Bursty communication Synchronization

Hello,

Synchronization blocks in GNU Radio are feedback based e.g FLL, PFB
clock
Synch,M&M Synch.
Control loop takes some time to minimize the error e.g “benchmark_rx.py”
takes 200+ symbols time
for FLL and PFB clock synch to lock.
In some bursty communication where we have to transmit only 1500-2000
symbols, loosing initial 200 symbols means large no of errors.
i need to ask that what can be the possible solutions?

Thanks,
Adeel

On Sun, Nov 20, 2011 at 11:47 PM, adeel anwar [email protected]
wrote:

Hello,

Synchronization blocks in GNU Radio are feedback based e.g FLL, PFB clock
Synch,M&M Synch.
Control loop takes some time to minimize the error e.g “benchmark_rx.py”
takes 200+ symbols time
for FLL and PFB clock synch to lock.
In some bursty communication where we have to transmit only 1500-2000
symbols, loosing initial 200 symbols means large no of errors.
i need to ask that what can be the possible solutions?

Generally the synchronizers should converge faster than that,
especially for high SNR. 200 symbols is a very long time. Try tuning
the loop more aggressively, or reducing the maximum deviation. Very
short preambles (or very tight SNR requirements) may require a custom
data-aided synchronization algorithm.

–n

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