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48 Threads found on Rectangular Pulse
I need help with the following question: Derive the expression for coefficients of Fourier series in exponential form for the sequence of rectangular pulses (with amplitude A, period T and duration θ) shown in this image: 136871 Derive the expression for signal power depending on the coeffi
SNR is defined as the signal power over noise power. For an AWGN with PSD N_0, the noise power is WN_0. So: SNR=P/(W\,N_0)=(P/W)/N_0=PT_b/N_0=E_b/N_0, PT_b=E_b, and W~1/T_b for rectangular pulse signal.
70% AND SQUARE WAVE is an OXYMORON. Anything not 50% is a rectangular pulse . using positive logic 0% is low 100% is high. the timer length reduces output frequency by n which is the total counts for Ton + Toff. Choose any value of n such as 1024.
Hello all, I am trying to understand sampling from the following: Suppose the channel impulse response is given by: h(\tau)=h\delta(\tau) and the transmitted signal is: s(t)=\sum_ks_kg(t-kT_s) where {s_k} are the transmitted symbols and g(t) is a rectangular pulse of duratuion Ts the sample time. The received
I want to give heated pulse input to a port of rectangular waveguide having a material (Dielectric block) placed in it for just a few neno seconds (ns), and want to see the heat pulse response of that dielectric block . I am facing problem in giving heat pulse input to a port 1. Help me in this regard, Thanks.
Hello all, I am trying to do something particular in MATLAB, which is very similar, but not the same as, transmitting a signal over ISI channel using SC-FDE. Suppose the transmitted signal is given by: s(t)=\sum_{k=-N_g}^{N_d-1}d_g\,g(t-kT_s) where g(t) is a rectangular pulse of duration Ts (the symbol duration), d_k are (bi
Hi , I had the following doubt in dtft of rectangular pulse : When we take fft of a rectangular pulse say h(n)=1 for n=0 to N-1. Then in some books i reffered give the dtft as sinc function only. But why don't they consider the exponential term with sinc function. 9834898349 Thanks and reg
Hi, I want to generate a rectangular pulse of the figure as attached. I tried various functions available in matlab(pulstran, rectpuls) and code available on the internet but could not produce it. The last code I tried- fs = 0.25; % sample freq D = '; % pulse delay times t = 0 : 1/fs :
(Im)pulse signals can have any form: from a Dirac pulse over the Gaussian bell curve, sine-, logarithmic- or exponential-shaped forms up to square (or rectangular) pulses. So the Gaussian p
Time shifted signals are very important in the analysis of LTI (linear time invariant) systems and in DSP. Usually you can decompose a complicated signal into basic time shifted signals. And analyze each signal and then apply superposition. For example a rectangular pulse can be represented by two shifted unit steps. Time shifted impulses (...)
Hello, I want to generate the following signal in MATLAB. How can I do that? s(t)=\sum_{n=0}^{N-1}s_nR(t-nT_s) where R(t) is a rectangular pulse of length Ts, and s_n are BPSK symbols Thanks
The duty cycle is defined as the ratio between the pulse duration and the period of a rectangular waveform In a monostable you only have the duration of the pulse but not the period so no duty cycle can be calculated. If for any reason the monostable is part of a bigger circuit and is trig
Hello everyone, I am searching for fast MOSFET to generate a single rectangular narrow pulse (+100V,-100V) with period (13ns - 50nSec variable). Load is 300pf capacitive. +/- 100V power supply lines are given. I am searching for fast MOSFETs and I came across STN4NF20L with Qg (Total Gate Charge) of 0.9 nC. However Qgs = 2.6nC and Qgd = 6.9 n
Hello, See it as a rectangular voltage pulse U with area = 1, now halve the duration. You will need to increase the heigth with factor two to maintain area = 1. As energy = integral(U^2*dt), the energy will double each time you halve the time duration. The power (U^2) will rise four times each time you halve the duration. When duration
Need a clever simple little circuit to generate a brief rectangular pulse, each cycle of a sine wave. Also need to be able to sweep the point at which this pulse starts (width can be fixed), on sine waves ranging between 5Hz and 50Hz. 69820 Can anyone direct me to such a circuit?
Yes, it would charge instantaneously. Start thinking in a rectangular pulse with duration "T" and amplitude 1/T. Plot how the C charges (towards the asymptot 1/T) and discharges towards the asymptot 0) with exponential shapes. Now make T more and more short. The amplitude will be more and more high. C will charge with more and more slope towards th
YoWinRFP is correct. You can control the reverse recovery time by controlling TT parameter of diode model. In SPICE you would not get the initial rectangular portion of reverse recovery wave shape, you will get mostly the triangular type shape.
Hi everyone! I am looking for a circuit which can transform from rectangular pulse into triangle pulse. Does any one help me. Thank a lot PS: The circuit must operate at 40KHz
Dear all How to find the phase difference between two rectangular pulse trains which has same frequency but different phase regards M Kalyansrinivas
if you want 10Mbps with rectangular pulse shaping, then choose Fs as 10MHz or so I think.
Hi, I'm using the DSP processor(C6713 ) for the first time and i cant find its c header file in CCS.Does anyone have it
Hi there, I have the following system x(t)-->| h(t) |---->y(t) where X(w) = 0.5rect(w/8000*pi) and H(w) = triangle(w/2000*pi). With this I'm trying to find the output frequency Y(w) but I dont know how to multiply these two together?.
for upconversion with rectangular pulse, I think the the carrier should be 2*0.5 MHz. What is your boss' view?
Hi! I am trying to study the effect of slew rate on the output of a buffer , for different values of frequency and amplitude (of the an input I use a rectangular pulse(Vpulse).Does anyone know which model of opamp I should use on Pspice ? I tried to use LM741 but I think it didn't work. Thank you
Hi there, I have been simulating a system in matlab. So Im not good with communication basics and im very new to it. Here is the problem. Im using rectpulse function from matlab, the it needs a sampling rate to generate rectpulse from random bits. So the sampling rate is calculated using, n=sampling frequency/bit rate,
Hi all, I m using matlab with a Data Acquisition Board. I must program with matlab signals to send them from the DAQ board to a sensor connected to it. This sensor must take 40 kHz. I figured such frequency can´t be generated with a normal M-File, so i must make a MEX-File with C/C++. Can someone help me with this. I don´t know how to start.
Thanks for pointing to this nice application note. I didn't expect a profound avalanche pulse generator design from this side. A delay line pulse generator, as utilized in this circuit, is an effective way to achieve rectangular pulses with an avalanche switch. For 200 V output voltage, you most likely need cascaded (...)
Hello, In the book Communication Systems for Haykin I read that if the pulses in pulse position modulation are ideal rectangular then the additive noise has no effect on the system. Why? Thanks in advance
clc; clear all; disp('M-Array ASK Modulation') %create a random digital message M=input ('M= '); %alphabet size x=randint(input('Number of binary bit stream = '),1,M); nsample=40; %oversampling rate. %% %% %use M-ASK modulation to produce y y=modulate(modem.qammod(M),x); %% %follow with rectangular pulse shaping. (...)
fc=2e9; fs = 20e9; % sample freq D = ' * 1e-9; % pulse delay times t = 0 : 1/fs : 2500/fs; % signal evaluation time w = 4e-9; % width of each pulse yp = pulstran(t,D,@rectpuls,w); if we plot this using will generate rectangular pulse train with amplite varying from 0
A short summary of the HP step recovery applications note could go like that: You can achieve a lot of really fast waveforms, but hardly a rectangular pulse... I basically share biff44's opinion, that a fast transistor switch, e.g. the said laser pulser, is a promising solution. The required 8-10 V however are restricting the available (...)
Hi, I am not sure, it is answer to your question, but doppler effect is here: but pulse: what pulse do you need? rectangular? or one freguency ? rectangular puls is not one frequency. May be try
Hi super, sinc(x) = sin(pi*x)/(pi*x) It is the Fourier transform of a rectangular pulse. Regards Z
usually it will be non-rectangular
These methods assume a rectangular pulse shape. They are not easily extendable to other pulse shapes( speaking of continous time sigma-delta ) What I need is a true jittered clock not a model of the effect of jitter Thanks
Ok, I located the example problem. Frankly, I dont understand your question. Are you speaking about Figure 3.7? The figure explains the effect of different fundamental period T of the rectangular pulse. If T = 4T1, meaning, the rectangle pulse lying in the origin extents from -2T1 to 2T1 and if T = 8T1, then same lies between -4T1 to 4T1. (...)
Hi your code is working perfectly, you can not see it clearly because the input impulses are too close to each other, I modified your code, run this x=round(rand(1,16)); xk=(-1).^x; % BPSK symbols xup=upsample(xk,300); x=round(rand(1,16)); a=sqrt(100)*firrcos(255,0.05,1,2,'rolloff','sqrt'); x_Tx=filter(a,1,xup); plot(x_Tx); If you
Hi.. As I understood your problem. You are saying that in texts authors always mention rectanglar pulse for analysis but in real world we would never use rectangular pulses. You are right after modulation we have pulse shaping block which shapes the pulse to make it compliant to spectrum. This (...)
The raised cosine filter is a matched filter for rectangular pulses. This means that it maximizes the signal to noise ratio at the center of the pulse. This shape should be split between the transmitter and receiver. This split makes square root raised cosine filters at each end.
This is what you do: you approximate the actual power pulse with a rectangular pulse having the same amplitude as your actual pulse and a width (length) such that the area is equal to that of the original pulse. For your exponential pulse, the equivalent rectangular power (...)
Help!!!! Need simplest circuit giving single "clean" regtangular pulse of about 1 sec when AC power switched on, transformerless powered.:?:
Hi enjoypercy, In the case of rectanguar shaped pulse (in time domain), the shape doesn'n respond to a raised-cosine function (in frequency domain). If symbol shape is rectangular in time then the spectrum is a sinc function in frequency. In this case, the matched filter (in baseband) has rectangular impulse response in (...)
pulse transformers A pulse transformer is a transformer that is optimised for transmitting rectangular electrical pulses (that is, pulses with fast rise and fall times and a constant amplitude). Small versions called signal types are used in digital logic and telecommunications circuits, often for matching (...)
Could anyone interpret the above statement for me ? Is that means, a rectangular pulse with width of a, and is centred at point a ? Please advice.
As mentioned earlier, this circuit does seem like an astable multivibrator that that gives out a rectangular waveform of certain duty cycle. The control of direction is done by the switch S1 that connects to the motor. As for your question of connecting it to a remote control, I don't find this circuit capable of it. It doesn't have any means of
i have thos [project and my dead line in two days pleas can any one help me for doing this project i could also understande my pro need it to be written in matlab Project 1.2. Consider a communication system that transmits a positive (negative) rectangular pulse with length T to represent 1 (0). Assume 1. p(1)=p(0)=1/2 and AWGN channel. 2.
i habve this project and i need to finshed it two days pleas can any one help it should be written in matlab Project 1.2. Consider a communication system that transmits a positive (negative) rectangular pulse with length T to represent 1 (0). Assume 1. p(1)=p(0)=1/2 and AWGN channel. 2. The capacitor is completely discharged before the arriva
Hello everyone, My question is mostly theoretical, regarding the CST excistation function : How does CST (or similar softwares) excite the model during a frequency sweep? Assuming my purpose is S-Parameters of the model, why is it excited with a rectangular pulse or Gaussian, and not with a Continuous Sine Wave ? Thanks al