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# Envelope Detection

14 Threads found on edaboard.com: Envelope Detection

## Peak envelope detector and ssb detection?

envelope of SSB rectified with detector does not recover intelligible audio. AM has envelope which after rectification gives normal audio. One of method for demodulation of SSB is to first mix SSB with carrier to get AM and then rectify it.

## Hilbert Transform usage in Envelope Detection

Hi 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

## Envelope detector, how does it actually work?

As the diode is a nonlinear device, it is right to say that there are mixing or intermodulation products of the different components. This is not the most simple way to understand the process of envelope detection, but this is an important concept for undertstanding the behavior of the detector at very low SNR, i.e., below threshold. Regards Z

## Digital envelope detection

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.

## envelope dectector vs Product modulator

A phasorial picture helps to see the effect. Think in an ideal envelope detector (regardless of diodes or circuits, but a mathematical model): At high SNR, the quatrature component of noise practically does not change the modulus of the phasor. The variations in ampitude fo

## need help in simulink ....envelope detection

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.

## Looking for schematic of an envelope detector circuit

THis circuit must be able to follow the RF input signal envelope, how to check its capability? could you help me in this way?

## Designing a RF envelope detector with 3G input signal

Hello, 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? thank you

## Verilog Code/ Algorithm for AM, FM and/or PM Demodulation

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

## Chi-squared distribution

Hi, 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. BRM

## What is meant by envelope detection?

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

## Envelope detector- sync or async detector?

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)

## Envelope detector for FM

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 (...)

## envelope detection circuit, & power detection circuit.

hi elektro guys. I want to know envelope detection circuit & power detection ciruit. who have these schematic or diagram.? please help. loverrf.