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A Quadrature Signals Tutorial: Complex, But Not Complicated

Understanding the 'Phasing Method' of Single Sideband Demodulation

Complex Digital Signal Processing in Telecommunications

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Discussion Groups > Comp.DSP


Comp.dsp is a worldwide Usenet news group that is used to discuss various aspects of digital signal processing.

There are 17460 threads in our archives.

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The threads with the newest articles are listed first.

Spectral Purity Measurement [23 articles]
0

rickman - 2014-12-21 06:03:00
I want to analyze the output of a DDS circuit and am wondering if an FFT is the best way to do this. I'm mainly concerned with the "close in" spurs that are often generated by a DDS. My analysis...Spectral Purity Measurement

FFTW3 Split r2c in place transform - what address for imaginary output
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2014-12-20 20:06:00
Hi, I need to understand the function fftw_plan_guru_split_dft_r2c(). I would l= ike to know what the "io" argument points to. The documentation doesn't see= m clear, it states that if "in" and "...FFTW3 Split r2c in place transform - what address for imaginary output

200kHz to 30MHz phase detection stratergies. [8 articles]
0

2014-12-19 21:21:00
hey guys, I am currently dealing with sinusoidal signals ranging between 200k and 30M= Hz and have to measure a phase difference of a few millidegrees between the= two signals. I have read up on...200kHz to 30MHz phase detection stratergies.

Anti-Doppler [4 articles]
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Max - 2014-12-18 19:06:00
The 'Doppler' thread got me wondering: How would you undo doppler effects to a signal without generating too many inaccuracies. The pitch shift is gradual, so there's no way to simply precompute so...Anti-Doppler

Holomorphing: 2D-image processing as 1D complex DSP!
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2014-12-17 20:57:00
One word, alone says it all "Holomorphic functions". Here, it's just simple= polynomial "curve"-fitting of an image verses a sample of points. It's mor= phing without all the complicated machinery ...Holomorphing: 2D-image processing as 1D complex DSP!

Repeated Spectra [41 articles]
0

2014-12-16 16:18:00
What does it mean that spectra of a sampled signal is repeated at integer multiples of sampling frequency? I am struggling to visualise it. ...Repeated Spectra

OT: Merry Christmas [6 articles]
0

Rick Lyons - 2014-12-14 21:39:00
Hi Guys, It's that time again. Here's wishin' all of you a very Merry Christmas and a Happy New Year! Of course, these good wishes are also directed at those of you who do not celebrate C...OT:  Merry Christmas

Doppler effect on Baud Rate [44 articles]
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dsp student - 2014-12-14 19:23:00
I'm having a hard time wrapping my head around doppler and how it affects a= digital communications signal's baud rate. The examples that I've seen exp= lain that the center frequency of a signal i...Doppler effect on Baud Rate

QPSK signal. [5 articles]
0

AiDa - 2014-12-11 18:09:00
Hi,guys. I research Doppler shift in QPSK signals.Methods to compensate Doppler shift I found during my research: to use a phase-locked loop (PLL) and linear decreasing frequency sweep. The quest...QPSK signal.

Question about Active Noise Cancellation [12 articles]
0

2014-12-11 09:18:00
Hello, I'm hoping the experienced folks in this newsgroup would be so kind so poin= t me to some good tutorials (and books) on the subject of active noise canc= ellation. Being new to ANC, thi...Question about Active Noise Cancellation
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