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70 Threads found on edaboard.com: **Gaussian Filter**

Let,
Signal Bandwidth - B_S
Noise Bandwidth - B_N
**filter** Bandwidth - B_F
Power:
Signal : P_S (Over its Bandwidth B_S)
Noise : P_N (Over its Bandwidth B_N)
Noise varies with frequency (in case of Coloured **gaussian**).
Effect of Changing one on the other:
1) Bandwidth:
As Bandwith is reduced to say B_F1 both signal and Noise

Digital Signal Processing :: 04-18-2007 05:52 :: hurrynarain :: Replies: **3** :: Views: **16194**

in general cases
Find the noise variance or estimate it
use the "fspecial" to design u r quick **gaussian** **filter**
might work easily ..but it depends of the noise distribution...
If u want a real good answer....u r questions must be very specific

Digital Signal Processing :: 04-13-2007 09:48 :: helios :: Replies: **26** :: Views: **68927**

hi guys
does the **filter** response such as Butterworth, Chebyshev and **gaussian** apply to all type of **filter**s or just lowpass prototypes ?
Thanks

RF, Microwave, Antennas and Optics :: 03-05-2007 18:53 :: prabu_9 :: Replies: **1** :: Views: **1159**

To generate a Rayleigh fading channel model, you first generate real and image part of the independent **gaussian** process, then you need design a **filter** to have the spretrum similar to Jakes model, i.e, to have the Bessel function as the auto-correlation. Passing through the I, Q **gaussian** process to this **filter**, you oculd get (...)

Digital communication :: 02-05-2007 23:38 :: spweda :: Replies: **15** :: Views: **54504**

You need P2 statistics to determine P3. As mentioned above you may use a correlator if the noise is **gaussian** else you need to use a general matched **filter**.
BRM

Elementary Electronic Questions :: 01-29-2007 09:19 :: brmadhukar :: Replies: **4** :: Views: **923**

The hight IF is the best beacause the if **filter** i **gaussian** and adapted at the pulse duration.
BP=1.2/τ.
this is the best result of signal noise ratio.
the pulse duration depend of the minimal resolution in distance (150m/?s).

RF, Microwave, Antennas and Optics :: 01-11-2007 13:13 :: casper :: Replies: **2** :: Views: **1127**

Hello, all.
Now i am doing palmprint recognition....But i face some problem. The problem is i don't know how to apply sobel edge detection and **gaussian** to extract the line from the palm image....i try to refer some papers and books...and found that the sobel is need to find in 0, 45, 90 and 135.....But i don't know how to apply it in my source

Digital Signal Processing :: 09-28-2006 02:02 :: yuna :: Replies: **4** :: Views: **8571**

Although the **filter**s may have the same basic topologies the value of **filter** elements determine **filter** properties. These are flatness, passband ripple, steepness, stopband attenuation, group delay characteristic etc. Each **filter** type has it's own transfer function usually named by inventors name. These are (...)

RF, Microwave, Antennas and Optics :: 09-12-2006 04:18 :: Borber :: Replies: **1** :: Views: **1077**

hi,
if u know how to implement the MSK, then just add a **gaussian** **filter** at the o/p of the Tx.
regards,
a.safwat

Digital communication :: 09-09-2006 05:45 :: safwatonline :: Replies: **7** :: Views: **4023**

The Watershed Transform **filter**:
--------------
A Gabor **filter** is a linear **filter** whose impulse response is defined by a harmonic function multiplied by a **gaussian** function. Because of the multiplication-convolution property, the Fourier transform of a

Digital Signal Processing :: 09-06-2006 05:04 :: ivar4ever :: Replies: **1** :: Views: **1398**

i'm doing a final year project..
based on image processing...
my scope are to detect the expression in face...
my method are by using a **gaussian** to **filter** out the features on vertical
and the horizontal..
nest is by using the eigenface value..
to optimize the effective of my image processing..
now i'm need coding in mathlab...
anyone who h

PC Programming and Interfacing :: 08-14-2006 02:55 :: aremay :: Replies: **0** :: Views: **1087**

It is important to select propper degre of compensation. There exists a degree of compensation where group delay and total delay is allmost constant up to the end of passband and is lower. It looks like realization of **gaussian** **filter**. This degree of compensation does not give max increase of bandwidth but a little bit les and does not increase dela

Analog Circuit Design :: 08-11-2006 17:50 :: Borber :: Replies: **9** :: Views: **4734**

The placement depends on the response you want. For constant time delay with frequency, the poles are those of flat delay **filter**s (**gaussian** or Thompson) with mirror image zeros.

RF, Microwave, Antennas and Optics :: 07-19-2006 11:22 :: flatulent :: Replies: **4** :: Views: **2526**

hi,
GFSK is very much like 'FSK' (frequency shift keying). Except that in GFSK, the baseband signal is passed though a '**gaussian** **filter**' before it modulates the carrier, which reduces its bandwith (effectively, rounding off the edges :D ). **gaussian** **filter**s are not simply 'low-pass **filter**s', but have a (...)

Digital communication :: 04-20-2006 02:30 :: Buriedcode :: Replies: **6** :: Views: **4191**

encode the signal the modualtion at the rec

Digital communication :: 04-05-2006 14:46 :: Maya Laxman Sawant :: Replies: **0** :: Views: **2848**

Hi neoflash,
any **gaussian** stationary stochastic process **filter**ed by a linear time-invariant system is **gaussian** at the ouput.
This can be seen from the convolution integral that relates the output with the input, and by the fact that the linear combination of **gaussian** random variables is another **gaussian** (...)

Digital communication :: 02-14-2006 21:02 :: zorro :: Replies: **3** :: Views: **2191**

Hello All,
I want to make a GFSK signal as a input stimulus for Hspice transient simulation.
Could any macro-model or VCVS generate a GFSK signal?
or Is there any macro-model of **gaussian** **filter** for Hspice simulation?
How I could get a GFSK signal in Hspice?
Thanks!

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 05-08-2005 04:13 :: cqmyg5 :: Replies: **0** :: Views: **1595**

Dear all:
I need to implement **gaussian** **filter** to do modulation FSK.
Someone know how to implement **gaussian** **filter** in FPGA
or algorithm or code?
Thanks .

PLD, SPLD, GAL, CPLD, FPGA Design :: 04-06-2005 06:23 :: super :: Replies: **2** :: Views: **2528**

Hi,
I'm interested in an algorithm (or source code, any language) for calculating the pole locations for a **gaussian** to 6db or **gaussian** to 12 db **filter**. I have sources that provide the pole locations, and software applications that calculate the pole locations, but I need the algorithm. I suspect that it's done by some kind of (...)

Analog Circuit Design :: 03-28-2005 17:51 :: Kral :: Replies: **1** :: Views: **1724**

Hi Valiant,
An exponential decay pulse:
0 for t<0
k*exp(-t/tau) for t>=0
is the impulse response of a single pole low-pass **filter**.
If you apply an impulse to a cascade of many identical low-pass stages (it doesn?t matter their shape, it?s enough they are identical), the result is asymptotically a **gaussian** pulse:
0 for t<0
k*ex

RF, Microwave, Antennas and Optics :: 03-04-2005 13:34 :: zorro :: Replies: **1** :: Views: **2910**

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