Modulation¶

Classes¶

class sdr.PSK

Implements phase-shift keying (PSK) modulation and demodulation.

Pulse shaping¶

sdr.gaussian(time_bandwidth: float, span: int, sps: int) → ndarray

Returns a Gaussian pulse shape.

sdr.raised_cosine(alpha: float, span: int, sps: int) → ndarray

Returns a raised cosine (RC) pulse shape.

sdr.root_raised_cosine(alpha: float, span: int, sps: int) → ndarray

Returns a square root raised cosine (SRRC) pulse shape.

Symbol mapping¶

sdr.binary_code(n: int) → ndarray

Generates a binary code of length \(2^n\).

sdr.gray_code(n: int) → ndarray

Generates a Gray code of length \(2^n\).

Symbol encoding¶

sdr.diff_decode(y: ArrayLike, y_prev: int = 0) → ndarray

Differentially decodes the input data \(y[k]\).

sdr.diff_encode(x: ArrayLike, y_prev: int = 0) → ndarray

Differentially encodes the input data \(x[k]\).