bugGNU Octave - Bugs: bug #47233, [octave forge] (communications)...

 
 

bug #47233: [octave forge] (communications) convenc with initial state but no puncturing

Submitter:  None
Submitted:  Tue 23 Feb 2016 08:47:18 AM UTC
   
 
Category:  Octave Package Severity:  2 - Minor
Priority:  5 - Normal Item Group:  Incorrect Result
Status:  Invalid / Not an Octave Bug Assigned to:  None
Originator Name:  Emmanuel Chevalier Originator Email:  -email is unavailable-
Open/Closed:  * Closed Release:  * other
Operating System:  * Any Fixed Release:  None
Planned Release:  None
* Mandatory Fields

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Thu 27 Feb 2020 11:58:02 PM UTC, comment #2: 

No response to request for more information, closing as invalid.

Mike Miller <mtmiller>
Group Member
Tue 23 Feb 2016 07:17:24 PM UTC, comment #1: 

Hi, thanks for your bug report.

Can you try the following usage in your script instead, it does work for me:


[cbits fstate]=convenc(bitdiff,trellis,[],InitStateCode);


Notice the empty array placeholder for the 3rd argument. And you should have seen the warning about puncturing not yet implemented, this pointed out to me that something was wrong with your example.

Are you saying the usage you show works in Matlab, where the initial state is given as the 3rd input argument? If so, that is a simple bug in the argument handling.

Mike Miller <mtmiller>
Group Member
Tue 23 Feb 2016 08:47:18 AM UTC, original submission:  


communications package v1.2.1

run the script verif.
The last four results should be all equal to zero.
Instead 2 of them are equal to 1.

The test consists in convolutional encoding of the same bit sequence concatenated 3 times.

Although the encoder returns to it initial state after the single sequence encoding (i.e. 10), when encoding the concatenated sequence, the result is different from the concatenation of the single encoded sequence...

Anonymous

 

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Attached Files
file #36435:  data.dat added by None (7KiB - application/octet-stream - my first octave bug report, be indulgent)
file #36436:  verif.m added by None (524B - application/octet-stream - my first octave bug report, be indulgent)

 

Depends on the following items: None found

Items that depend on this one: None found

 

Carbon-Copy List
  • -email is unavailable- added by jwe (Updated the item)
  • -email is unavailable- added by None (Submitted the item)
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    Follow 15 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2020-02-27 mtmiller StatusNeed Info Invalid / Not an Octave Bug
        Assigned tomtmiller None
        Open/ClosedOpen Closed
    2017-08-13 jwe Summarycommunications package: convenc with initial state but no puncturing [octave forge] (communications) convenc with initial state but no puncturing
    2016-02-23 mtmiller Severity3 - Normal 2 - Minor
        StatusNone Need Info
        Assigned toNone mtmiller
        Release4.0.0 other
        Operating SystemMicrosoft Windows Any
        Summaryconvenc bug in communications package communications package: convenc with initial state but no puncturing
    2016-02-23 rik5 Carbon-CopyRemoved 72865 -
    2016-02-23 rik5 CategoryOctave Function Octave Package
        Summarybug convenc convenc bug in communications package
    2016-02-23 None Attached File- Added data.dat, #36435
        Attached File- Added verif.m, #36436

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