OSTBC and Alamouti - BER Curve

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itengineer79

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Great Day to all...

Kindly I'm facing a problem with OSTBC simulation that I got (-2dB )to (-3dB ) different than the original on all ranges of the curve of BER with SNR for all OSTBC and all modulation types.

For example when I have QPSK- Alamouti 2Tx with 2Rx, in 10^-2 it is 4.6dB while should be 6.6dB or near that number.

Can I get your comments, or what is the factor that should multiply the code to enhance the results.

Thank you

Regards
 

watch your channel and transmitted symbols normalization. Have a look ont this website...dspblog.com
 

Thank you for reply ..

Yes, u r right that the first thing i did ..
But I dont use any factor or normalization or anything ..just multiplies the channel with 1/sqr(2)
That is all.

Thank you again
 

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