13 Threads found on edaboard.com: Envelope Detection
I am working on envelope detection of a speech signal using Hilbert transform in matlab.. It's mentioned that assuming signal is y(n)
abs(y(n) + j*hilbert(y(n)) gives envelope of the signal..
How can this be interpreted intuitively?? I didn't understand the logic behind this... Could someone explain this to me
Digital Signal Processing :: 03-16-2013 02:35 :: anishsingh :: Replies: 2 :: Views: 2448
I have found this
which says that the envelope detector mixes the carrier of an AM signal with the sidebands to produce audio, which makes sense.
From the other side, I thought that an envelope detector does not used as a mixer, but it justs rectifies RF and converts it into a variable volt
Electronic Elementary Questions :: 11-14-2012 05:18 :: neazoi :: Replies: 14 :: Views: 1397
I need to detect the envelope of a signal with a 90 kHz carrier wave. Has anyone use the digital envelope algorithm by performing the following digital processes : sample signal, square signal, take a moving average (LPF) and take the square root of the signal.
Digital Signal Processing :: 10-15-2012 04:06 :: klystron :: Replies: 4 :: Views: 930
In AM receiver I read that if the SNR is very less then product modulator is better compared to envelope dectector. Why is that so?
Thanks a lot.
RF, Microwave, Antennas and Optics :: 08-15-2012 09:27 :: iVenky :: Replies: 11 :: Views: 1277
i have to narrow band pm modulation and demodulation is simulink. i have done modulation and for demodualtion i am doing envelope detection using hilbert transform. but its giving error .can any one please rectify this error. i am attaching the simulink file.
Digital Signal Processing :: 11-26-2010 06:32 :: khan001 :: Replies: 0 :: Views: 1382
I am looking for a simplest envelope detector circuit which consists of one diode,and a low pass (RC) filter.the envelope detector circuitry should be able to extract the 900MHz modulated signal.
If anyone has the schematic(with the RC value)/simulation(Agilent ADS) on the above mentioned specs,hope you could help me here as I need
RF, Microwave, Antennas and Optics :: 08-27-2008 10:09 :: tsy85 :: Replies: 11 :: Views: 4841
I need help about RF envelope detector design. I have to design it in order to implement an envelop tracking system with a RF power amplifier.
Does somebody have experience in envelope detector design with 3G input signal for example?
What kind of circuit is able to detect envelope and control a DC DC converter?
RF, Microwave, Antennas and Optics :: 12-19-2007 08:19 :: jayce3390 :: Replies: 1 :: Views: 3658
this type of code is hard to find, because the code generally is proprietary.
Does any one have a working Verilog code/ algorithm for envelope detection, phase discriminator and/or frequency discriminator? I already have a working code for demodulation of ASK and FSK but i dont think they'd work for their analog counterpart. Tha
PLD, SPLD, GAL, CPLD, FPGA Design :: 06-14-2007 09:25 :: funster :: Replies: 2 :: Views: 2444
Whenever you encounter envelope detection you find the Rice/Rayleigh distribution.
When you need to work with multiple rvs of rice/rayleigh (comparing, ... )
you need the Chi Square distribution.
Digital communication :: 05-14-2007 23:21 :: brmadhukar :: Replies: 2 :: Views: 1245
if u multiply x(t) by cos(wt) you'll get a signal that is bounded to a signal with the same shape of x(t) that is called the detect it you can simply use RC circuit
RF, Microwave, Antennas and Optics :: 02-02-2007 10:34 :: farzad_m :: Replies: 2 :: Views: 734
under which category will it come?i think that this question is paramount bcos all our receivers were fitted with envelope detector(...indeed a well known fact)
Electronic Elementary Questions :: 12-23-2005 08:43 :: electronics_kumar :: Replies: 3 :: Views: 1755
envelope detection is used to retreive modulation signal from AM signal, to demodulate it.
At FM it is first neccessary to convert FM to AM and use envelope detector as demodulator.
For FM to AM conversion a simple LC tank can be used. It is so tuned that FM signal frequency lies on a slope and not at the tank resonance.
The same (...)
RF, Microwave, Antennas and Optics :: 08-05-2005 21:44 :: Borber :: Replies: 2 :: Views: 3061
hi elektro guys.
I want to know envelope detection circuit & power detection ciruit.
who have these schematic or diagram.?
Other Design :: 01-10-2003 08:39 :: loverrf :: Replies: 7 :: Views: 4431