AudioSDR

Version 1.10, uploaded March 29, 2021

A single Teensy Audio Library class object for a complete SDR (software-defined-radio) demodulator/processor.

• Creates a dual-conversion receiver with an IF at approx. 7kHz
• Contains demodulators for CW/SSB/AM/SAM and a WSPR mode
• Contains an impulse noise blanker, AGC, ALS (adaptive-least-squares) automatic notch/peak filters
• Contains demod mode dependent IF and audio band-pass filters
• Uses float32 processing throughout.
• Uses the I2S input and output on the Teensy Audio Board.

See the detailed description in the supplied pdf file

Changes from Version 1.01:

1. Fixed bug in AM & SAM demodulators that was causing severe audio distortion.
2. Modified PLL in SAM demodulator to improve carrier lock.