Hi,
The 32bit win version does not have the "12-bit IQ DAC amplitude" experimental option, I assume this was not ported for this reason?
I would be interested to test the 12bit Dac version in windows. (Improvement by using 9-bit sin/cos tables generating the baseband signal?)
I notice you have changed the gain setting (iq_gain) for the satellites to 100 for this and only 18 for the 16bit IQ dac section of your baseband generation code.
Your comments in the unix/c build state this was for:
/*
- Uncomment to use only 12Bit DAC LUT with high antenna gain.
- By default use 16Bit DAC LUT with low antenna gain.
- Full DAC dynamic range -> Better SNR and signal quality, faster 3D lock.
*/
As a matter of interest, the default ADALM PLuto antenna - [Jinchang Electron - JCG401]https://wiki.analog.com/_media/university/tools/pluto/users/jcg401.pdf)
and review here: https://ez.analog.com/thread/100485-adalm-pluto-antenna-performance
Is this the antenna you used when testing the IQ for 12 vs 16 ? Did the 12bit work better on the generic Jinchang antenna?
I have seen a suggestion to use this antenna: https://www.adafruit.com/product/1858 - any suggestions?
Missing in your Readme from the original gps-sdr-sim repository is the mention of the correct coupling method to devices. Might be handy to include this for other Pluto enthusiasts?
Transmitting the samples
The TX port of a particular SDR platform is connected to the GPS receiver under test through a DC block and a fixed 50-60dB attenuator.