Technique for calibrating a receiver apparatus
Номер патента: EP2839620A1
Опубликовано: 25-02-2015
Автор(ы): Jim Svensson, Leif Wilhelmsson, Roland Strandberg
Принадлежит: Telefonaktiebolaget LM Ericsson AB
Опубликовано: 25-02-2015
Автор(ы): Jim Svensson, Leif Wilhelmsson, Roland Strandberg
Принадлежит: Telefonaktiebolaget LM Ericsson AB
Реферат: A technique for calibrating a receiver apparatus comprising at least one analog signal processing component and an intermediate frequency, or IF, mixer for converting IF signals comprising an in-phase, or I, signal and a quadrature-phase, or Q, signal to baseband frequency signals is provided. The IF mixer is arranged downstream of the at least one analog signal processing component. A method implementation of the technique comprises the steps of determining, in a digital processing domain downstream of the IF mixer, a metric which is affected by a frequency dependency of an imbalance between I and the Q signal, or IQ-imbalance, over a signal bandwidth, generating, based on the metric thus determined, a calibration signal configured to at least partially compensate a frequency-dependency of the IQ imbalance, and feeding the calibration signal to the at least one analog signal processing component so as to calibrate the at least one analog signal processing component.
Technique for Calibrating a Receiver Apparatus
Номер патента: US20150071391A1. Автор: Leif Wilhelmsson,Jim Svensson,Roland Strandberg. Владелец: Telefonaktiebolaget LM Ericsson AB. Дата публикации: 2015-03-12.