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what is short RACH in LTE(TDD)?

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what is short RACH in LTE(TDD)?
posted Aug 2, 2016 by Suchakravarthi Sripathi

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Preamble format 4 is known as short RACH of SRACH because of its short preamble sequence duration. It is transmitted on the UpPTS within the special sub-frame.
commented Aug 2, 2016 by Salil Agrawal
Hi... what do you meant by short preamble sequence ... how its varies from normal preamble sequence .. And why short RACH is needed in TDD even though it supports all other formats as FDD ... how its useful
commented Aug 2, 2016 by Suchakravarthi Sripathi
Check the following link it describes end to end in detail
http://www.sharetechnote.com/html/RACH_LTE.html
http://lteshare.blogspot.in/2013/12/rach.html

hope it will help.
commented Aug 2, 2016 by Salil Agrawal

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