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Its not a problem.. ucan use higer code rate for convolutional coding like 2/3,5/6 etc... and so also in viterbi decoding....
see 802.16d standard on this forum... its explaination is there...
hi the_emperor_966..
The CP should always greater than channel impulse respose and in reply also he said exactly this.probably you have noticed it wrong...
nways...thankx 2 the link u provided ..it clerifies my doubt also...
however.. plz see this link on dsprelated.. it clerifies more...
i have also one doubt...
as per theory... by adding CP we are making OFDM symbol periodic so that we can apply the property:Convolution in time doman= multiplication in frequency domain in Channel Equazation part ,which is valid only for Circular convulation.
but if you consider multiple OFDM...
thankx 4 ur reply... but my doubt is :why data becomes small in only subchannelization case... and moreover will it happen every time as soon as subchannelization comes into picture???
plz help.....
Hi frnds...
i have one doubt regarding subchannelization. As per standard, Read-soloman(RS) coding/decoding is not employed whenever Subchannelizetion occurs....
Can anybody plz explain why it is so????
Frnds.. plz have a look on this attachment.This is from 8021.6d Wimax pdf in which some OFDM Formulae are given.
Can anybody plz explain how these formulae are derived?? Specially First and second formula.
It will be a gr8 help for me......
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