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Hello. I have heard of another method where they use no of independent voltages across the capacitor or independent current source through an inductor. i can't remember the exact way. Can anyone help me with this?
Thanks
If the bandwidth of the channel is less than the maximum frequency of the input signal (or in other words the bandwidth of the input signal) then you will have ISI or in other words the spectrum of the signal is getting degraded or changed because of which you have a corresponding change in the...
Hello erikl,
Thanks for the reply but I don't get it. What do you mean by δV/δt limitation? Are you talking about the RC response of a circuit? If that is the case then both higher and lower voltages has the same time constant τ as it depends only on the RC values and hence the time taken to...
Let's say that I have bought a 10-bit ADC (say). I am trying to test that ADC using a measuring instrument which has its own ADC. What should be the minimum resolution of that ADC in that measuring instrument?
(Assume that voltage rail-rail swing is same for both ADCs )
So What is the minimum...
I can understand MSK but there is something that I couldn't understand in the one given in Simon Haykin's book. Actually what is given in that book is they have kind of used a constellation for MSK similar to that of QPSK.
Consider
θ(t)= θ(0) ± (Π/2Tb)t where -Tb ≦ t ≦ -Tb
Now if you wish...
How to prove the parseval's theorem for a periodic wave say a sinusiod
Let
x(t)= cos ωot
We all know that the fourier transform has two impulses one at ωo and one at -ωo and the amplitude of both will be Π (pi)
But you can't prove the Parseval's theorem as the energy will be infinity and...
Ya ya. I forgot to divide. Anyway it is non-zero unlike awgn. As hanspi suggested I noticed this also- the mean kept on varying when I increased the number of samples for averaging. I read somewhere that 1/f noise is present everywhere. It looks as if it is related with the aging of the devices...
Correction. I tried once again and I got somewhat different result. But what I can assure you is that the sum of all samples ( I took 10 Meg samples) was about 500 (which is very high). What I couldn't understand in this 1/f noise is this- Even though the signal seems to be swinging around 0, I...
As we all know 1/f noise has more value near the DC. So obviously if you average the signal for a long time you are probably going to get some high value (at least little bit high). Does this mean that when you see a signal its DC (which is obtained by adding all values) is constantly increasing...
Shug I know that that is AWGN. The question what do they indicate in the above diagram. It doesn't look like the change in the amplitude as we usually see in PSK constellations. It looks more like change in the frequency (as you can infer from the above diagram). That's my question. I want to...
I have seen this question asked so many times but I couldn't find the required answer. Both matched filter and correlator seem to have the same expression. Matched filter seems to be implemented using filter while correlator can be done by mixing them and averaging. Both need synchronization for...
What does the noise in FSK constellation indicate? I mean you can see those clusters near the amplitude. Do they indicate a change in the frequency ??
Note that Φ1 and Φ2 are the basis function (which in this case is going to be two different frequencies that are orthogonal to each other) and...
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