Iq-modulator pre-distortion

Details Iq-modulator pre-distortion Iq-modulator pre-distortion

H - Electricity

04

L

H04L 27/36 (2006.01) H03F 1/32 (2006.01)

Patent

CA 2593829

An IQ-modulator pre-distorter includes an iteratively updated digital filter (gQ 0, gQ 1) for filtering one of the branches of an IQ-signal to compensate for IQ- modulator generated amplitude errors. An iteratively updated digital filter (cQI 0, cQI 1 ), cross-connected from one of the branches to the other branch, filters one of the components of an IQ-signal to compensate for IQ- modulator generated inter-modulation between the branches. Iteratively updated compensators (dcI, dcQ) counteract IQ-modulator generated offset errors.

L'invention un dispositif de pré-distorsion d'un modulateur deIQ qui comporte un filtre numérique actualisé de manière itérative (gQ0, gQ1) qui filtre une des branches d'un signal IQ pour compenser les erreurs d'amplitude générées par le modulateur de IQ. Un filtre numérique actualisé de manière itérative (cQ0, cQ1), interconnecté d'une des branches à l'autre, filtre un des composants d'un signal IQ pour compenser l'inter-modulation générée par le modulateur de IQ entre les branches. Les compensateurs actualisés de manière itérative (dcI, dcQ) contrebalancent les erreurs de décalage générées par le modulateur de IQ.

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