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Is there any expert who knows how the SNR result in the RF Budget Analyzer is calculated? Why is it inconsistent with the value I calculated?
Hi ZW, It's good to work out things independently as you are doing. The available power is 0 dBm, i.e. 1 milliwatt = -30 dB wa...
Is there any expert who knows how the SNR result in the RF Budget Analyzer is calculated? Why is it inconsistent with the value I calculated?
Hi ZW, It's good to work out things independently as you are doing. The available power is 0 dBm, i.e. 1 milliwatt = -30 dB wa...
1 day 前 | 1
| 已接受
已回答
Peak in probability distribution moves in normpdf when changing lower bound for input vector
Hi Chris, try x = 10e3:70e3; plot(x,normpdf(x,40e3,6e3)) The problem occurs because if you create y = f(x) and use plot(y), t...
Peak in probability distribution moves in normpdf when changing lower bound for input vector
Hi Chris, try x = 10e3:70e3; plot(x,normpdf(x,40e3,6e3)) The problem occurs because if you create y = f(x) and use plot(y), t...
3 days 前 | 2
| 已接受
已回答
Regarding grid generation using finite difference method (*code fixed)
Hello arxiv, It appears that what you want in the code is not new_x = x(n, m) + Delta_eta * ((pi/4) - y_xi)/(x_xi); but rath...
Regarding grid generation using finite difference method (*code fixed)
Hello arxiv, It appears that what you want in the code is not new_x = x(n, m) + Delta_eta * ((pi/4) - y_xi)/(x_xi); but rath...
10 days 前 | 1
| 已接受
已回答
solve Lagrange eqs.
Hi Lorenzo, The sin(phi) factor in the denominator does not really matter, in the sense that if phi can be zero, then the parti...
solve Lagrange eqs.
Hi Lorenzo, The sin(phi) factor in the denominator does not really matter, in the sense that if phi can be zero, then the parti...
13 days 前 | 0
已回答
How to remove a mirror tilt
Suppose the two mirrors, the source and the detector are as shown below. Assume the beam splitter does not have a wedge effect...
How to remove a mirror tilt
Suppose the two mirrors, the source and the detector are as shown below. Assume the beam splitter does not have a wedge effect...
17 days 前 | 1
已回答
Remove ignored complex values from a plot
Hi Arne, Either you are getting complex numbers because of an error in the algebra that you coded up (I assume you have checked...
Remove ignored complex values from a plot
Hi Arne, Either you are getting complex numbers because of an error in the algebra that you coded up (I assume you have checked...
18 days 前 | 0
已回答
bessel funtion drawing problem part two
Hello Zeyuan, You are using the expression Y(nu,z) = (J(nu,z)*cos(nu*pi) - J(-nu,z))/sin(nu(z)) which does not work when nu i...
bessel funtion drawing problem part two
Hello Zeyuan, You are using the expression Y(nu,z) = (J(nu,z)*cos(nu*pi) - J(-nu,z))/sin(nu(z)) which does not work when nu i...
18 days 前 | 0
已回答
trouver un angle avec l'equation de trajectoire d'un projectile
The syms solutions are getting out of hand, which is not all that unusual. The kinematic equations evidently are for a projecti...
trouver un angle avec l'equation de trajectoire d'un projectile
The syms solutions are getting out of hand, which is not all that unusual. The kinematic equations evidently are for a projecti...
24 days 前 | 0
已回答
Plotting inverse Laplace transform
Hi SA Speculative answer: I don't believe that the function F is a likely candidate for a Laplace transform. What you have is...
Plotting inverse Laplace transform
Hi SA Speculative answer: I don't believe that the function F is a likely candidate for a Laplace transform. What you have is...
26 days 前 | 0
| 已接受
已回答
Looking for linear system Ax=0 precision improvements
Hi vanni, My comment of March 4 discussed relative error calculations in solving for x in A*x = 0. (Some boring details are me...
Looking for linear system Ax=0 precision improvements
Hi vanni, My comment of March 4 discussed relative error calculations in solving for x in A*x = 0. (Some boring details are me...
1 month 前 | 1
已回答
Issue with Time-Domain Shifting Using Fourier Shift Property in MATLAB
Hi Jason, I believe the main issue here is that your time waveform has significant frequency content that exceeds the nyquist f...
Issue with Time-Domain Shifting Using Fourier Shift Property in MATLAB
Hi Jason, I believe the main issue here is that your time waveform has significant frequency content that exceeds the nyquist f...
2 months 前 | 0
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Finding the points where Bessel functions are equivalent
Hi Matthew, If you scale this problem properly, the process is much clearer. And in this case, It also allows f...
Finding the points where Bessel functions are equivalent
Hi Matthew, If you scale this problem properly, the process is much clearer. And in this case, It also allows f...
2 months 前 | 1
| 已接受
已回答
Error in the diagonalization of the Hamiltonian of the Zeeman effect
Hi Sebastian, The best way would be to find four subspaces that are not coupled by the Hamiltonian when BF is included. That m...
Error in the diagonalization of the Hamiltonian of the Zeeman effect
Hi Sebastian, The best way would be to find four subspaces that are not coupled by the Hamiltonian when BF is included. That m...
2 months 前 | 0
已回答
What does cart2sph compute az,el,r or theta,phi,r
Hi William, it's az and el. [a b r] = cart2sph(0,1,0) a = 1.5708 b = 0 % elevation r = 1 [a b r] = cart2s...
What does cart2sph compute az,el,r or theta,phi,r
Hi William, it's az and el. [a b r] = cart2sph(0,1,0) a = 1.5708 b = 0 % elevation r = 1 [a b r] = cart2s...
2 months 前 | 1
| 已接受
已回答
Why is my matrix being multiplied by scientific notation?
Hi Valerie, Since the data has widely varying values, there usually has to be an overall scaling of some kind. That is what yo...
Why is my matrix being multiplied by scientific notation?
Hi Valerie, Since the data has widely varying values, there usually has to be an overall scaling of some kind. That is what yo...
2 months 前 | 0
| 已接受
已回答
Write different super gaussian function with same fwhm but different order
Hi Hugo, There seems to be some confusion as to whether the constant that is used as the reference constant between various val...
Write different super gaussian function with same fwhm but different order
Hi Hugo, There seems to be some confusion as to whether the constant that is used as the reference constant between various val...
2 months 前 | 0
| 已接受
已回答
Error in executing freqz command on LINUX server
Hi Neuling, If all else fails you could just write your own version. Something like function [H w] = freqz1(b,a,n); % parall...
Error in executing freqz command on LINUX server
Hi Neuling, If all else fails you could just write your own version. Something like function [H w] = freqz1(b,a,n); % parall...
3 months 前 | 0
| 已接受
已回答
problem using fplot for small arguments of spherical bessel functions
Hi Donaldo, As you probably know, the function works pretty well except for small values of r around the origin where you see a...
problem using fplot for small arguments of spherical bessel functions
Hi Donaldo, As you probably know, the function works pretty well except for small values of r around the origin where you see a...
3 months 前 | 1
已回答
SVPWM abnormal current under inductive load
Hi Bahdir, I believe the effect is real and can't be 'solved'. When the loads are purely resitive, the current and voltage are...
SVPWM abnormal current under inductive load
Hi Bahdir, I believe the effect is real and can't be 'solved'. When the loads are purely resitive, the current and voltage are...
3 months 前 | 0
已回答
Hello everyone, I have a question about numerical integration. The formula is shown below, where the integration path C_beta is a closed curve on the complex plane.
Hi MJ, The result depends on what goes on in the complex plane, so as an intro here are some plots of the angle of functions f(...
Hello everyone, I have a question about numerical integration. The formula is shown below, where the integration path C_beta is a closed curve on the complex plane.
Hi MJ, The result depends on what goes on in the complex plane, so as an intro here are some plots of the angle of functions f(...
3 months 前 | 0
已回答
How do I apply a gravitational gradient to this code? (particles in elastic collision)
Hi Alex If you don't need the details of the actual trajectory, the method is pretty simple. Modeling the asteroid as a sphere...
How do I apply a gravitational gradient to this code? (particles in elastic collision)
Hi Alex If you don't need the details of the actual trajectory, the method is pretty simple. Modeling the asteroid as a sphere...
4 months 前 | 0
已回答
How do I find the equation of points on a spline curve?
Hi Aiden, you have to remember that for each section of the spline, the polynomial is local to that section, i.e. the argument ...
How do I find the equation of points on a spline curve?
Hi Aiden, you have to remember that for each section of the spline, the polynomial is local to that section, i.e. the argument ...
4 months 前 | 0
已回答
When I use ode45 to solve a state space equation, the solution will be diverge. Interestingly, if I set the ma (which I've overstriked) to zero, the result will be converge.
Hi Z^2, It's not easy to say for sure without seeing the actual model, but I think there is a decent chance that your C matrix ...
When I use ode45 to solve a state space equation, the solution will be diverge. Interestingly, if I set the ma (which I've overstriked) to zero, the result will be converge.
Hi Z^2, It's not easy to say for sure without seeing the actual model, but I think there is a decent chance that your C matrix ...
4 months 前 | 0
| 已接受
已回答
Finding the Analytical Equation q(t) for an RLC Circuit Using Given V(t) Data
Hi Trais, The exact solution for q(t) involves integrating the voltage for times less than t. Let w = sqrt(-R^2/4L^2 + 1/LC) ...
Finding the Analytical Equation q(t) for an RLC Circuit Using Given V(t) Data
Hi Trais, The exact solution for q(t) involves integrating the voltage for times less than t. Let w = sqrt(-R^2/4L^2 + 1/LC) ...
4 months 前 | 0
| 已接受
已回答
Inverse fft doesn't match analytical formulation
Hi SW, There is a sign error in your transform pair, which should be 1/w^2 <--> -|x|/2 not 1/w^2 <--> |x|/2 As has been n...
Inverse fft doesn't match analytical formulation
Hi SW, There is a sign error in your transform pair, which should be 1/w^2 <--> -|x|/2 not 1/w^2 <--> |x|/2 As has been n...
4 months 前 | 1
已回答
why the voltage across a resistor with two different input DC source is the avg of the two different input DC voltage
Hi RAM, The 1 ohm resistor is quite a bit larger than the two .01 ohm resistors so in a first approximation the 1 ohm resistor ...
why the voltage across a resistor with two different input DC source is the avg of the two different input DC voltage
Hi RAM, The 1 ohm resistor is quite a bit larger than the two .01 ohm resistors so in a first approximation the 1 ohm resistor ...
5 months 前 | 0
已回答
INTEGARTION OF BESSELH function
Hi george, I don't know what the values of your parameters are, but it appears that the problem with Escat is that besselh(0,2...
INTEGARTION OF BESSELH function
Hi george, I don't know what the values of your parameters are, but it appears that the problem with Escat is that besselh(0,2...
5 months 前 | 0
| 已接受
已回答
No feasible solution found
Hi Preston, It seems likely that this is a planar structure with the diagonal elements having length sqrt(2). (If all th...
No feasible solution found
Hi Preston, It seems likely that this is a planar structure with the diagonal elements having length sqrt(2). (If all th...
5 months 前 | 0
已回答
2D Fourier transform- problems with the shift
Hi nathan, It is a bit more inconvenent but you can reconstruct using a shifted grid as you did. I kept that method in in the ...
2D Fourier transform- problems with the shift
Hi nathan, It is a bit more inconvenent but you can reconstruct using a shifted grid as you did. I kept that method in in the ...
6 months 前 | 0
| 已接受
已回答
How to find indices of resampled values from the indices of the original values?
Hello Mibang, Rather than snew = resample(s,fsnew,fs) I think it's safer to use [snew tnew] = resample(s,t,fsnew) because t...
How to find indices of resampled values from the indices of the original values?
Hello Mibang, Rather than snew = resample(s,fsnew,fs) I think it's safer to use [snew tnew] = resample(s,t,fsnew) because t...
6 months 前 | 1
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