Lab 8.12 — GFSK BT and BER¶

Lab 8.12 — GFSK: BT, occupied bandwidth and discriminator BER¶

Goal¶

Build a continuous-phase GFSK link and study:

Gaussian pulse shaping and the BT bandwidth/time trade-off;
constant-envelope transmission and approximately 0 dB PAPR;
quadrature-discriminator decisions;
occupied bandwidth and BER versus Eb/N0;
differences from OFDM peak back-off and CSS processing gain.

Run¶

python blocks/block_08_modulation_and_synchronization/python/lab_8_12_gfsk_bt_ber.py

Artifacts¶

docs/assets/lab812_gfsk_bt_waveforms.png
docs/assets/lab812_gfsk_bandwidth.png
docs/assets/lab812_gfsk_ber.png
docs/assets/lab812_gfsk_metrics.json

Interpretation¶

Lower BT narrows the occupied spectrum but spreads transitions across more neighbouring symbols. GFSK keeps a constant envelope and is friendly to nonlinear transmitters, unlike OFDM, but its simple discriminator receiver pays a sensitivity penalty. The BER curve therefore reports actual decisions rather than inferring link quality from spectrum alone.