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Hi Andreas, you should specify the following points, that impact the type of approximation and the resulting complexity: a) which is the range of x over which you want the approximation b) what are the allowed errors and what type of specification do they have (i.e.: maximum absolute errors, maximum relative errors) c) what resources are allowed (
can anyone give a result for this integration ∫cos(sin(θ)) dθ unlimited or limited by any values may reduce any complexity Roshdy
FFT for x(t)=cos(2 pi f0 t) is simply a delta function at frequency of f0, with a certain amplitude (isnt this amplitude should equal 1/2?) Does that mean FFT for y(t)=cos(2 pi 2f0 t) is a delta function at frequency of 2f0, with the amplitude half of the previous one? (Based on the rule of f(a)=>F(f/a)/a. Based on (...)
because the when demdulator, for example the syn demodulator, the phase noise shall turn to the Amplitude, this is called the PM/AM of the demodulator, y can from the formuation cos(wt+theta)*cos(wt+phase_noise) to see this effect
Iv 2 equation to convert to get then working in c. I believe that i failed this step so il asking for help. cos(180-theta) = -(sin(lat)*cos(Phi)-sin(declin))/(cos(lat)*sin(Phi)); Need function to have only 1 variable at 1 side of equation. Example: (...)
Hello everyone, I would like to know if there's a software/matlab code I could use in order to convert the pattern of an antenna element to a formula that can be plotted in Matlab. For example : % element pattern of dipole antenna g(theta) = (...)
Hello, I am having a major issue with the far field excitation source file formatting. I cannot seem to generate a simple cos^q(theta) pattern file and need to get support from CST for this to see if they can supply someone with a cos^q(theta) pattern file. So, does anyone have (...)
Hello, I am simulating a reflectarray antenna in CST. I am feeding the reflectarray with a cos^q(theta) model feed pattern far field source using the I-solver. Problem is when i get the results for the far field, i get an error at the end of the solver run that says the radiated power is greater than the excitation power (accepted power), (...)
I using Raymond Thai's Thesis to do Image orientation but some how i m not getting the desired output. Can someone tell me if there is an error in the following code I=double(N); %loading the normalised image dx = blockproc(I,,@sample2); %sobel x-gradient dy = blockproc(I,,@sample3); %sobel y-gradient imview(I,); imview(
This is a question in the book to solve Heat Problem \frac{\partial \;u}{\partial\; t}=\frac{\partial^2 u}{\partial\; r^2}+\frac{1}{r}\frac{\partial\; u}{\partial\;r}+\frac{1}{r^2}\frac{\partial^2 u}{\partial \theta^2} With 0theta<2\pi, t>0. And u(1,\theta,t)=\sin(3\theta),\;u(r,\theta,0)=0 (...)
Hello! I used formulas for calculating AF (antenna factor), and after some trial and error get results that match measurements very well. For example, side beams angular position. To calculate approximate radiation pattern i must multiply AF by element pattern. I am unsure how this thing called. When element pattern can cancel out AF side beams, or
Sorry I do not have a paper reference. For me it is simple to straight develop circuits from written specs. Proposed circuit: 1. Use the square priniple of MOS 2. Because you use a bipolar (cos,sin) as input you need to bias two MOS for each cos or sin. The bias should be near subthreshold and the device should be (...)
hi, how to write a program forcalculating cos angle(cos theta) in 8051 assembly language thank you
In reflector antenna, usually we use horn as the feed. It has been checked that the radiation patterns of the horn can be simulated as a function: \cos^q (\theta) . The power q has been chosen at each frequency to fit the horn patterns. I already have the radiation gain pattern of one horn, I am wondering how to approx i
Dear all I need the result of this formula ∑(p-i)cos(iθ) , p is a constant, i is the index run from 1 to (p-1)
Are you using design compiler? If so check out... If you're not using design compiler. You can use a look up table. This is the ea
why do you want to generate a lookuptable for sine and cos function. because sine and cosine are the same functions with only a phaseshift of 90° you need only one LUT for both. -> sin(x) = cos(x+pi/2) Next sin (x) = - sin(X+pi) means you only need to store positive values of the (...)
Suggestions about building a digital sin/cos interpolator? Sinusoidal input from a sensor must be splitted by a factor N > 20; the output of interpolator must provide N pulses per sinus period. Can be built in a PIC18 or DSP?
Hi all, I have a question about something that I've never completely understood. It is about reactive power: When it is said that cos(phi) is, say, 0.7 (I just pick it from the air). Does it mean that the motor requires this phasedifference and doesn't work well if it doesn't get it, or does it mean that it pulls the phase between S and P to
how do i solve this integral? 1/(a+sin (t) +cos (t))
you can do it geometrically using two right triangles one of angle A and the other of angle B side by side and computing the sin(A +B ) od new TRIANGLE in terms of sine and cosines of A an B angles You can also find it with a VECTOR approach and a ROTATION and find the MATRIX of such rotation it comes from the fact that ROTATIONS are linear m
Hi, is it possible to get the discrete-time signal \cos(n) from the continuous-time signal \cos(t)? thnx purna!
Hi for ucos you can download its manual from micrium or ports to MIPS or ARM Salam Hossam
2cos(x)=e^jx +e^-jx 2jSin(x)=e^jx -e^-jx ∫ cos x dx = 1/2 ∫ e^jx dx +1/2 ∫ e^-jx dx = =1/2j e^jx - 1/2j e^-jx + C = Sin(x) + C Added after 1 hours 52 minutes: ∫ cos x dx = Sin(x) + C d/dx (Sin(x) + C) = ? d/dx Sin(x) = lim dx-->0 (1/dx) (Sin(x+dx) - (...)
I measure R,S,T phase cos phi on three phase systems . How can calculate avereging cos phi?.I need one cos phi value.But this value must be vectorial averege.... Regards...
I measure R,S,T phase cos phi on three phase systems . How can calculate avereging cos phi?.I need one cos phi value.But this value must be vectorial averege.... Regards...
Black Jack's code is an oscillator. It's not a sin(θ) or cos(θ) math function.
The most straightforward way is to make use of Euler's Formula. See Euler's formula - Wikipedia, the free encyclopedia Basically, we can decompose a cos into a sum of complex exponentials: \cos(w) = \frac{e^{iw}+ e^{-iw}}{2} So just plug in "x + iy" for "w" and find the real an
Hi... As we know Fresnel cos integral is ∫cos(?πx?)dx Fresnel Sin integral is ∫sin(?πx?)dx The integral boundaries are zero to x . (0-x) I want to establish these to matlab and Plot(C,S). I know that matlab already known C and S...However I want to reestablish by this way.Later (...)
Hi mujee, try replacing cos^2(phi) with cos(phi)^2
Can someone pls help me solve this problem. × = ln cos (xy) find dy/dx Thanks
hi all can u help me to design peripheral to increase cos pi until 0,9?? cause at my home, cos pi (power energy from supplier too low 0,67)????
hi all,i so weird that cst not support point sources as we could simulate large arrays(100*100),could cst have that? also how can i make wave guide with cos^4 pattern in cst?,in other word could i control the feed of waveguide if i use waveguide antenna and waveguide port? i listen to u regards
CORDIC algorithm is used to find sin/cos values in Hardware design. Often look up tables are also used. Kr, Avi
1. A wave is something that moves with time in space and this can be described with any function that satisfies f(z-vt) (shifted to the right by vt) or f(z+vt) (shifted to the left). So for example the function sin(z - vt) will propagate to the right with speed v as time t elapses. To see this plot it for some times t (choose v = 1 for example). Wh
i hav cos signal n i want to do down sample by this matlab code is correct ... n=1:20; x=cos(2*pi*n/10); y=zeros(1,60) for ii=1:20; y(3*ii)=x(ii) end figure; stem(n,x) figure stem(y) n1=1:20; N=1000; x1=cos(2*pi*n1/N) imp_train=zeros(1,50) imp_train(1)=1; (...)
hi deepa, try to create look up table for the sine and cosine values, for example sin 85= 0.996..try to create look up table for 0996 and access it using statemachine. Thank you
a DPCM scheme is used for encoding/decoding the massage m(t)=2sin(t)-cos(2t). write a Matlab code that wil perform this task. your result must include a list of the values and a plot of the input and reconstructed signals over the period (0,10)sec. u may select a sampling time of 0.1 sec
have a doubt reg checking DT periodic sequence: x=cos(pi* (n)^2 / 8 ) it is periodic ofcourse, but in the solution manual its fundamental period is mentioned as 8. but i got fundamental period=N=(2*pi/ omega ) in this case, N= (2*pi / (pi/8) ) = 16. does anybody know about how they getting N to be 8 ????
how to specify sin and cos terms in verilog??
can anyone plz tell me how to implent the look up table for sin and cos in verilog in detail......
Cordic just uses add&subtract according to algorithm.. There are special angle values.. By adding&subtracting those angle values accordingly, you get sin and cos of angle.. Pretty easy to implement trigonometric functions by CORDIC Good luck..
how we can implement trigonometric functions(sin & cos) by CORDIC......for example i want sin50=? how i can give the input angle 50 and how i can get the output it can be implemented in verilog using cordic...
As fa as I've understood your question, you can consider the fact that sin(x) is shifted 90deg with respect to cos(x) that means: cos(x) = sin(x+90deg) if your 32 samples are 1 period of the sinewave then they represent 360deg, from which 90deg are 32/4=8 samples so Vbeta = Valfa Vbeta = Valfa (...)
Hi to all, I need the theoretical expressions for the far-field radiated field of following antennas: - Ideal cos to nth power source. - Rectangular and circular patch antenna. Can anyone help me? Thank you so much.
Hi, plz the following matlab code calculate the sin & cos of an angle using cordic algorithm. Can you plz translate this using assembly language for Blackfin processor ai=; x=0.60725; y=0; r=pi/4; b=r; for k =0:14
Hi, if what you need is an oscillator, maybe your best solution is a coupled oscillator. It requires very few resources for any frequency. Basically, it is a second-order filter with the two poles in the unit circle. The poles may be very slightly out of the circle (use saturation arithmetic!). In that way, the aplitude is fixed for any freque
Hi All, I'm new in signal processing. I'm not even sure I have given an appropriate title to my question. So, I describe my problem and hope someone will point me a direction to go. I have a function: F(t)=a1cos2(wt+d1)+a2cos2(wt+d2)+...+ancos2(wt+dn[
Hello Dears Could you please tell me which one is better for implementation of "arc cos(x)" in VHDL?(Also, better for implementation on real hardware(FPGA)) 1_ Using Maclaurin series ( attached fig ). 2_ Using "CORDIC" method. 79271. Regards Mostafa
\cos(a \sin{x}) = J_0(a) + 2 \displaystyle\sum_{k=1}^{\infty} J_k(a)\cos(kx) J_k(x) is the Bessel function