[SOLVED] QPSK Data rate Question

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rawanayyoub

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Hi all,
Please I need to ask what's the data rate of QPSK signal ??? its bit rate or the symbol rate , in my system I use 20k Hz as frequency of bit in each branch I and Q branches , then if I faced Question about the Data Rate of my system which the answer 20K Hz or 40K Hz , and this values related to symbol rate or bit rate ?????? Please I need help at this situation so badly.

Thanks in advance,
Rawan Ayyoub
 

cntube said:
20ksymbols/s and 40 kbps
Click to expand...

and has nothing to do with I/Q channels, other then the required bandwidth of each I and Q channel is half the full RF channel bandwidth required to carry the modulation.

The reason for I/Q channels require half the bandwidth is, math-wise, because they contain negative and positive frequency, or more specifically negative and positive relative phase relationships between the I/Q channels.
 
Thanks all for replay, for more clearly to me , Please
20ksymbols/s and 40 kbps
Click to expand...
from your answer Data rate is the bit rate and these two formula according to it, this correct or no ??!!

With My deepest thanks,
Rawan Ayyoub
 

Data rate is the speed at which data are transmitted. It is measured in bits/second.
Symbol rate is related to data rate and the method of modulaton. It is measured in symbols/second.
Regards

Z
 

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