Sign in
Search compdsp
Ads
Discussion Groups
See Also
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 23 threads in our archives.
You are looking at page 1 of 3.
The threads with the newest articles are listed first.
Re: log likelihood ratio
Piyush Kaul - 2009-07-18 08:29:00
"obscurely name devices" !!! Not really.. Belief progation decoder is
a term mostly used for iterative decoders e.g. Turbo decoders. Log
Likelihood ratio is not a device, it is simply the log of the...
Re: Construct noise signal with a particular SNR
Piyush Kaul - 2008-11-18 00:47:00
Theoritically no. The mean is part of signal energy. SNR has signal
energy (not variance) at top term.
Practically there should be no mean, so it would not matter anyway.
Regards
Piyush
On No...Re: Autocorrelation
Piyush Kaul - 2008-11-18 00:19:00
For M-sequences the autocorrelation should have a peak after every
2^M-1 symbols.
"How to find auto-correlation"?? I don't get the question.
Autocorrelation is always defined as..
r(tau) =3D Sum_t...Re: Where is the matched filtering operation in this?
Piyush Kaul - 2008-11-07 04:43:00
There is no matched filtering here if we use "euclidean metric". But
we don't usually use "euclidean metric" in MLSE equalizer due to the
complexity. What we usually use is the "matched filter metri...Re: questions about WiMAX UL PHY processing
Piyush Kaul - 2008-11-07 01:58:00
Till the time we are able to take a FFT window which includes symbols
from all terminals (i.e. The timing difference between earliest and
latest terminal is less than cyclic prefix length), we shoul...Re: implementing division on tms-dsp-processors
Piyush Kaul - 2008-10-29 00:18:00
There are two common methods of implementing division in a fixed-point
DSP that doesn't have division instructions.
1) Using repeated substraction method (long division type). An example
is given i...Re: Random Stationary Process
Piyush Kaul - 2008-10-28 04:15:00
No. It would not be even be Wide-sense stationary (WSS).
Proof:
Suppose
Mean(x(t)) =3D E{x(t)} =3D mu
Variance(x(t)) =3D E{(x(t)-mu) * (x(t)-mu)'} =3D sigma
Where mu and sigma are constant...Re: Best DSPs for communication applications
Piyush Kaul - 2008-10-24 02:17:00
For OFDM modems, it is very useful to have some support for FFT in the
instruction set or else have a dedicated accelarator for it. So please
check for things like single cycle complex multiplicatio...Re: Comparing two similiar audio files, FFT?
Piyush Kaul - 2008-10-24 01:55:00
On Oct 8, 7:49=A0pm, kieran wrote:
> Hello,
> I am trying to compare two similar audio files (WAV). From what i have
> read i need to sample both audio files at certain frequencies and run
>...Re: power llimited and band limited channels
Piyush Kaul - 2008-10-24 01:23:00
On Oct 22, 6:45=A0am, "parwaz" wrote:
> Hello ;
> Can anyone explain me what exactly is power limited channels and band
> limited channels??
> Can a same signal be transmitted through power...