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Comp.dsp is a worldwide Usenet news group that is used to discuss various aspects of digital signal processing.
There are 16908 threads in our archives.
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fft of a rand vector [6 articles]
Haohe - 2012-02-23 10:35:00
Hello, I am convolving a vector, lets say A with a random vector say B1,
B1=randn(1000,1) in Matlab: conv(A,B1).
Then, I re-run it with B2=randn(1000,1)and conv(A,B2) but unfortunately the
new outpu...
2D FFTW3 vs. MATLAB difference only near center place [4 articles]
hyun.ha - 2012-02-23 01:51:00
Dear friends,
Here I have a problem to re-produce same results with MATLAB and FFTW
during 2 dimensional FFT.
I'm trying to do FFT with Gaussian convolution which coordinates varies
from negativ...OT Manned reentry [17 articles]
Jerry Avins - 2012-02-23 00:33:00
I just saw an interview with John Glenn, one of the space pioneers, on
PBS. He was the first American to orbit Earth and reenter (and later a
US Senator.) It awakened a memory probably worth shari...QPSK demodulation using dsp [3 articles]
pgdragone - 2012-02-22 16:11:00
To demodulate QPSK requires a carrier recovery circuit.Without a recovered
and properly phased carrier it is not possible to demodulate the I and Q
channels.
In the analog world there are circuits ...Timing recovery [6 articles]
nutnut - 2012-02-22 10:36:00
Hi everybody,
I am designing an FSK coherent demodulator. I have some trouble on timing
recovery. The question is:
-If I use a timing error detector that works with N samples/symbol (e.g.
Gardner ...Echo cancellation to share radio channel [20 articles]
Fender123 - 2012-02-22 03:55:00
Reading up a 1988 edition of Lee & Messerschmitt's "Digital Communication",
I came across this gem (Ch18 pg 643):
"In principle, echo cancellation could be used to share any medium, such as
a radio...ali [2 articles]
Umair Ahmed - 2012-02-21 20:21:00
http://sharecash.org/download.php?file=2652910
...Can You Top This [52 articles]
brent - 2012-02-21 18:10:00
In a game of "can you top this".....
I worked at a small factory where they made condenser capacitors for
cars. Worst job of my life. I welded a bracket to the can thousands
of times/day. The ...FFT bins do not match with frequency response [7 articles]
Marc2050 - 2012-02-21 14:59:00
Hi.
I am expecting to get a frequency response at 19.3 Hz from a signal
source.
For reason that I wont go into details here, I've a resolution of FFT at
0.25 Hz. So, if I were to correctly get the...Complex signals and numerical computing [6 articles]
Mac Decman - 2012-02-21 00:57:00
This is going to be kind of an odd post. I am trying to replace my
measurement system. Currently I produce a gliding tone exponential
sweep with an IF following:
Fstart + Fstart*(exp( (n./N)*log(...