|Subject:||[Discuss-gnuradio] BER measurement for GMSK transmission with USRP wirelessly|
|Date:||Fri, 4 Jul 2014 16:18:43 +0800|
Good day everyone,
My sincere apology in advance if this question has been asked before, but i tried search thru the archives but to no avail.
Currently, I am trying to calculate the BER for GMSK, But first I started off on a perfect channel without USRP.
My current block diagram is as follows:
0s and 1s, 10^6 windows -> "Throttle" -> "GMSK Mod (default settings)" -> "GMSK Demod (default settings)" -> "Error Rate Block"
I am feeding in "Error Rate block" with the random source and the "GMSK Demod" Output.
I am getting BER of 50%... Anyone knows what is wrong?
In fact, I saved the input and output as binary files. I found out that they are not very identical especially in terms of binary length. I tried input 9 bits of binary and I obtained 63 bits from the GMSK Demod Output.
Is there something that is missing?
Hope someone can advise me. Thank you :)
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