MattSR
Member
Hi Guys,
Since theres a few signal processing gurus here I thought I'd ask this in an open forum. I'm reading the DMR specs and the DSD source code to understand how MotoTRBO works. From what I've seen, the frame sync is in the middle of the packets - unlike say P25 where its at the start.
My question is this:- How does the radio decode the first half of the first frame received if the demodulator isn't "trained" to the symbols and decision points? I under P25 well, and it makes sense the FS is at the start of a field since that trains the receiver for the incoming stream of symbols, but how is this achieved in TDMA systems? What am I missing?
Regards,
Matt
Since theres a few signal processing gurus here I thought I'd ask this in an open forum. I'm reading the DMR specs and the DSD source code to understand how MotoTRBO works. From what I've seen, the frame sync is in the middle of the packets - unlike say P25 where its at the start.
My question is this:- How does the radio decode the first half of the first frame received if the demodulator isn't "trained" to the symbols and decision points? I under P25 well, and it makes sense the FS is at the start of a field since that trains the receiver for the incoming stream of symbols, but how is this achieved in TDMA systems? What am I missing?
Regards,
Matt