Feature #2154
closed
Integrate IMBE decoding into decoder block.
Added by about 7 years ago.
Updated about 7 years ago.
Description
Real-time decoding of IMBE frames with audio output from block.
As of rev. 160 the decoder is available and can be selected by setting the environment variable "IMBE" to "soft" before starting the receiver. There is a problem in that the IMBE output is 'choppy' unless allowed to run at full speed (i.e. with no throttling). I think the forecast method is also a problem and this needs further investigation.
- Status changed from New to Resolved
- Resolution set to fixed
Final change needed was to make forecast() work properly and then integrate into usrp_p25_rx.py. The block input is (at present) dibit symbols at 4800 symbols/s and the output is mono audio at 8000 samples/s. Thus forecast can determine the correct forecast for input as being 3/5 of the number of output samples required.
- Project changed from OP25j to OP25
- Status changed from Resolved to Closed
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