redsea: Block error rate

It should be possible to optionally display the block error rate (BLER), i.e. percentage of erroneous blocks during the last n blocks or seconds.

There are two distinct definitions of BLER, depending on the time of calculation: either before (transmission BLER) or after error correction (decoding BLER). Decoding BLER is perhaps more useful for redsea users (?).

The BlockStream member block_has_errors_ is already nearly suitable for this, but for transmission BLER it would need to be able to count error-corrected blocks as well. This would also alter the criteria for sync drop. Whether this is a good thing needs to be tested.

The BLER value should not perhaps refer to a single group; otherwise it could only get one of the values 0, 25, 75, or 100 %. Instead, it should be an average over a dozen or so groups. This may be misleading though, since almost everything else in the JSON object refers to the group at hand.

About this issue

Original URL
State: closed
Created 7 years ago
Comments: 15 (10 by maintainers)

Commits related to this issue

implement Block Error Rate (#47, #42) — committed to windytan/redsea by windytan 7 years ago

Most upvoted comments

I can confirm that fixes it. Thank you!

{"bler":27,"callsign":"WJQB","group":"2A","pi":"0x6E0D","prog_type":"No PTY","radiotext":"HITS 106","rx_time":"Sun Mar 29 06:50:51 2020","tp":true}
{"bler":25,"callsign":"WJQB","debug":["TODO: Unimplemented ODA app 29555"],"group":"3A","open_data_app":{"app_name":"Enhanced early warning system","message":93,"oda_group":"12A"},"pi":"0x6E0D","prog_type":"No PTY","rx_time":"Sun Mar 29 06:50:51 2020","tp":true}
{"bler":29,"callsign":"WJQB","pi":"0x6E0D","rx_time":"Sun Mar 29 06:50:51 2020"}
{"bler":31,"callsign":"WJQB","pi":"0x6E0D","rx_time":"Sun Mar 29 06:50:51 2020"}
{"bler":31,"callsign":"WJQB","di":{"dynamic_pty":true},"group":"0A","is_music":true,"pi":"0x6E0D","prog_type":"No PTY","rx_time":"Sun Mar 29 06:50:52 2020","ta":false,"tp":true}
{"bler":31,"callsign":"WJQB","group":"2A","pi":"0x6E0D","prog_type":"No PTY","rx_time":"Sun Mar 29 06:50:52 2020","tp":true}
{"bler":33,"callsign":"WJQB","pi":"0x6E0D","rx_time":"Sun Mar 29 06:50:52 2020"}
{"bler":38,"callsign":"WJQB","group":"2A","pi":"0x6E0D","prog_type":"No PTY","radiotext":"HITS 106","rx_time":"Sun Mar 29 06:50:52 2020","tp":true}

ktb83 on Mar 29, 2020