Questions tagged [snr]
Signal-to-noise ratio (often abbreviated SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise.
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SINAD and ENOB calculation
I have an ADC which has 14 bit, 100 MHz sampling frequency. I collected data 6.103 kHz sinus wave. I try to calculate SINAD. However, I can't find same result as in MATLAB. Let me explain more.
I ...
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How Does Signal Crest Factor Influence SNR and Effective Resolution in ADCs?
Recently, I've been looking into how crest factor of the signal affects the SQNR and i found what i think is an interesting relationship.
For example, take a signal in the range $[-V_p, V_p]$ and for $...
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Am I generating audio signal with a given particular SNR value correctly?
I am using this as my reference:
https://www.mathworks.com/help/deeplearning/ug/denoise-speech-using-deep-learning-networks.html
Add washing machine noise to the speech signal. Set the noise power
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Why quantization noise correlates with the signal based on the sampling frequency to signal frequency ratio?
I've been the reading the walt kester's "Taking the Mystery out of the Infamous Formula,
"SNR = 6.02N + 1.76dB," and Why You Should Care", In page 5/7,he mentioned,
the correlation ...
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How can I add Audiofiles to an large Audiofile with specific SNR with no clipping
I have an audio file that I want to use as background noise.
I also have other audio files that are to serve as foreground sounds and are to be placed at certain times. How can I ensure that there is ...
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Received signal SNR measurement
I am simulating the communication system shown below. I want to analyse the Fractionally-spaced Equalizer performance through BER vs SNR simulations. To meet a target SNR, I scale the noise power ...
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Matlab SNR Function
While examining the snr function in Matlab, I noticed something like this.
When I examined the code and output given in their examples, I noticed that the ratio between average noise power and average ...
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Using Signal to Noise Ratio (SNR) formula for machine learning metric evaluation
As the SNR function is not commutative (meaning different argument positions will lead to different output results), it makes me confused to use it as metric evaluation.
I have this 3 signal; those ...
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Is -40dbm power for AWGN considered too high and unrealistic?
I am reading a research paper on NOMA BER performance. For the simulation the author chooses oddly high awgn power -40dbm ( considering noise spectral density -174+10logB this would result in ...
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BER curve versus SNR for using matched filter receiver
I want to simulate matched filter receiver with rectangular pulse shape in an AWGN channel. My goal is to plot the BER curve versus SNR for BPSK modulation. I have written the code and my curve is as ...
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Understanding the additive white Gaussian noise (AWGN) representation
In my research work in wireless communication, I came across an equation of received signal wherein the AWGN is denoted by $n\sim\mathcal{C}\mathcal{N}(\textbf{0},\textbf{I}_L)$.
Note that dimension ...
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Related to dimension of wireless channel , transmitted signal and received signal
I am working on wireless research project and I had query in understanding dimensions.
Consider a MIMO system, where a base station with $N$ antennas transmits signal $x$ to receiver with $M$ antennas....
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5G BER vs SNR for QPSK, 16QAM, 64QAM
Recently been running simulations where I run through simulating passing random data bits through LDPC Encoding, Modulation (4, 16 or 64) and then AWGN. The code itself is 90% developed by myself with ...
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Doppler radar. Signal to noise ratio
I'm trying to figure out how a continuous wave Doppler radar works. When moving towards the radar, the Doppler frequency should increase, and when moving away from the radar, the frequency should ...
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Matched filter reference signal
The matched filter is an optimal filter that maximizes the Signal-to-Noise Ratio (SNR) to minimize the probability of error on a received signal. It is based on convolving the received signal with a ...
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Correcting noise floor of DFT sampled signal
As mentioned in the slide below (full slides located here, starting at PDF page 29), the apparent noise floor on a DFT plot depends on the number of sample points $N$ used to calculate the DFT. The ...
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What's the minimum nearest neighbour approximation of this?
What's the minimum nearest neighbour approximation and upper approximation of this?
Consider a modulation design with the signal space diagram illustrated in
the figure below. The signals are ...
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Relation of SNR and BER
I am working towards establishing the error rate of the communication system relying on on-off keying. I have trouble understanding the estimation of bit error rate (BER) performance when the ...
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Correlated Quantization Noise
Normally, when we are dealing with quantization noise, we assume quantization noise as uncorrelated, which is white.
In this case, we assume SNR = 6.02N + 1.76 where N = resolution
However, if ...
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For the same SNR, does gaussian noise has the minimum BER?
Let me simplify the question: assuming a PAM-4 signal {-3,-1,1,3} with noise added. I focus on the BER for the signal 1. My question is: with same noise power, does Gaussian noise have the minimum SNR?...
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EIRP for JWST HGA
I am attempting to compute the EIRP for transmissions from the James Webb Space Telescope using the high-gain antenna. I found the following reference...
https://www.ioag.org/Public%20Documents/2019-...
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Is there any way of calculating the portion of signal lost as we keep on reducing the passband edge frequency of a band-pass filter?
Any kind of references would be appreciable.
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How to calculate The Signal-to-Noise Ratio (SNR) in dB (different units)?
Recently, I've ventured into a new domain that I intend to incorporate into my work. After thorough research and consultation, I've found this model to calculate the data transmission rate (Capacity).
...
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How to test for SNR for an ADC
I have a 24 bit ADC and I need to test for signal-to-noise ratio. I have a function generator which can generate different signals, so can I simply take 10*log10(power of signal/power of noise)?
When ...
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How to understand Fading Channel with no CSI at the Receiver
From the book Fundamentals of Massive MIMO, the section 2.3.4 shows that the expression of the received signal in fading channel with additive non-Gaussian noise and no CSI at receiver is dervied as:
$...
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Relationship between received SNR and Eb/N0
I want to show the bit error performance of a communication link using QPSK in a system containing a channel and antennas. The resulting received SNR is calculated by:
$$
SNR(f) = \frac{P_\text{t} \...
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SNR from sampled signal
Is there any procedure described, or some example code (in Matlab) to calculate SNR from the sampled real signal?
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compute EVM for MIMO channel including additive Gaussian white noise
Good time. I would like to compute EVM for a Rayleigh channel including additive Gaussian white noise. The accepted EVM for BPSK issued by IEEE is -5dB. Since the variance of white noise depends on ...
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Mean square error for a quantizer - problem in integral
There are similar questions about related problems that I honestly didn't understand. I believe this might be a lack of statistics knowledge of my part.
Quantization error standard deviation
Error ...
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Print out the BER vs SNR function graph in python
First of all if this isnt the place to post these types of exercise please point out where do i post it and thank you in advance
We are asked in this exercise to print out the SNR vs BER graphs for ...
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Adding Independent Noise
Signal processing often involves managing and optimizing Signal to Noise Ratio (SNR). To achieve this, one may need to work with noise budgets and ensure that any additional additive noise sources are ...
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SNR After Dividing Two Noisy Signals
About impedance calculations, I have to build the quotient of voltage and current. This is done in the frequency domain after, e.g. Fourier transform to get a spectrum. I'm trying to calculate the SNR ...
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How to calculate signal to noise ratio (SNR) from a list (sequence) of amplitude?
Suppose I have a list of amplitude (straight line signal):
x = [1,1,1,0,1,1,1,1]
By intuition, zero value in list x makes the noise of straight signal.
If we ...
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Dynamic Range Scaling for Delta Sigma Modulation
I've been trying to follow along with this example in the book "Understanding Delta Sigma Data Converters" and I am completely confused as to how the authors came about the appropriate ...
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Basic audio denoising in the frequency domain using minimum statistics?
I'm trying to do some example elementary denoising of the audio signal. Let's say input is speech with constant traffic background noise.
First I calculated block-based overlap-add Fourier transform (...
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Confusion regarding formula of SQNR? Finding SQNR using MATLAB
I am learning about SQNR and when i google i get its formula that it is equal to
6.02 db(per bit)+1.76 db
But in our Lab/class, we saw different formula ,which is following formula when using MATLAB:
<...
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What parameter to use to decide if accelerometer data are noisy?
I would like to do regression thus I need to know if my input data are noisy.
In this case, I generate accelerometer data [x, y, z] from the sensor.
I have a look ...
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Issue with SNR and SINAD Measurement using Matlab Functions in specific cases
I have a MATLAB code in which I need to calculate the SNR and SINAD of received signal at known frequency (assumed as tone signal). The issue is that sometimes the power at that frequency is lower ...
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Best 'SNR-like' detection statistic for time series signal in the wavelet domain?
What is the best way to define a detection statistic for a time series event trigger generator, which computes the wavelet transform of some time series data? I want such quantity to be similar to a ...
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Minimal SNR to distinguish LFM target from noise at range doppler output
I am working on a radar signal processing project using MATLAB. I am required to simulate range doppler maps for Linear Frequency-Modulation (LFM) targets (non-fluctuating) in noise at various SNRs (...
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Calculating SNR of one N-point DFT over another M-point DFT in frequency domain
Consider N-point sine signal mixed with a random noise (implemented in Python below):
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How to calculate SNR with White gaussian noise
Im working on a Pulsed Doppler Radar
What is the way to calculate the SNR (with WGN)? What will be the lowest SNR for detectability?
Im using matched-filter(xcorr) to process the signal+noise.
My ...
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Understanding the signal to noise ratio (SNR)
In my work, I came across the following expression of signal to noise ratio (SNR) which contains expectation operator.
The received sampling vector is
$\textbf{y}(n) = \textbf{h}s(n)+\textbf{u}(n)\tag{...
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Noise variance estimation
could anyone recommend some articles how to estimate noise variance for the single carriers system with burst mode transmission (preamble+data TDMA)?
My goal at the beginning is to develop skills how ...
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Compute SNR of a signal with not clear fundamental frequency in PSD
I'm trying to compute SNR from a signal in which by visual inspection I can guess the SNR but I cannot compute it because I cannot find the fundamental frequency of the signal as I should be.
On the ...
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Performance Effects of Dropping ADC Least Significant Bits before DSP processing (Besides the Obvious)
What would be the effect of dropping LSBs of an ADC on the performance of a DSP system apart from the obvious reduction in dynamic range. For example if there is a 14 bit ADC and only 10 bits are used,...
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SQNR vs SNDR (with regards to Delta Sigma Modulation)
With regard to delta-sigma modulation, I understand that SQNR is the ratio of the signal power within our frequency bandwidth to the noise power within our bandwidth (in-band quantization noise). What ...
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Interpreting SQNR from a Graph
I'm pretty confused about SQNR/SNR conceptually. I understand that this is a function of the power of the signal to the power of the noise. Is it not the case that we would be able to derive a value ...
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snr of awgn in matlab before and after filtration
I'm studying a system's transient characteristics with awgn added to an input signal and I need to calculate $\text{SNR}$ before and after filtration.
Here is my code to generate input and output:
<...
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Noise with a positive or negative mean
I am working on calculating the SNR for my network model.
Considering AWGN at the receiver with zero means, the SNR can be presented as
$$\text{SNR} = \cfrac{P \cdot|h|^2}{\sigma ^2}$$ where $P$ and $...
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