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US 12,633,936 B2Granted
Method for determining an IQ offset
AssigneeLambda:4 Entwicklungen GmbH
InventorRönne Reimann
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AssigneeLambda:4 Entwicklungen GmbH
InventorRönne Reimann
Estimating the term…
The invention relates to the process of determining an IQ offset, in particular at low intermediate frequencies, in a receiver for electromagnetic radiation, in particular for digital data transmission. The aim of the invention is to provide a simple manner for determining the IQ offset, in particular quickly, reliably, and/or at low intermediate frequencies. According to the invention, this is achieved in particular in that the analog-digital converter is separated from the receiving devices and is electrically connected to at least one resistor by means of a switch in order to determine the IQ offset. While the analog-digital converter is connected to the resistor and not to the receiving devices, digital IQ values are obtained by means of the analog-digital converter. The digital IQ values obtained while the converter is connected to the resistor are used to determine the IQ offset.
A method for determining an IQ offset of an analogue-digital converter arrangement coupled with at least one receiving device of a receiver for receiving and decoding electromagnetically transmitted information, wherein the analogue-digital converter arrangement comprises a switch, an analogue-digital converter and a resistor, wherein at least one amplifier is arranged between the switch and the analogue-digital converter or no amplifier is arranged between the switch and the at least one receiving device;
A receiver for receiving and decoding electromagnetically transmitted information comprising an analogue-digital converter arrangement and at least one receiving device, wherein the analogue-digital converter arrangement comprises at least one switch, at least one analogue-digital converter and at least one resistor, wherein the receiver is configured to obtain digital IQ values from at least one electrical signal via the analogue-digital converter and for the at least one electrical signal to be fed to the analogue-digital converter from the at least one receiving device, via the at least one switch, wherein the receiver is configured, via the at least one switch, to disconnect the analogue-digital converter from the at least one receiving device and to connect the analogue-digital converter electrically to the at least one resistor and to obtain IQ digital data via the analogue-digital converter while the analogue-digital converter is connected to the at least one resistor, wherein the receiver is configured to use the digital IQ data obtained during the analogue-digital converter being connected to the at least one resistor to determine an IQ offset, wherein no amplifier is arranged between the at least one switch and an antenna or no amplifier is arranged between the at least one switch and the at least one receiving device, or wherein at least one amplifier is arranged between the at least one switch and the analogue-digital converter.
Dependencies are inferred from the claim text.