Module modulator 

Modulation and demodulation schemes (BPSK, QPSK, OQPSK, 8PSK, GMSK). Modulation and demodulation schemes.

Each submodule implements a modulation scheme with modulate() and demodulate() functions producing soft-decision LLRs.

Modules

bpsk

Binary Phase Shift Keying (1 bit/symbol). BPSK modulation and demodulation.

eight_psk

Gray-coded 8PSK (3 bits/symbol, CCSDS 131.2-B). Gray-coded 8PSK Modulation and Demodulation

gmsk

Gaussian Minimum Shift Keying (CCSDS 211.0). Gaussian Minimum Shift Keying (GMSK) Modulation

oqpsk

Offset QPSK (Proximity-1, CCSDS 211.0). Offset Quadrature Phase Shift Keying (OQPSK)

qpsk

Quadrature Phase Shift Keying (2 bits/symbol). QPSK modulation and demodulation.

Enums

Scheme

Modulation scheme selector.

Traits

Demodulator

Converts received symbols to soft-decision LLRs for the decoder.

Modulator

Maps coded bits to baseband symbols for transmission.

Functions

clamp_i16

Clamps a float to the i16 range (−32767..32767) and truncates.

noise_variance

Compute noise variance σ² from Eb/N₀ (in dB) and code rate.