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| author | Matthias P. Braendli <matthias.braendli@mpb.li> | 2017-08-09 15:18:56 +0200 |
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| committer | Matthias P. Braendli <matthias.braendli@mpb.li> | 2017-08-09 15:18:56 +0200 |
| commit | 143e624d14e63f918fcc802e1a54263043642cb6 (patch) | |
| tree | 4d061b979b49c90ec2d55d3f753faf7ec8d26b9f /dpd/README.md | |
| parent | e48f6b7078e9edc30b1a6a357e3f81c21265930a (diff) | |
| download | dabmod-143e624d14e63f918fcc802e1a54263043642cb6.tar.gz dabmod-143e624d14e63f918fcc802e1a54263043642cb6.tar.bz2 dabmod-143e624d14e63f918fcc802e1a54263043642cb6.zip | |
DPD: describe coef file format
Diffstat (limited to 'dpd/README.md')
| -rw-r--r-- | dpd/README.md | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/dpd/README.md b/dpd/README.md index 6c9d5fb..b5a6b81 100644 --- a/dpd/README.md +++ b/dpd/README.md @@ -37,6 +37,17 @@ See dpd/dpd.ini for an example. The DPD server port can be tested with the *dpd/show_spectrum.py* helper tool, which can also display a constellation diagram. +File format for coefficients +---------------------------- +The coef file contains the polynomial coefficients used in the predistorter. The file format is +very similar to the filtertaps file used in the FIR filter. It is a text-based format that can +easily be inspected and edited in a text editor. + +The first line contains the number of coefficients as an integer. The second and third lines contain +the real, respectively the imaginary parts of the first coefficient. Fourth and fifth lines give the +second coefficient, and so on. The file therefore contains 2xN + 1 lines if it contains N +coefficients. + TODO ---- |