Creates a new OQPSK object.

Parameters:¶

phase_offset: float = 45¶

The absolute phase offset \(\phi\) in degrees.

symbol_labels: 'bin' | 'gray' | ArrayLike = 'gray'¶

The decimal symbol labels of consecutive complex symbols.

• "bin": The symbols are binary-coded. Adjacent symbols may differ by more than one bit.

• "gray": The symbols are Gray-coded. Adjacent symbols only differ by one bit.

• npt.ArrayLike: An \(4\)-length array whose indices are the default symbol labels and whose values are the new symbol labels. The default symbol labels are \(0\) to \(4-1\) for phases starting at \(1 + 0j\) and going counter-clockwise around the unit circle.

sps: int = 8¶

The number of samples per symbol \(f_s / f_{sym}\).

pulse_shape: ArrayLike | 'rect' | 'rc' | 'srrc' = 'rect'¶

The pulse shape \(h[n]\) of the modulated signal.

• npt.ArrayLike: A custom pulse shape. It is important that sps matches the design of the pulse shape. See Pulse shaping.

• "rect": Rectangular pulse shape.

• "rc": Raised cosine pulse shape.

• "srrc": Square-root raised cosine pulse shape.

span: int | None = None¶

The span of the pulse shape in symbols. This is only used if pulse_shape is a string. If None, 1 is used for "rect" and 10 is used for "rc" and "srrc".

alpha: float | None = None¶

The roll-off factor of the pulse shape. If None, 0.2 is used for "rc" and "srrc".