Software Radio

Started by Anonymous in comp.dsp2 months ago 3 replies

https://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

Started by Anonymous in comp.dsp3 months ago 24 replies

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...

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

Started by Richard (Rick) Lyons in comp.dsp3 months ago 6 replies

Hi. 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?

Started by Piotr Mancini in comp.dsp3 months ago 1 reply

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...

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?

Started by fl in comp.dsp3 months ago 4 replies

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...

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?

Started by Mehtap özkan in comp.dsp4 months ago 1 reply

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...

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

Started by Anonymous in comp.dsp4 months ago 1 reply

I 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?

Started by Peter Mairhofer in comp.dsp4 months ago 4 replies

Hi 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

Started by Randy Yates in comp.dsp4 months ago 34 replies

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...

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...


[FAR Off Topic] Backup email providder - Help please

Started by Richard Owlett in comp.dsp4 months ago 9 replies

I am of opinion that "free" can "cost too much". My email provider is having 'problems'. I've dealt with them for decades - they were my ISP in...

I am of opinion that "free" can "cost too much". My email provider is having 'problems'. I've dealt with them for decades - they were my ISP in dial-up days. Their solar system headquarters is less than 5 miles from my home in rural SW Missouri. I just did not realize how much I would miss email. Are there any ethical free email providers. TIA


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