**NOTE: This list is not complete and is under construction.**
List of Signal Processing Toolbox functions:
- resample: Required for qlook, sar, and analysis processing. Used in data_pulse_compress.m, data_resample.m. Needs to be replaced by open source version of resample.m. See resample below.
- butter: Required for some operations. Used in hard-coded smoothing operations. Could be replaced by fir_dec and/or filter and re-implemented windowing functions to create filter coefficients.
- sgolayfilt: Required for sar processing. Used in SAR processor flight trajectory smoothing operations. Also used in some other hard-coded smoothing operations. Same comments as "butter". SAR code needs to be rewritten to avoid usage.
Implemented in the CReSIS toolbox to reduce the dependence on the Signal Processing Toolbox:
- boxcar
- tukeywin
- hanning
- chebwin
- medfilt1
## Resample
See [[https://github.com/terrygta/SignalResampler]]
