St-ericsson Sa

Robin Gerzaguet

Fabrice Belveze

A receiver () has an ln-phase path (l-path) () that delivers a digital l-path signal x(t) and a Quadrature path (Q-path) () that delivers a digital Q-path signal x(t). The receiver () includes a compensation stage () arranged to compensate for gain error g and phase error &#x3c6; between the digital l-path signal x(t) and the digital Q-path signal x(t). The compensation stage () has a compensation coefficient generation stage (), a compensation coefficient application stage (), a gain control stage (), a relative gradient generation stage () and a step parameter generation stage (). Compensation coefficients W, W, W, Wapplied to the digital l-path signal x(t) and the digital Q-path signal x(t) are generated by iteratively updating them using a relative gradient of the compensated digital in-phase signal y(t) and a compensated digital quadrature signal y(t), and a step parameter &#x3bc;, the magnitude of which is adjusted based on a rate of change of the compensation coefficients W, W, W, W.

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Gieres, France

Robin Gerzaguet