kaira.modulations.DQPSKDemodulator

Inheritance diagram for DQPSKDemodulator

class kaira.modulations.DQPSKDemodulator(*args: Any, **kwargs: Any)

Bases: DPSKDemodulator

Differential Quadrature Phase-Shift Keying (DQPSK) demodulator.

Methods

__init__	Initialize DQPSK Demodulator.
forward	Demodulate DPSK symbols.
reset_state	Reset any stateful components.

Attributes

bits_per_symbol

Number of bits per symbol.

property bits_per_symbol: int

Number of bits per symbol.

forward(y: Tensor, noise_var: float | Tensor | None = None, *args, **kwargs) → Tensor

Demodulate DPSK symbols.

Parameters:

• y – Received tensor of DPSK symbols with shape (…, N)

• noise_var – Noise variance for soft demodulation (optional)

• *args – Variable length argument list.

• **kwargs – Arbitrary keyword arguments.

Returns:

If noise_var is provided, returns LLRs; otherwise, returns hard bit decisions with shape (…, (N-1)*bits_per_symbol) because first symbol is reference

reset_state() → None

Reset any stateful components.

For demodulators with memory.

__init__(*args: Any, **kwargs: Any)

Initialize DQPSK Demodulator.