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Bug #4373

closed

OsmoTRX calculates relatively lower C/I values for EDGE/8-PSK bursts (compared to GMSK)

Added by pespin about 4 years ago. Updated about 3 years ago.

Status:
Resolved
Priority:
Normal
Assignee:
fixeria
Category:
-
Target version:
-
Start date:
01/22/2020
Due date:
% Done:

100%

Spec Reference:

Description

From fixeria in #3995:

an issue observed by Fairwaves: OsmoTRX calculates relatively lower C/I values for EDGE/8-PSK bursts (compared to GMSK). Please see an attached patch that has never been submitted to the mainstream, but I believe it should fix the problem.

Files

compute_edge_ci.diff compute_edge_ci.diff 3.36 KB pespin, 01/22/2020 01:29 PM

Related issues

Related to OsmoPCU - Bug #3395: Uplink CS/MCS control is broken osmo-pcu is used with osmo-bts-trx/osmo-trxResolvedpespin07/14/2018

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Related to OsmoPCU - Bug #1833: UPLINK MCS gets reduced from MCS9->MCS6 when good radio condition existsResolvedarvind.sirsikar10/25/2016

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 #1

Updated by pespin about 4 years ago

  • Related to Bug #3395: Uplink CS/MCS control is broken osmo-pcu is used with osmo-bts-trx/osmo-trx added
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 #2

Updated by pespin about 4 years ago

  • Related to Bug #1833: UPLINK MCS gets reduced from MCS9->MCS6 when good radio condition exists added
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 #3

Updated by fixeria about 3 years ago

  • Assignee changed from pespin to fixeria
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 #4

Updated by fixeria about 3 years ago

  • Status changed from New to In Progress
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 #5

Updated by fixeria about 3 years ago

  • Status changed from In Progress to Feedback
  • % Done changed from 0 to 80

After some testing without and with this patch applied, I can see a significant improvement of reported C/I values:

https://gerrit.osmocom.org/c/osmo-trx/+/22714 sigProcLib: fix C/I computation for 8-PSK modulated bursts

Once it's merged, we can close this ticket.

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 #6

Updated by fixeria about 3 years ago

  • Status changed from Feedback to Resolved
  • % Done changed from 80 to 100

Approved and merged. \o/

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