Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
1. I designed it on Matlab simulink, after that, I use the Synphony tool for hardware design and created verilog code.
2. I also checked it on Matlab Simulink. the spectrum of OFDM is flat... not make a angle as viewing on spectrum analyzer.
I wonder maybe the number for FFT in spectrum...
Dear cwjcwj,
I tried, but the result I got is almost the same. I dont think that we should add the real and image component of OFDM signal before plotting spectrum ...
any idea to help me?
thanks very much,
I mean if I add 4 normal RV between -1 and 1, I cannot get a standard normal distribution ( mean of 0 and variance of 1).
>> a=rand(1,100000)*2-1;
>> b=rand(1,100000)*2-1;
>> c=rand(1,100000)*2-1;
>> d=rand(1,100000)*2-1;
>> x=a+b+c;
>> hist(x,100)
>> y=a+b+c+d;
>> figure
>> hist(y,100)
>>...
Yes. I did as you said.
No, I just plotted the spectrum of either Q or I component. should I add them before transfer to analog signal for spectrum analysis?
thank you
I know that we can get the gaussian approximation by central theory. However, in my question, why is three not four? I tried by matlab the four normal RV case (adding four normal RV) and using the histogram to plot the pdf of the sum. the result showed that not not the shape of gaussian RV. but...
Hi all,
I have trouble with spectrum visualization of OFDM signal.
I implemented OFDM system on Stratix II ES180 board and convert the Q-signal to analog via on-board DAC 14bit. I got the result like the figure I attached.
I wonder why the firs edge and end edge of spectrum is far away to...
Hi all,
I have a question related with statistic. I read some other website and they said that: "An easy way to approximate normal distribution is to add three random numbers:
G = X + X + X
X = a uniformly distributed random number between -1 and 1.
G ~ a standard normal random...
Hi all,
I am in trouble with ADC module. I try to code a very simple code:
module dac_test(
input clk,
output [13:0] dac
);
assign dac = 14'b11110001010110;
endmodule
with clk is 1Mhz clock and I mapped it into PIN_B15, and the 14bit data dac, I mapped it into 14 pin of U14. I sure that...
Hi all,
Is there any function in Matlab Simulink to generate burst error
noise or do I have to implement them myself?
I want to simulate the result when I perform interleaving algorithms. But AWGN in Simulink cannot generate burst errors so I cannot test the effective of interleaving. Anyone...
How about using a L,C element and placed it after one NOT gate? I thiink that will be ok, a L,C element play a role like delay line transmssion ? it is OK?
Thanks so much, but I want to simulate it first, what the software I should use? I found out that Proteus can not do it, may be a high frequency software?
thanks for your idea.
I have some questions, what is the kind of the line here, just normal line? How can I calculate the length of line to control the time delay ? or just do it and justify the length of the line to generate suitable pulse width? I want to simulate it first, what's the soft I...
Thanks for your advice.
I need generate the pulse with some addition information such: pulse rise <1.5ns, fall time < 1.5ns, pulse width 5 ns. PRI is about 10 micro seconds. I dont care about output impedance so much since I tend using a power amplifier following the pulse generator
Could you...
Thanks for four help. But it's quite not suitable, this IC only make the pulse with fmax=1Mz, I need the much higher this frequency...How can I solve this?
I want to generate a rectangular pulse with width from 2ns to 10ns (perfect 5ns). PRI is about 10 (micro-second)
The amplitude of the pulse is about 5v to 20v or depend, the amplitude is not importance.
How can I make them ?
Are there any IC do its requirement?
Thaks you all!
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
