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74 Threads found on edaboard.com: Ber Qpsk

I am designing a channel encoder (BCH/RS/Turbo) + Modulator based digital communication system in simulink. My blocks in the design are 1) ber. B. Gen/Ran Int Gen 2) BCH (15,7) or RS (255,223) Encoder & Decoder 3) qpsk/M-ary PSK Mod & De Mod 4) AWGN Channel the problem i am facing is the input to the modulator/demodulator should be in

EbNO for MIMO systems

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 system eff

BER vs. SNR / bit curve for QPSK OFDM over AWGN Channel

Please post matlab code for ber of ofdm with qpsk its urgent thank you in advance

[help] where can i find mathematical proof for the BER of QPSK?

for the qpsk 4 phase shift key the bit error rate is this: 111407 where can i find proof for this term? i tried to search the book Carlson Communication systems and found nothing

maximum data rate a wireless link can support using BPSK for given BER and SNR?

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 to be ar

OFDM transceiver with rayleigh channel using Standard PDP in matlab

I have built an OFDM transceiver with rayleigh channel using standard PDP's Like EPA,EVA and ETU.The problem is I am getting very high ber even for BPSK i.e 50-60 % or higher bits in error.Scatterplotting confirms OFDM transceiver blocks include: ---- Random Data -- Modulation(BPSK,qpsk,QAM) -- Serial2Parallel -- IFFT -- CyclicPrefix >>>

how to implement qpsk in mimo system, and increase receive and transmit antennas

1) how can i alter this code in order to plot it in qpsk ber modulation? 2) how can i alter this code if i wanted to do 3x3? % Script for computing the ber for BPSK modulation in a % Rayleigh fading channel with 2 Tx, 2Rx MIMO channel % Zero Forcing equalization clear N = 10^5; % number of bits or symbols (...)

wat is O-QPSK modulation .

Hi karthigowri. O-qpsk: stand for Offset Quadrature Phase Shift Keying. the advantage of this type is, the maximum phase shift provide by o-qpsk is 90 degree which will reduce the distortion in the receiver side leading to low ber. For further clarification there are many articles related to this topic is available in internet. Hope it may (...)

matlab code for wcdma bit error rate simulation at any data rate over awgn channel

Looking for a matlab code for ber simulation in wcdma over awgn channel, the code computes ber for a given data rate using qpsk modulation and a pulse shaping filter

simulink model of CDSK and QCSK

I am a PhD student, I work on digital modulations (CSK, DCSK, CDSK, qpsk, BPSK, QCSK ...), I work mostly on digital modulations based on chaos. However I am in blocking state for more than ten days in my work, I can not get a good ber in my simulation of CDSK modulation. for information, i work with simulink and matlab. Can you help me if you like

ber plot for qpsk in rayleigh channel changes every time I simulate

Plot of ber vs ebno for qpsk in rayleigh channel using the object rayleighchan changes for each simulation. Why does this happen? My code is as follows: % Create Rayleigh fading channel object. chan = rayleighchan(1/10000,0); % Generate data and apply fading channel. M = 4; % qpsk modulation order hMod = modem.pskmod('M', (...)

QPSK modulation for cooperative communications

hi, i had done plot graph ber cooperative communications with using QAF (Quantize-Amplify and forward) protocol..i use bpsk modulation and 4 level quantization..please tell me how to use qpsk modulation with 16 level quantization..the matlab code as below..actually i dont know this code right or not, so please correct and help me..thank you c

relationship between Eb/N0 and Es/N0 in the case of OFDM with QPSK.

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

BER vs. SNR / bit curve for QPSK OFDM over AWGN Channel

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

Matlab code for BER Vs SNR curve for BPSK, QPSK and M- QAM of OFDM with MRC receiver

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.

BER Vs SNR curve for BPSK and M- QAM of OFDM

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

BER for QPSK in OFDM with Rayleigh multipath channel

Hello, with simulation ber for BPSK in OFDM with Rayleigh multipath channel, i have resultats : 92497 can you explain is correct this simulation parametres are : FFT size. nFFT 64 Number of used subcarriers. nDSC 52 FFT Sampling frequency 20MHz Subcarrier spacing 312.5kHz Used subcarrier index {-26

Matlab code for rician fading channel

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

EbNo BER problem in noise channel model

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

adding noise to qpsk signal in ADS

dear all, i want to measure the ber of qpsk in presence of noise, i have used system level blocks for qpsk modulator, amplifier and attenuator and simulated using circuit envelope. i have used the ber_qpsk() function to plot the ber vs Eb/No plot, which gives me an ideal curve, now i want to (...)