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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 21 threads in our archives.

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## filtering random processes 0

alex65111 - 2010-01-16 18:22:00
Let's assume on an input of the passband filter there is a complex white noise. As on known spectral density on an input it is possible to calculate noise level on an output of the passband filter?...

## statistica and signal processing 0

alex65111 - 2009-08-27 18:23:00
Hi! In drdc.gc.ca/PDFS/unc06/p518839.pdf the left-hand side of expression 6 displays to the right side. Can someone explain in more detail the logical and mathematical nature of changes occurring i...

## frequency respons of halfband filter? 0

alex65111 - 2009-04-15 17:31:00
Let the halfband filter is defined H=[0.033402 0 -0.015082 0 0.018968 0 -0.024143 0 0.031336 0 -0.042322 0 0.061361 0 -0.10468 0 0.31784 0.5 0.31784 0 -0.10468 0 0.061361 0 -0.042322 0 0.031336 0 ...

## Error in "manual" inverse DFT 0

alex65111 - 2009-03-22 08:06:00
Why do not coincide mfT and sall?, where in a code an error? clear all t=0:(1024-1); f=0.4; A=2.5; fi=pi/4; s0=A*exp(sqrt(-1)*2*pi*f*t+fi); s=[zeros(1, 100) s0 zeros(1,250)]; s=s+(0.5*randn...

## prewhitening? 0

alex65111 - 2009-03-15 06:15:00
"...the optimal detector consists of prewhitening the observation before applying a matched filter..." What is "prewhitening"? When the given procedure should be applied? ...

## Re: group delay time? 0

alex65111 - 2009-02-05 15:47:00
> On Feb 5, 3:08=A0am, "alex65111" wrote: > > It is known, that non-uniformity of the frequency response of the channel > > influences level of ISI. And what kind of distortions is characteris...

## frequency response of cic 0

alex65111 - 2008-07-20 05:26:00
Not clearly, why instead of four petals one is drawn only R = 8; % Decimation factor M = 1; % Differential delay N = 9; % Number of stages f=0:0.001:0.5; fcic=(abs(sin(pi*M*f)./(eps+sin(pi*f/...

## Parameters of mfilt.cicdecim? 0

alex65111 - 2008-07-11 16:47:00
y=mfilt.cicdecim (R, M, N, IWL, OWL, [50 29 24 24 24 24 24 24 24 24]) Is not clear, the physical sense of M - Differential delay and [50 29 24 24 24 24 24 24 24 24] ? By what criterion gets o...

## diversity and beamforming 0

alex65111 - 2008-03-23 07:33:00
Spatial diversity and beamforming solves one problem or each method solves strictly own problem? In what these methods are similar among themselves and than differ? ...

## Problem in Jakes_filter... 0

alex65111 - 2008-02-01 17:51:00
In " Principles of Communication Systems Simulation with Wireless Applications " it is resulted program builds up a two-tap TDL model and computes the output for the two inpput signal of interest (c14...
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