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Question: A continuous-time signal x(t) = cos(f(t)), where f(t) = w0 + sin(w0t), is to be sampled at a rate fs.
What is the system’s Nyquist sample rate if w0 = 1000/(2pi) r/s?
I believe that w0=2*pi*f --> f= (1000/2*pi)*(1/2*pi) = 25.33 Hz and then multiplying by 2 to get the Nyquist...
I did a link budget analysis in syscalc for my receiver a simple heterodyne. I used 30 GHz are the fo, and IF=5 GHz. Range=238855 km (distance from moon-earth), and QPSK modulation, I also needed a BER of 1e-6. According to syscalc the sensitivity will be -59.6 dbm,margin - 130 db. The antenna...
I see so if the receiver output SNR before was 12 db, now it would be 15 db right, since the 3 db gain, but the noise figure remains the same, because SNR input signal increases? Since SNRout=SNRin(db)-NF(db)
If the SNR at a receiver output is say 12 db, and the antenna gain is increased from 3 db to 6db, but the antenna temperature remains the same, calculate the new SNR?
I think the SNR wouldn't change because antenna gain is not the same as amplifier gain and the noise figure did not change since...
I read that the second-order non-linearity could affect the DC offset, but does the third order non-linearity also affect the DC offset?
Also was wondering are these due to 3rd order nonlinearity:
- P1db due to signal itself
- p1db due to strong blocker (I'm not sure I understand the concept...
In a class I'm taking right now the professor assigned us a project to simulate a system that can transmit a 10gpbs signal to the moon from Earth using components that exist.
(1) I'm not sure whether this is really possible 10Gpbs is pretty fast
(2) If it is, how do I choose the proper...
Well for one as you may know the noise of the total system in this case:
F = F1 +F2-1/Gain1
From this equation you can see that the Noise Figure (F) is dominated by the first stage. This mean you have to make sure that the gain of the first stage is sufficient to support the second. Also you...
I'm trying to do a SNR calculation
INPUT-->LNA--->LPF
For example: If the input is 14 db, and the lna has a gain of 20db, and NF=3db, and the LPF filter has a insertion loss of 3dB
If I wanted to find out the SNR after the LPF. Is it right to do the follow:
14 + 20 -3 = 31 db? or do I need...
I recently bought the PIC16F914-I and the LCD LCM-S01602DTR. I'm not very familiar with LCDs and interfacing them with PICS. I understand the general pin layout of the PIC and the LCD. However, I'm not sure how where to connect which pins to my PIC since this model is suppose to be able to drive...
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