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29 Threads found on Ber Curves
The higher(Better) the SNR the Better the ber. You need know the type of modulation to be used, Bandwidth, the noise of the system etc... Look up "Link Budget", Sensitivity (Equation), Eb/No curves, and ber curves. SNR is one variable of several that determine what the likelihood of receiving Correct data is. (...)
Q1: Can anyone shows the SNR v.s ber curve of MB OFDM under(bit rate: 55.5M,80M,160M,200M,320M,480M...)in AWGN and multipath channel??? Q2: can some one tell me ,when works under the 200M,as standrad given the parameter (spreading rate=2),where should times the parameter???? is it after the IFFT block????? does anyone help plz!!!!!! tha
Hi, Can some one tell me what kinds of information we can get from ber curves? I know it puts bit error rate against signal power, but I see so many research papers where for e.g. cdma is compared against ofdma by just showing graphs but don't really tell the significance of comparison. thanks
Dear sir , I am trying to create a matlab model of HARQ ( all types) using LDPC (llr based) as fec . I wrote a code using matlab library (fec.ldpcenc-fec.ldpcdec) , but the ber curve is somehow different than the other literature works . Could you explain me what is wrong with my approach ,did i miss something (maybe sigm
Hi there, I am studying how bad is demodulation in case of not having a real match filter as the first block in the reception of the signal. do you know where could I find curves which take into account this error in the filter?? The only curve I found is the teoretical one and I guess, its behaviour is not the same Thanks in advance!!
anyone can help me with that ? It seems that there is some problem in simulation as you are getting 0 ber just after 1e-5. Just plot them on one graph using plot but it wont be a water fall curve.
hai there, im verifiying my QPSK architecture and quit confuse on whether to choose SNR or Eb/No in the AWGN block. is there any difference between SNR and Eb/No to obtain ber? what is the difference if there are?
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
Can anyone plz tell me or fwd me some literature on viterbi equilizer. I would appriciate if they also give some SNR vs ber curves. Thanks.
u need to get the ber curves and know the minimum SNR at the demodulator , and from the SNR , u can calculate the noise figure , of the system , by knowing the noise floor which depends on the channel BW khouly
Hi, could you be more specific what you want to do? Plot some ber-cuves for polarization diversity with different channel models? Or maybe something antenna related, simulate diversity gain etc?
I am trying to mimic the results in this paper, thus I expect the curves of MMSE and ZF equalizaiton to be worse than AWGN, while better than no equalization at all. However the tests I ran didnt make sense. here is the graph and scripts.. THanks in advance.
BPSK with Power Amplifiers or perfect timing, you will add a frequency offset to the received signal and determine performance in the presence of AWGN for SNR values of 20, 10, 5, 0 dB. The idea is to sweep the frequency range from 0 to fMAX which is the frequency at which ber is at or near 50%. Perform this task in small frequency increments
Hello, I am trying to plot the ber of BPSK, but it does not work correctly, I do not know why. I am using the following code: M=2; chan=rayleighchan(1/10000,100); tx=randint(50000,1,M); txSig=pskmod(tx,M); y=filter(chan,txSig); SNR=0:2:20; for n=1:length(SNR) rxSig=awgn(y,SNR(n)); rx=pskdemod(rxSig,M); [nErrors,BE
hi, i've graph in my simulation (ds cdma on urban channel ,ber versus Eb/N0) which is smooth and broken, i want to achieve theorical results by using a matlab functions to fit the graphe like the functions : smooth, berFIT. but the graph stay far from the theorical, please help me.
Hi , I implement an OFDM System with Simulink , by regular search i found that sent one , but when i run it to get ber Vs EbNo , it get high curves and values rather than expected to be. i use QPSK as modulation technique , so as i know the ber curve of OFDM must be the same as QPSK system , is that true , and if, what is the wrong in (...)
Hi, I am very new in wireless systems I have tried to simulate QAM on Rayleigh fading channel This is a mathematical model of Rayleigh fading channel y = hx + n where y = complex receive vector h = channel gain according to Rayleigh fading x = complex transmit vector n = complex AWGN noise I'm so confused about h Could anyone plea
Salam alikom H r u all?? I hope u r all fine. Well, I want to know which is better 2x2 or 3x3 or 4x4 MIMO receiver whether we used ML or sphere decoder detector?? I mean, is the performance improves with number of antennas increase or decrease (nxn MIMO systems) please help me with performance ber curves and reason behind ur answers (...)
Hi, I am simulating the fading effect of multipath in wireless communications. I am using a contributed model in opnet the model ID- 418, Any one used this before can you please answer my questions 1.I am getting a very high spike for an instance for the nearest node why it is so? 2. how can see the SNR and ber curves, which i cannot see now when
I use the following formula to generate noise in AWGN BPSK and QPSK , but it failed in QAM16,QAM256 Any suggestion , why it failed? Es = Rc * log2M*Eb σ2 = No/2 Rc : Coding rate =1 M : constellation points Es: energy per symbol Eb: energy per bit σ : Standard deviation No : noise spectral; Eb/No (BPSK) = 1/2σ2 Eb/No
EYECALC is an easy to use behavioral eye diagram simulator from EECALC. Free 30 day trial download. Features: * Dual Dirac capability, Pre-emphasis, Custom eye masks * ber calculation, Bathtub curves, Slicer level/phase, Jitter pp estimation * Impulse response, Mag, Group Delay * Export to Excel, Save to Clipboard, Save to Image Link: w
Any help will be useful Thanks
hi , does anyone have the simulation results for WCDMA downlink .... any results or curves are welcomed (like ber ,spectrum ...etc )
hi i want to do statistical eye diagram simulations and bathtub curves win Agilent ADS. their web help say i have to use the STATEYE sink component. i just can not find it in any of the palettes. license used: pb_si_designer_pro where and how to find it? it seems that if i open a "design guide" named signal_integrity > preemphasis_and_
the probability of error is dependent on the quantity Eb/No usually the dependence is erfc(Eb/No), as the argument of erfc() increases , the prob. of error decreases, thus we need either high Eb or low No. Eb/No is the SNR because Eb is the energy per bit for the clean signal and No is the noise PSD amplitude. The importance of Eb/No is thus of
Hello I am trying to see the performance of Viterbi decoder on different bit length data for certain range of Eb/No value(0 to 10 dB). I generate 1000 bits length data, encode it, pass it over AWGN, decode it and simulate the ber. I divide the same original 1000 bits length data into 2 (five hundred five hundred each) and did the same procedure.
Hi, Normally codes do have negative code gain at high ber (below some Eb/No). Look at the figure (I've picked up it from the web; i don't guarantee its accuracy, but it is qualitatively coorect). At ber=1e-5, code gain is about 0.5 dB. Code gain is 0 dB at ber=0.003, and at ber higher than that, code gain is negative. (...)
I want to simulate spread spectrum techniques and other coding techniques like cdma and get their ber to SNR curves in presence of jammers or other interfering signals.I want to test jammers of different specifications and test that if my transmitter and reciever are location "x" distance apart then how would be the transmission.. Can any body r
Dear all, I want to interface system level results (C/I) to link level results (Frame Erasure Rates), so I need some mapping tables and statistical link level results/ curves for GSM link level performance (ber vs. C/I and FER vs. ber). Does anybody have link level mapping tables ? Thanks.