## Forums More comp.dsp

## Multiple Sample Rates

inI have a Kalman filter which estimates pitch and roll for a stabilised platform. It is a steady-state kalman filter so no great computational...

I have a Kalman filter which estimates pitch and roll for a stabilised platform. It is a steady-state kalman filter so no great computational overload - I calculate the gain matrix first and then go into the while loop forever. In the loop there is also controllers Lag lead PI type. To get a high bandwidth I sample at 10kHz overall but I am finding that the Kalman filter doesn't nee

## Software Radio

inhttps://www.gearbest.com/cables-connectors/pp_009457309206.html?wid=1433363 can't believe they are off the shelf now and so small.

https://www.gearbest.com/cables-connectors/pp_009457309206.html?wid=1433363 can't believe they are off the shelf now and so small.

## DSP programming in Atari days

inHello! I'm new to DSP and programming, so I wonder how you guys did DSP programming in Atari days back in 80's. How did you figure out to do...

Hello! I'm new to DSP and programming, so I wonder how you guys did DSP programming in Atari days back in 80's. How did you figure out to do it? I guess education flow is something like that: 1) Learn Assembly language; 2) Get and learn Atari or IBM PC technical reference manuals; 3) Read some DSP books; 4) Start programming simple batch programs; Am I right? Can you please sug...

## Accessing very old comp.dsp posts

inHi. Is there a way I can access posts made on comp.dsp during March of 2008? Thanks. [-Rick-]

Hi. Is there a way I can access posts made on comp.dsp during March of 2008? Thanks. [-Rick-]

## How to build a virtual acoustic studio hosted in a website?

inThis is a long term question. We are in the process of building an Internet website that will allow the users to experiment, learn and ask...

This is a long term question. We are in the process of building an Internet website that will allow the users to experiment, learn and ask questions about distances, angles, trajectories, ballistics and sounds related to a very specific event. This is the website where we plan to host the simulations, data, etc. Free Open Source 3D Model of Dealey Plaza http://dealey-plaza.org/ That...

## What is the phase margin for a PLL of critically damped?

inHello, all: I read an online PLL tutorial, which says "the design of critically damped loops, a PM of about 70 degrees, does not lead to the...

Hello, all: I read an online PLL tutorial, which says "the design of critically damped loops, a PM of about 70 degrees, does not lead to the fastest settling time for third order CP PLLs." It is known that a critically damped second order loop has zeta=1, i.e. two real roots of the same value. But I can't get its phase margin 70 degrees. What do you think about phase margin remark? ...

## All-digital symbol timing recovery scheme constraints?

inDear All, In page 8 of http://www.cs.tut.fi/kurssit/TLT-5806/Synch.pdf it is stated: All-digital symbol timing recovery scheme requires...

Dear All, In page 8 of http://www.cs.tut.fi/kurssit/TLT-5806/Synch.pdf it is stated: All-digital symbol timing recovery scheme requires higher-than-symbol-rate sampling. If this statement is correct what should be the minimum ratio? We have also a constraint on the max sampling rate of the ADC. It is 2.2x symbol rate. If we sample at 2.2x symbol rate should we also adjust the Matched filter...

## 1d correlation / convolution

inI have the absolute amplitude of a digital signal that I want to auto correlate with self , also cross correlate with a different digital...

I have the absolute amplitude of a digital signal that I want to auto correlate with self , also cross correlate with a different digital signal [ absolute magnitude ] . I'm using a complex 1d fft to implement this . I only have the absolute values of the spectra to work with ; where the absolute value is defined as : square root of (Real^2 + Imaginary^2). After multiplying the a...

## Averaging of phase noise?

inHi all, My most basic question can be summarized as: "Can phase noise be averaged out?" And subsequentially, is there a difference if the...

Hi all, My most basic question can be summarized as: "Can phase noise be averaged out?" And subsequentially, is there a difference if the input signal is a sinusoid or wideband? What happens after averaging infinitely many times? My first reaction is: No, it can't (at least not in a similar manner as white noise where SNR is increased by 10dB for every additional 10x of averaging) becau...

## frequency measurement and time-frequency uncertainty

inWe have a requirement to measure a 32.768 KHz TTL output quickly and with a certain accuracy. If one used an N-bit ADC sampling at F samples...

We have a requirement to measure a 32.768 KHz TTL output quickly and with a certain accuracy. If one used an N-bit ADC sampling at F samples per second, what is the relationship between T_m and F_delta, where T_m is the minimum measurement time (say, in seconds) for a maximum frequency error of F_delta (say, in PPM)? For this discussion assume the frequency is stable over the measureme...

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