Snr Definition and 24 Threads

Hello everyone, I have a question regarding shielding effectiveness and how it relates to SNR. Do you know what equation should be used to calculate SNR based on shielding effectiveness? Let's say the shield is an aluminum foil made into a dome covering transmitter and receiver inside. A general...

Problem Statement: I am not quite sure how to approach this problem and would appreciate the help. I how the C/N is closely related to the SNR (Eb/N0), but the question does not give the bandwidth or data rate for me to use the formula above. From the constellation diagram, my guess is this is...

Empirically, photomultiplier tube (PMT) is said to present better signal-to-noise ratio (SNR) than avalanche photodiode(APD). Some materials say that it is attributed to the higher gain and lower dark current of PMT. The benefit of higher gain is confusive for me, since I suppose that noise (of...

Hi, I'm trying to model the transmission loss and SNR of an acoustic signal underwater. I'm using this expression to modelize the transmitted signal: y = sqrt(P)*exp(1i*2*fr*pi*t)' where P is the transmission power in watts, fr is the transmission frequency and t is the acquisition time. The...

I'm currently working with the 1d DEEP2 DEIMOS fits files (see http://deep.ps.uci.edu/deep3/specprimer.html) and am trying to define some exclusion criteria in Python 2.7 for the data based on the noise. What's the best way to quantify the noise in order to do this? Thank you!

In PET, 2D PET scanners have a superior SNR to 3D PET scanners as the influence of scatter and random events is lowered by the septa between detector rings. However, the NECR (noise-equivalent count rate), which is linearly proportional to SNR, is higher in 3D PET scanners. These two facts seem...

Homework Statement A high-speed optical data communication system is composed of a transmitter, an unamplified transmission fiber link, and a receiver. The optical transmitter generates a 10-Gb/s non-return-to-zero (NRZ) signal using a 1550-nm laser diode (linewidth=2 MHz) followed by a...

Homework Statement (1) An ideal digital detector only suffers from quantum noise. If, after being exposed to 5 µGy the mean pixel value in the image is 100 and the standard deviation of the pixel values in the image is 5, calculate the SNR? The relationship between pixel value and detector...

Does SNR give a clue to bandwidth limitations? i. e. Would it help to figure out how the signal is distorted due to the limitation of the bandwidth? I think answer is "no" though.

If you have a satellite that is transmitting at X dbm to a ground station, will increasing the gain of your LNA allow the satellite to use less transmit power? It seems like you'd have to improve the SNR in order to increase BER or Eb/No... If you just increase gain of the LNA, then yes, your...

I would like to know in the following equation (attached) how can I incorporate BER for BPSK? is BER the same as Rc? The equation is relation between SNR and sigma square.

I am looking at the same object with two detectors. The SNR on each is 2, which is a low probability of detect given a single sensor. However, if I fuse the two what would be the SNR then? Would it be additive (SNR=4) or rss (SNR=2×sqrt(2)) or something more complicated?

Thank you in advance for your help!What is the bandwidth efficiency (R/B) of PSK for a bit error rate of 10^-7 on a channel with an S/N of 12 dB?[/b] From the graph, for BER= 10^-7, Eb/N0 = 11.2 dB./b]I have applied the formulae Eb/N0 = S/N * B/R Where, S/N is Signal power over noise power *...

Hello All I have a question regarding the SNR of an optical signal The optical signal was measured with a FFT Spectrum analyzer with the amplitude in dBV - the "SNR" was observed to be 60dB (peak value in dBV - noise floor value in dBV = "SNR" in dB) The SNR is typically reported as...

I'm making a system with PLL. Here's more or less a principal scheme. What happens here is that the signal in this compensating system becomes really low and phase detector might not work properly. What I want to ask, what type or how to make a phase detector which can detect phase correctly...

If I posted in the wrong section, please feel free to move the thread in the correct one. Since this is my first post in the forum, I have yet to get a good grasp of it. With that said, let's begin! Prologue: SNR (Signal to Noise Ratio), sometimes indicated with S/N, is a very important...

Hi, I have a vector 'A' of length 'n', whose values change with time. 'A' gives the change from a baseline 'B'. I calculate a signal as the distance A from the average of B, i.e., If 'B' is my baseline, then the signal at a time 't' due to A(t) would be given by S=(1/n)*(Ʃ1Ai -<B> - Ʃ2Ai...

I am disappointed by the fact that receiver noise seems to be directly proportional to bandwidth. With a raised cosine shaped pulse transmitter the bandwidth is the more or less the reciprocal of the pulse duration. Short pulses mean large bandwidths and that means greatly reduced range, at...

Anyone know a source for a mathematical analysis relating the slit-size/throughput for a spectrometer vs SNR? I find that I always get better SNR (but not necessarily resolution) with a wider slit or higher throughput monochromator when doing emissions work. Fritz

Dear all, I am trying to understand something for SNR, I know that is the ratio of the Power of a signal divided by the Power of noise. According to wikipedia Signal-to-noise ratio is defined as the power ratio between a signal (meaningful information) and the background noise...

Hi all, It's been many years since I did Mathematics last and I'm having trouble converting from db to the format required by Shannon's formula. I've googled and looked in the textbook but it's all a bit technical for me, I see logs and formula manipulation and go cross-eyed. I...

I read in my analog communication book: "A relatively small increase in bandwidth buys a large advantage in terms of reduced transmission power. But a large increase in transmitted power buys a meager advantage in bandwidth reduction. Hence, in practice, the exchange between B and SNR is...

Dear all, I have questions regarding to the relations betw SNR and receiver gains (digital and analog): We have a system that allows us to set the analog receiver gain (ARG) and digital receiver gain (DRG). The signal doubles if we increase one integer of either ARG or DRG (eg from 12 to...

I posted the details of myquestions earlier but no help. Maybe I need to rephrase it. I basically generated a square wave and added noise to it using Matlab. The question is how do I design a filter to reduce as much noise as possible to retain most of the square wave. The SNR is OdB...