Make sure all the librtlsdr DLL files (librtlsdr.dll, libusb-1.0.dll) are in your system path, or the same folder as this README file. Also make sure you have all of their dependencies (e.g.

Measuring the performance of antennas in absolute terms that can involve a lot of expensive equipment and specialized facilities. For practical applications, especially when building antennas, ...

psk_raspi.py : 変調方式に pi/2 shift BPSK, pi/4 shift QPSK, OQPSK を追加しました． sdr_transmitter_raspy.py : psk_raspi.py の変更に合わせました． readme.md / readme_JP.md : 記述の見直しと変調方式の追加に合わせて更新しました． ...