Comments for GaussianWaves

Comment on Phase demodulation via Hilbert transform: Hands-on by huachuca

huachuca — Tue, 14 Jan 2025 17:10:15 +0000

Hi,
In section 1.8 of MatLab book you mentioned one of the two requirements (equation 1.76) is that the analytic signal needs to satisfy orthogonality requirement.
My question is, If I were to create I and Q samples for a signal to be transmitted, do they also have to meet the same requirement. I also have some files with IQ samples that were transmitted over the air, received and then recorded and they are not orthogonal. Am I misunderstanding the reason of this requirement?
If I want to display the power spectrum density of these samples, do I need to simply use fft() of the given complex samples or use hilbert() of the real values to ensure orthogonality. I know either way only the one-sided spectrum will be displayed. I have included the first 10 samples of my file for convenience. Thanks.
array([ 0.40649414-0.1227417j , -0.36132812+0.25732422j,
0.26293945-0.35986328j, -0.12719727+0.40551758j,
-0.02508545-0.39770508j, 0.1739502 +0.32714844j,
-0.30200195-0.21472168j, 0.38134766+0.07275391j,
-0.40698242+0.08276367j, 0.37402344-0.22644043j], dtype=complex64)

Comment on Understanding Fourier Series by Mohamoud Ali Aden

Mohamoud Ali Aden — Sun, 07 Jul 2024 16:09:26 +0000

it’s very understandable blog post thank you for sharing. We need more

Comment on Simulate matched filter system with SRRC filtering by sadeq

sadeq — Sun, 25 Feb 2024 08:17:06 +0000

In reply to dokman.

hi, Im working on FTN. I would be happy to exchange ideas. email me
[email protected]

Comment on Wireless Communication Systems in Matlab by Mathuranathan

Mathuranathan — Sun, 26 Nov 2023 08:57:29 +0000

In reply to yeon. This is because, the sinc function given in the book is conflicting with the inbuilt sinc function from the installed Matlab packages. You could rename the sinc function (that is coded in the book) to something else (say ‘my_sinc’) and give it a try.

Comment on Wireless Communication Systems in Matlab by yeon

yeon — Sat, 25 Nov 2023 03:35:07 +0000

In matlab, 7.3 It says that sincfunction needs additional input arguments to run. What should I do?

Comment on Hamming Code : construction, encoding & decoding by Gloria

Gloria — Fri, 03 Nov 2023 14:26:46 +0000

Thanks!

Comment on Best Signal Processing Books by Iman

Iman — Sat, 26 Aug 2023 23:06:37 +0000

Thank you!
I appreciate your recommendation of the books. “Digital Signal Processing, Principles, and Applications” by Thomas Holton is also a great option for those looking for an intermediate read on the subject.

Comment on Simulate matched filter system with SRRC filtering by dokman

dokman — Mon, 31 Jul 2023 18:26:54 +0000

thank you for your work , can you help me for faster than Nyquist signaling(code MATLAB)

Comment on Complex-valued exponential sequence by SaiKrishna Saketh

SaiKrishna Saketh — Thu, 20 Jul 2023 08:58:11 +0000

Insightful article 🙂

Comment on MPSK modulation: simulate in Matlab & Python by Mathuranathan

Mathuranathan — Mon, 03 Jul 2023 12:21:57 +0000

In reply to Ann.

Hi
Shaped Offset Quadrature Phase Shift Keying, Telemetry Group version (SOQPSK-TG)code is not available. Please check the table of contents of the book.
https://www.gaussianwaves.com/digital-modulations-using-python/

Regards
Mathuranathan