Saleh Power Amplifier¶

Model of a power amplifier according to Saleh[1]. Implements a saturation characteristic according to

\[s'(t) = s(t) \cdot A\lbrace s(t) \rbrace e^{\mathrm{j} \Phi\lbrace s(t) \rbrace}\]

where

\[A\lbrace s \rbrace = \frac{ \alpha_\mathrm{a} \frac{|s|}{s_\mathrm{sat}} } { 1 + \beta_\mathrm{a} \frac{|s|^2}{s_\mathrm{sat}^2} }\]

describes the amplitude model depending on two parameters \(\alpha_\mathrm{a}, \beta_\mathrm{a} \in \mathbb{R}_{+}\) and

\[\Phi\lbrace s \rbrace = \frac{ \alpha_\Phi \frac{|s|}{s_\mathrm{sat}} } { 1 + \beta_\Phi \frac{|s|^2}{s_\mathrm{sat}^2} }\]

describes the phase model depending on \(\alpha_\Phi, \beta_\Phi \in \mathbb{R}\), respectively.

class SalehPowerAmplifier(amplitude_alpha, amplitude_beta, phase_alpha, phase_beta, **kwargs)[source]¶

Model of a power amplifier according to Saleh.

See Saleh[1] for further details.

Parameters:

model(input_signal)[source]¶

Model signal amplification characteristics.

Parameters:: input_signal (np.ndarray) – Sample vector of the signal feeding into the power amplifier.
Returns:: Distorted signal after amplification modeling.
Return type:: np.ndarray

property amplitude_alpha: float¶

Amplitude model factor \(\alpha_\mathrm{a}\).

property amplitude_beta: float¶

Amplitude model factor \(\beta_\mathrm{a}\).