BER of OFDM in rayleigh enviroment using BPSK modulation

script utilizing communication toolbox functions.

Description

the results i.e theoretical and simulated are in good agreement with each other...communication toolbox is very handy

• Required Products: Communications System Toolbox
• MATLAB release: MATLAB 7.9 (2009b)

[Huy Nguyen]

Hi Mohammad,

Thanks alot for your code.

I'm trying to simulate for BER of OFDM in rayleigh fading using BPSK and M-QAM. It's working fine with AWGN. When I applied the rayleigh function as your code, its working only with BPSK and QPSK....not for other M-QAM.

Please give me an idea!

Many thanks.

[Imran]

Huy,
Hope this answer is not too late.
The modulation object in the program uses modem.pskmod (see line 15 in program). You need to change it modem.qammod, if you want to carry out M-QAM simulation with this program.

[Luís Miguel]

Why OFDM RAYLEIGH is equal to the BPSK RAYLEIGH , should not it be better?

please help me

[Mohammad Tahir]

Because we have assumed ideal channel estimation in this case and the improvement of OFDM over BPSK rayleigh will be seen when we have imperfect channel equalization of frequency selective channel which cause ISI at the receiver. (please ignore the first one due to typo)

[Tewodros Hassen]

what are the terms: 10log10(52/64) and 10log10(64/80) and the minus term in the snr definition?

Rgs,

[Kei]

Hi,
Your code specifies sample time is 1/10000 in rayleighchan. However, I think the sample time of the code is 1/80. Is my understanding wrong?

> h=rayleighchan(1/10000,10);

Kei