Estimating transfer function with real poles, complex zeros

Started by Peter Mairhofer in comp.dsp48 minutes ago

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.dsp1 day 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...


Stability in PID Controllers

Started by Randy Yates in comp.dsp4 days ago 18 replies

I know next-to-nothing about this topic, but the following question has popped into my mind several times. It seems like folks generally (and...

I know next-to-nothing about this topic, but the following question has popped into my mind several times. It seems like folks generally (and perhaps this is totally wrong) design PID controllers by basically selecting what they think are "good" constants for the proportional, integral, and derivative terms. That is, they just sorta play with their systems and tweak the terms until it seem...


Geometric Algebra

Started by Anonymous in comp.dsp4 days ago 2 replies

I think this set of 6 introductory videos on geometric algebra is neat. https://youtu.be/srwoPQfWWS8?list=PLLvlxwbzkr7igd6bL7959WWE7XInCCevt

I think this set of 6 introductory videos on geometric algebra is neat. https://youtu.be/srwoPQfWWS8?list=PLLvlxwbzkr7igd6bL7959WWE7XInCCevt


Recreating Undersampled Data

Started by Rob Gaddi in comp.dsp5 days ago 31 replies

I've got a situation coming up that I'm trying to think through in advance. I'm running an ADC at let's say 1 Msps, sampling an input waveform...

I've got a situation coming up that I'm trying to think through in advance. I'm running an ADC at let's say 1 Msps, sampling an input waveform that is known to be a triangle wave at roughly 2 1/16 MHz. So with every ADC sample I advance across the input waveform by about 22.5 degrees, having missed a bit along the way. And I acquire that data and now I'm looking at it offline, and I'd...


How to downsample this signal?

Started by Piotr Wyderski in comp.dsp1 week ago 30 replies

Hello, I have the 50Hz mains voltage signal sampled at 12bit/100kHz. This high frequency is for rapid detection of overvoltage conditions....

Hello, I have the 50Hz mains voltage signal sampled at 12bit/100kHz. This high frequency is for rapid detection of overvoltage conditions. However, for further processing this sample rate is way too high, so I'd like to change the sampling rate by a factor ~100 (not a very critical value, just "sensibly low"). The thing will be implemented on a PSOC5LP, which has a dedicated digital fi...


Need resources to implement WIFI on USRP devices.

Started by Anonymous in comp.dsp1 week ago

Hi, Iam Eshwar. I realized 16qam,DSSS, FH based radios on USRP.Now i want to implement complete wifi on usrp. I need some resources on...

Hi, Iam Eshwar. I realized 16qam,DSSS, FH based radios on USRP.Now i want to implement complete wifi on usrp. I need some resources on standards (frame formats,modulation schemes,channel coding ..etc). I went through 802.11g standards.Iam confused on where to start with. Requirement : I will use USRP with laptop_1(connected to internet) on oneside and other side i will use...


So DC motors are obsolete!

Started by Anonymous in comp.dsp1 week ago 9 replies

Talked to a motor manufacturer in Germany. They don't even do DC motors any more, no call for them at all. Just ac and brushless DC which is...

Talked to a motor manufacturer in Germany. They don't even do DC motors any more, no call for them at all. Just ac and brushless DC which is really ac under a different name. Apparently with a good ac controller you can get an induction motor to have the same torque as a DC motor and you get max torque at zero speed - all down to flux vectoring. So do we throw out our brushed motors


Matlab code needed for SSB demodulation

Started by Rick Lyons in comp.dsp2 weeks ago 72 replies

Hi Guys, I'm trying to help someone understand the operation of a discrete single-sideband (SSB) demodulation system that is being...

Hi Guys, I'm trying to help someone understand the operation of a discrete single-sideband (SSB) demodulation system that is being proposed to replace an older analog SSB demodulation system. Having not thought about SSB systems for many years, I've been trying to figure out how the "phasing method" of SSB demodulation works. In trying to model this "phasing method" using Matla...


Good references on ultrasound beamforming and imaging

Started by Anonymous in comp.dsp2 weeks ago 2 replies

Hi everyone I hope this is the right group since I'm interested in the signal processing aspect mote than the physics itself. I'm trying to...

Hi everyone I hope this is the right group since I'm interested in the signal processing aspect mote than the physics itself. I'm trying to look for good references (either books or papers) that go over some ultrasound imaging and beamforming algorithms. Basically, things like delay and sum, dynamic focusing, adaptive beamforming, etc. Hopefully, it would also include ultrasound ima


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