US 2016/0105301 A1Published application

Detector and method for detecting iq swap

AssigneeNovatek Microelectronics Corp.

InventorChung-Hsien Hsieh

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Abstract

A detector and a method for detecting IQ swap are provided. The detector includes a first correlator, a second correlator and a comparator. The first correlator calculates a first correlation value between a received symbol stream and a first conjugated symbol stream. The received symbol stream is generated by a transmission of a known symbol stream through a transmission channel. The first conjugated symbol stream is conjugate complex of the known symbol stream. The second correlator calculates a second correlation value between the first conjugated symbol stream and a second conjugated symbol stream. The second conjugated symbol stream is conjugate complex of the received symbol stream. In accordance with a relationship between the first and second correlation values, the comparator determines whether an in-phase component and a quadrature component in the received symbol stream have been swapped.

Claims16

Dependent claims

An IQ swap detector, comprising:

a first correlator circuit, receiving a first conjugated symbol stream and a received symbol stream, and calculating a first correlation value between the received symbol stream and the first conjugated symbol stream, wherein the received symbol stream is generated by a transmission of a known symbol stream through a transmission channel, and the first conjugated symbol stream is conjugate complex of the known symbol stream;
a second correlator circuit, receiving the first conjugated symbol stream and a second conjugated symbol stream, and calculating a second correlation value between the first conjugated symbol stream and the second conjugated symbol stream, wherein the second conjugated symbol stream is conjugate complex of the received symbol stream;
and
a comparator circuit, coupled to the first correlator circuit to receive the first correlation value, coupled to the second correlator circuit to receive the second correlation value, and determining whether an in-phase component and a quadrature component in the received symbol stream are swapped according to a relationship between the first correlation value and the second correlation value,
wherein the first conjugated symbol stream and the received symbol stream are in time-domain.

2 more elements

A method for detecting IQ swap, comprising:

calculating a first correlation value between a received symbol stream and a first conjugated symbol stream by a first correlator circuit, wherein the received symbol stream is generated by a transmission of a known symbol stream through a transmission channel, and the first conjugated symbol stream is conjugate complex of the known symbol stream;
calculating a second correlation value between the first conjugated symbol stream and a second conjugated symbol stream by a second correlator circuit, wherein the second conjugated symbol stream is conjugate complex of the received symbol stream;
and
determining whether an in-phase component and a quadrature component in the received symbol stream are swapped according to a relationship between the first correlation value and the second correlation value by a comparator circuit,
wherein the first conjugated symbol stream and the received symbol stream are in time-domain.

2 more elements

Dependencies are inferred from the claim text.