I need approximation expression of symbol error rate for BPSK, QPSK, QAM and FSK over AWGN and Fast Fading Rayleigh Channel.
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Hi,
Here in part II you can find closed-form expressions you need:
https://books.google.be/books?id=OYrDN0Q6BacC&printsec=frontcover&dq=fading+channels&hl=en&sa=X&ei=hsonVa-BNIjUOIrCgJAL&redir_esc=y#v=onepage&q=fading%20channels&f=false
Maybe this book can help you:
"Wireless communications" Andrea Goldsmith.
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