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208 Threads found on edaboard.com: Snr Ber
I have a problem with the slope of a ber in function of snr in a DVBT2 system.The slope is much bigger than it should be.What can be the problems? Thanks for your help
Good evening. I am simulating a MIMO channel, but I have a doubt about adding noise. I am measuring the ber vs EbNo, but Matlab function AWGN requests snr. I already know that snr = EbNo + 10log(spectral efficiency), but I don't know what spectral efficiency is while transmiting 4x4 mode with QPSK modulation in each channel. The whole (...)
If Setup and Hold times exceed designed wait times, errors can occur. But this is only one of a dozen or more mechanisms that can influence snr and ber. Many different algorithms to determine optimal settings or reliability have different tradeoffs for test time vs fault coverage. Adjacent cell, pattern dependent at full speed is one of ma
I've not used Altera SERDES, but designed many SERDES in the 70's (DS1 ber Test sets etc) 1) Normally bit clock VCO runs at 2f with quadrature 1f outputs, quadrature (90deg) 1clocks should be available. Pre-Comp, may help improve snr or jitter reduction, but watch out for ISI and group delay distortion. Plan on doing ber margin
Hi guys, i'm trying to simulate Multi-hop Relay cooperative communication using Quantize-and-Forward to find ber vs snr. The result isn't correct yet, and i'm really confused right now. I really need your help guys. Here's the Matlab code i've made (just try to run it on your Matlab): %ber vs snr for Direct and QF (...)
The demodulation is done with a PLL, but detection of phase error and frequency is determined by stability of frequency, modulation rate , snr, ber, cost all affect choices in design solutions. ideal "matched receiver" might look like the synch
Let's say that we have a random integer generator with sample time Tb/samples then we pass through modulation and we meet the awgn channel.We set it at snr mode.I need to understand how the given snr relates with signal power and the variables i ve already mentioned.How can i compute them properly in order to get the correct ber? (...)
Thanks. I have snr =32 for ber=0.01. Therefore I cannot achieve this capacity is that correct? what modulation scheme do you suggest ? That is good snr. Show details of eye pattern and schematic. Does your filter have ripple or group delay distortion , excess ISI? What is used for clock recovery? Comparato
These ratios are often optimized using matched filters. Shannon's Law determines the tradeoff for bit rate vs snr at a fixed ber. Bandwidth expansion or compression trades off power density efficiency and ber. Thus depending on your snr and noise threshold of receiver with sub-optimal filter and discrimination, your (...)
hi, im working with MIMO-OFDM i need a matlab code for 2x2 MIMO-OFDM . Please help me ,as soon as possible. thanks, Hamid BOUASSAM
a random Rayleigh flat-fading channel object based on Jake?s model is generated in MATLAB with sampling period of 10 μs and the maximum Doppler shift is set to 200 Hz. The additive white Gaussian noise with snr of 23 dB is used. The required ber is set to 10−3 and the average transmit power is fixed at 0.2 W. Two independent simula
i implemented simulink model when use bertool to plot ber vs snr at the end of process i have error like "Error evaluating 'StopFcn' callback of block_diagram 'untitled1'. Vectors must be the same lengths." please help me thank you
Please post matlab code for ber of ofdm with qpsk its urgent thank you in advance
i want compare ber performance of different modulation techniques using mutple antenna at tx and rx side, parameters will be number of antennas, number of carriers, type of channel used, number of pilots symbols, number of channel taps, start and stop of snr, modulation (...)
soft means temporary error after defined number of retries such as 4 or 16 etc.. hard means permanent error after defined number of retries and depending on system may or may not include error correction. ber vs snr curves shows probability of an error. Thus the length of the message affects message error rate which ca
The path loss equation is well known and there is a tradeoff with the Signal Bandwidth, snr and ber. In case you forgot or are just learning, for 1Km distance the IDEAL path loss neglecting moisture loss and fading loss ( deadspots from multipath cancellation) f (MHz) 1km 100m Path Loss (dB) 10 ...... 53 ... 33
ber is corresponding to snr, Sense=-174+10logBW+NF+snr. Say ber, then snr is fixed from math. So you can derive sense, or vice versa.
Hi, What is maximum data rate a wireless link can support using BPSK for 10^-6 ber (Bit Error Rate), Bandwidth of channel is 200KHz and snr is 21.335dB ? As per my understanding , Eb/No can be calculated for BPSK for a given ber using curves and value found is 11.29dB, and after that we can use relation Eb/No = S/N * W/R R comes out (...)
Where are your radio specs for Level, snr, ber , Channel characteristics, Environmental and power specs? What reasons for your choice of carrier or centre frequency, deviation ratio. Also complexity factor, size, interface & cost limitations were not given. These requirements ought to stated first, as they affect implementation greatly.
help in plotting simulink bpsk with rayleigh model output ber to snr curve
Can anyone pls tell me the relation or difference between snr, ber and ISI. I know the better the ber the lower the snr. its like they both are proportional right??? ISI is inter symbol interference. does this affect the ber or snr??? ber occurs when one of the many (...)
I wonder if ber vs snr (dB) can take a value greater than 1 ? when a ber can take a value greater than 1 ? I got a ber value of 2 at snr = -5dB ? is that acceptable by any mean or an error occurred?
Hi, can any one please help me to find the code of decode and forward strategy when using a relay station to transmit a signal from s1 to s2,in order to compare its snr and ber to no-relay transmission ones please. Purpose is to show that transmission via relay is better than the direct transmission. PLease help..:(
Respected Sir, Can u tell me matlab code for 'ber Vs snr using companding'. or How can we convert simulink model into matlab code? I have simulink model on the same topic.
For BPSK, the probability of error, ber = Q(sqrt(2Eb/No)) where Eb/No is the absolute snr per bit (not dB) and Q(X) is the common Q-function (area under Gaussian for x>X) Hope it helps
Hi I tried a simple OFDM program with punctured convolutional codes. But there is an issue in de-puncturing so my graph for snr vs ber is a flat response. My code is as below. Please help me out why im getting bad graph like this.. N = 10^3; snr_dB = ; M=4; for ii = 1:1:length(snr_dB) % (...)
Hi All, I performed a ber analysis for a frequency selective fading using MATLAB inbuilt function rayleighchan. But I am not sure , whether my result is correct. Please reply. I am attaching the output plot here. Legends: x-axis : snr in db y-axis: Probability of error.
Hi All I want to know what the difference between average snr per hop and end-to-end snr.
Hi Explorer123, You can find your answer by looking into the Shanon-Harley law (information Capacity theorem) or the Shanon's 3rd law. There are various modification we can bring to the equation mentioned to derive useful insights. It will also give information regarding the Shanon's limit too. You can find lots of articles as well as books in th
For particular QC-LDPC code and BCH code, you have observed the snr gap between the two codes from the simulation results. There is no need to know the theoretical snr gap between them. So, I guess that you are talking about the theoretical performance of an ensemble of QC-LDPC codes. In this case, you can obtain the average weight enumerator for a
relation between snr,ber & bandwidth in IDMA systems
i am currently creating a code where the signal vector will be segmented out to a certain amount of bits and i will add noise to it and demodulation and get the ber. But my ber vs snr plot graph looks very wierd to how a normal ber vs snr graph should look like. I would appreciate if someone can tell me what (...)
i want to draw this figure by matlab but i don't know this function that can help me. this figure 97189 if you have time, you can help me plot ber of OOK where ber OOK= Q(sqrt(snr)); thank so lot. here is book i will appreciate if you can help me, when yo
Hello. I have a system on Simulink where the channel has been constructed from scratch i.e not one of the channels in Simulink. I would like to know how I can measure ber and plot ber v/s snr without using bertool. Thank you.
sir, I have done a project on 'blind channel shortening for MIMO-OFDM systems using zero padding and eigen decomposition approach'. Can you please tell me what values of snr should be taken to get the values of ber for adding significance to the project. Please let me know the values of ber and snr for receivers.
Hello, everybody! I would be very appreciated if someone can help with Matlab codes of AF, DF and CC codes in Cooperative communications. The case is: 1 source, 1 relay and 1 destination. Need to compare ber vs snr plot of three relay techniques. Thanks a lot.:-D
hello, I'm looking for the relationship between Eb/N0 and Es/N0 in the case of OFDM with QPSK. And also the relationship ber vs. snr / bit curve for QPSK OFDM over AWGN Channel THANK YOU VERY MUCH
hello, I'm looking for the relationship between Eb/N0 and Es/N0 in the case of OFDM with QPSK. And also the relationship ber vs. snr / bit curve for QPSK OFDM over AWGN Channel THANK YOU VERY MUCH
Hello, I was wondering if I could get some help on implementing "cross layer protocol" or "UW(Underwater)-MAC protocol" in matlab? What kind of algorithm could I use? For example: Comparing ber and snr? Thank you
Hi all, I'm in dire need of the matlab code for ber of ofdm with MRC receiver over rayleigh fading channel for different modulation scheme such as BPSK, QPSK, M-QAM. If u have those, plz send to me: rkroyete@gmail.com. Thank u in advance.
Hi, I'm in dire need of the code for ber evaluation with BPSK,QPSK and M-QAM modulation for ofdm, if u have it plz send at
Hello everyone, So my task is to plot the ber Vs snr for the E8 lattice. The problem is, I don't know how to begin. Can anyone help me generate the E8 lattice out of the generating matrix? Many thanks in advance :)
Please sir, help me to have the matlap code for single-branch dual AF. P/S: Like in the paper "A Performance Study of Dual-Hop Transmissions With Fixed Gain Relays". 91939
Has anyone generated a rayleigh fading channel where there are two transmitters(T1,T2) and two receivers(R1,R2). The information from T1 is to be sent to R1 and information from T2 is to be sent to R2. What is the effect of interference of T1 over R2 in ber vs snr? Is there any MATLAB code for that? Please reply
hi I simulate an analog FFT in ADS(advance design system) Software by using CMOS current mirrors. every current mirror has an little error because of nonideal the mirrors. How I plot a curve that show FFT ber versus snr? nonideal the mirrors causes errors as mentioned above.
vl u pls mail me matlab code for snr Vs ber???
Is there anyone who can help me by providing the matlab codes for qpsk & bpsk modulation in riccian channel to find the ber vs snr ? Plz , it z too urgent
Please check matlab codes for bellow. MATLAB Source Codes -------------------------------------------------------------------------------- analemma, a program which evaluates the equation of time, a formula for the difference between the uniform 24 hour day and the actual position of the sun, based on a C program by Brian Tung. area
Hello, I am working on estimating wimax system using pilots, i applied the OFDM block and made the pilot insertion based on the block arrangement but the problem am facing is that the ber stays in its max. value it doesn't change with the snr . i have tryed the comb type with interp, the insertion in both time and freq with using interp2, but i h
% the code is without the addition of the cyclic prefix. the results is not as i am expecting, can anyone help please? clear all; N=24;% size of fft N1 = 6 ;% number of bits or symbols snr_db = ; % multiple Eb/N0 values snr= 10.^(snr_db./10); errors = zeros(1,length(snr_db)); %Transmitter d (...)