Hi Eitan, it's been a while since I've looked into IEEE802.16, but that's a very regular OFDM system, isn't it, with a fixed OFDM symbol as short preamble (for the downlink bursts), and a 2-symbol preamble for the start of frame?
A simple correlation detector might do in that case; a bit nicer on the acquisition speed per computational effort might be a fixed-length correlator that detects the position of cyclic prefixes and could be applied to a whole burst or even frame to get a good timing estimate before you start decoding OFDM symbols. Best regards, Marcus PS: Your email signature is kinda funny on a publicly archived mailing list :D On Wed, 2019-11-20 at 14:43 +0200, Eitan Hetzroni wrote: > Hi, > any solution to the reception (rx) or tx of wimax using gnuradio? > could not find any proper chain that finds the preamble. > > The information transmitted is intended only for the person or entity to > which it is addressed and may contain confidential and/or privileged > material. Any review, retransmission, dissemination or other use of, or > taking of any action in reliance upon, this information by persons or > entities other than the intended recipient is prohibited. If you received > this in error, please contact the sender and delete all copies of the message.
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