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208 Threads found on 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