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doubt in finding data rate

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wireless New Member Posts: 4	doubt in finding data rate Mar 10, 2011 11:55:12 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by wireless on Mar 10, 2011 11:55:12 GMT -5 hey guys i'm confused with data rate and bandwidth. how can one know the data rate that he can achieve with the bandwidth what he got. plz explain with the given info bandwidth=28Mhz modulation =qpsk

charan langton
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doubt in finding data rate Mar 13, 2011 2:44:47 GMT -5

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Post by charan langton on Mar 13, 2011 2:44:47 GMT -5

The number of symbols one can transmit in 28 Mhz is equal to

28/1.25 = 22.4 Msymbols/sec

- the factor .25 is the roll-off factor of a RRC pulse shape which is assumed to shape the square pulses.

Since QPSK has 2 bits per symbol, we get 44.8 Mbits/sec

Charan Langton