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From: | sumit kumar |
Subject: | [Discuss-gnuradio] 802.15.4 Frame sync confusion |
Date: | Wed, 18 Oct 2017 14:24:11 +0200 |
If my understanding is correct, most of the 802.15.4 receiver implementations perform frame synchronization i.e. find the start of the frame using the preambles which are nothing but 8 zeros(each of which is further converted to 32 bit chip).
This is done after the OQPSK symbols (complex samples) are already decoded to bits. Same does the gr-ieee 802.15.4
I was wondering why 802.15.4 does not do frame sync using the complex samples itself like WiFi do using STS ?
I mean, it already has a pattern of 8 repeated zeros and hence a repeated sequence of complex samples in the beginning of every frame.
What I am missing here ?
Regards
Sumit
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