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What is the content of the cyclic prefix ?

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What is the content of the cyclic prefix ?
posted Dec 4, 2014 by Sridharan P

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In short it is the repetition of the end of the symbol
commented Dec 4, 2014 by Salil Agrawal
explain in detail?its contains repeated symbols only or any other data
commented Dec 4, 2014 by Sridharan P
Its repeat of end of symbol only, though it was used for OFDMA only initially but seems people started using the same for single carrier also.
commented Dec 4, 2014 by Salil Agrawal

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Best answer

Check the following image, should clear the doubt.

CP with end signal copied

answer Dec 4, 2014 by Salil Agrawal
yes.one symbol having (0.5/7 ms) and (15kHz) in that maximum we can send 15kHz means? how much Hz cyclic prefix can get?
commented Dec 4, 2014 by Sridharan P
I could not get you, can you ask in detail??
commented Dec 4, 2014 by Salil Agrawal
In normal cyclic prefix .In one slot we have 7 ofdm symbols.
7 ofdm symbols having 7cyclic prefix.
1 prefix having 160 samples others are 140 samples between data 2048 * 7samples.
my  question is samples are 0's and 1's?whether its true or false.
samples is nothing but symbols?
commented Dec 5, 2014 by Sridharan P
Symbol and samples are different, Please go through the following doc which describe in detail about the phy layer.
http://www.tsiwireless.com/docs/whitepapers/LTE%20in%20a%20Nutshell%20-%20Physical%20Layer.pdf
commented Dec 5, 2014 by Salil Agrawal
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