TDMMtgMinutesMar0711 < P10761

P10761 Web>TDMMtgMinutesMar0711 (2016-01-24, ErnstChristen) (raw view)EditAttach
-- Main.JoachimHaase - 2011-03-07
---++ IEEE P1076.1 Working Group - Table-Driven Modeling Project - Telco Meeting Minutes of March 7, 2011

*Status:* approved on April 4, 2011<em><br /></em>

<br />%TOC%
---+++ Attendees
   * Ernst Christen
   * Joachim Haase (chair, meeting convener, note taker)
---+++ Agenda
   * Call to order
   * Volunteer fro minutes
   * Approval of agenda
   * Review and approve minutes from the last meeting
   * Discussion concerning action items on multidimensional interpolation
   * Discussion on further activities in phase 3 (definition of VHDL(-AMS) function headers) and phase 4 (reference implementation)
   * Next meeting
   * AOB
   * Adjourn
---+++ Call to order on March 7, 2011 at 8:05am PST (17:05 CET)

Joachim welcomes Ernst and starts presenting the [[%PUBURL%/%WEB%/ProjectTableDrivenModeling/1076.1_table_driven_modeling_2011_03_07.ppt][meeting slides]].
---+++ Volunteer for minutes

Joachim takes the notes.
---+++ Approval for agenda

Agenda unanimously approved.
---+++ Minutes from last meeting

Ernst agreed to approve the Minutes of the February 07, 2011 meeting.
---+++ Discussion concerning action items on multidimensional interpolation

Ernst has prepared material on multidimensional interpolation/extrapolation ([[%PUBURL%/%WEB%/ProjectTableDrivenModeling/interpolation.txt][txt]]). It describes the approach to handle the problem by a recursive call of functions. Data organization needs further investigation.

Joachim has prepared a test implementation v0.3 that includes multi-dimensional interpolation/extrapolation functionalty ([[%PUBURL%/%WEB%/ProjectTableDrivenModeling/tdm_v0.3.pdf][pdf]], [[%PUBURL%/%WEB%/ProjectTableDrivenModeling/tdm_v0.3.zip][zip]]).
---+++ Discussion on further activities in phase 3 (definition of VHDL(-AMS) function headers) and phase 4 (reference implementation)

Joachim: Phase 2 of the TDM activities is finished and the next steps can be started.

Joachim: Default interpolation and extrapolation methods should be part of the declaration of the interface of the function INTERPOLATION_ND. However, the associated arrays are unconstrained. At the moment, this is a problem.

Ernst: It should be checked whether VHDL 2008 allows to use the range of one argument of a function to declare the range of another one. In the case of generics this is possible.

Ernst: In a first step, given data for interpolation should be prepared for efficient interpolation and saved using special data types. There is always a trade-off between storage requirements and running time.

Joachim: The test implementation should at least define the algorithmic details. It should not fix the structures of the prepared data.

Ernst: Implementation dependent type declaration should be possible - similar to the declaration of the types INTEGER and REAL in the STANDARD package.

Ernst: Data type declaration for the test implementation needs further investigations.

Ernst: Characteristics (passivity, stability, and causality) of values and results in the one-dimensional complex-valued case should not be included in the interpolation functions.

Joachim: Rearrangement of given data can be done by the determination of the pp-forms in the one-dimensional case and re-sorting of data in the multi-dimensional case.
---+++ Next meeting

The next web meeting is planned on April 4, 2011 at 8am PST or 17:00 CEST.
---+++ AOB

None.
---+++ Adjourn

Joachim adjourns the meeting at 18:00 CET.
---+++ Action items

Ernst:
   * Check the possibilities to initialize unconstrained arrays in VHDL 2008.
   * Check the possibilities for data organization in the multidimensional case.

Joachim:
   * Proposal regarding the declaration of functions that prepare data for an efficient interpolation (pp-forms, re-sorting) and the associated interpolation functions.
Topic revision: r4 - 2016-01-24 - 01:54:47 - ErnstChristen
P10761