how to design it. An existing application includes an ADC/floating-point processor/DAC controller to provide a closed-loop solution for emulating physical circuit characteristics up to say 100KHz. The closed-loop controller was required to have an effectively negligible delay (say 200ns) up to at least that frequen


Learning Complicated Integrals from a Simple Integral in mathHandbook.com

Started by Anonymous in comp.dsp7 months ago 3 replies

Learning Complicated Integrals from a Simple Integral just define one integral of f(x) is f(x) - x, it will know not only the...

Learning Complicated Integrals from a Simple Integral just define one integral of f(x) is f(x) - x, it will know not only the integral of f(x), but also f(x+1), 2*f(2*x+2), etc. IN: integrate(f(x_), x_) := f(x) - x; integrate(2*f(x+1)) OUT: 2*f(x+1) - 2*(x+1) reference math handbook www.mathHandbook.com


Fractional Calculus

Started by Anonymous in comp.dsp8 months ago 15 replies

Why do we need it? http://mathhandbook.com/

Why do we need it? http://mathhandbook.com/


Estimating transfer function with real poles, complex zeros

Started by Peter Mairhofer in comp.dsp8 months ago 9 replies

Hello, I find it pretty hard to estimate the poles and zeros of the following transfer function: https://snag.gy/LOJA3Q.jpg The raw CSV...

Hello, I find it pretty hard to estimate the poles and zeros of the following transfer function: https://snag.gy/LOJA3Q.jpg The raw CSV data is available here https://pastebin.com/ZBshB6eC (first/third column: frequency in Hz, second column: magnitude in dB, fourth col: angle in deg). It comes from a circuit simulator (ac analysis) and I want to use it with a high level simulation ...


[OT] I got a JOB!!!

Started by Tim Wescott in comp.dsp8 months ago 46 replies

Since this is a newsgroup, and this is news... Wescott Design Services is going into remission, while I pursue a day job. Job title is...

Since this is a newsgroup, and this is news... Wescott Design Services is going into remission, while I pursue a day job. Job title is Software Designer 5 at Planar Systems -- so any circuit design or control systems jones will have to be satisfied by hobby work or on the side. In the near term I'll be finishing up current work with current customers; in the longer term I'll probabl...


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