US 12,750,104 B2 · Beamforming phase correction in a wireless communication circuit

Abstract

Beamforming phase correction in a wireless communication circuit is provided. The wireless communication circuit is configured to emit multiple processed signals, which are generated by applying a codeword to a radio frequency (RF) signal. The codeword defines a set of complex-valued coefficients that will cause each of the processed signals to be associated with a respective one of multiple defined phases such that the processed signals can form an RF beam when emitted simultaneously from multiple antenna elements. However, some or all of the defined phases can be changed, for example, when the processed signals are amplified. In this regard, in embodiments disclosed herein, a phase correction circuit is configured to determine one or more phase correction terms and apply the determined phase correction terms to one or more of the processed signals to thereby correct undesired phase changes and restore coherency among the processed signals.

Claims12

Dependent claims

A phase correction circuit comprising:

a plurality of phase correction lookup tables (LUTs) each pre-calibrated to store one or more phase correction terms;
a control circuit configured to determine a respective one of a plurality of phase correction terms for a respective one of a plurality of processed signals based on the one or more phase correction terms stored in a respective one of the plurality of phase correction LUTs;
and
a plurality of phase shifters each configured to:
receive a respective one of the plurality of processed signals associated with a respective one of a plurality of predefined phases;
receive a respective one of the plurality of phase correction terms from the control circuit;
and
phase shift the respective one of the plurality of processed signals by a combination of the respective one of the plurality of predefined phases and the respective one of the plurality of phase correction terms.

5 more elements

A transceiver circuit comprising:

a signal processing circuit configured to generate a radio frequency (RF) signal;
a beamformer circuit configured to process the RF signal to generate a plurality of processed signals each associated with a respective one of a plurality of predefined phases;
a phase correction circuit comprising:
a plurality of phase correction lookup tables (LUTs) each pre-calibrated to store one or more phase correction terms;
a control circuit configured to determine a respective one of a plurality of phase correction terms for a respective one of a plurality of processed signals based on the one or more phase correction terms stored in a respective one of the plurality of phase correction LUTs;
and
a plurality of phase shifters each configured to:
receive a respective one of the plurality of processed signals associated with a respective one of a plurality of predefined phases;
receive a respective one of the plurality of phase correction terms from the control circuit;
and
phase shift the respective one of the plurality of processed signals by a combination of the respective one of the plurality of predefined phases and the respective one of the plurality of phase correction terms.

8 more elements

A wireless communication circuit comprising:

a transceiver circuit comprising:
a signal processing circuit configured to generate a radio frequency, RF, signal;
a beamformer circuit configured to process the RF signal to generate a plurality of processed signals each associated with a respective one of a plurality of predefined phases;
and
a phase correction circuit comprising:
a plurality of phase correction lookup tables (LUTs) each pre-calibrated to store one or more phase correction terms;
a control circuit configured to determine a respective one of a plurality of phase correction terms for a respective one of a plurality of processed signals based on the one or more phase correction terms stored in a respective one of the plurality of phase correction LUTs;
and
a plurality of phase shifters each configured to:
receive a respective one of the plurality of processed signals associated with a respective one of a plurality of predefined phases;
receive a respective one of the plurality of phase correction terms from the control circuit;
and
phase shift the respective one of the plurality of processed signals by a combination of the respective one of the plurality of predefined phases and the respective one of the plurality of phase correction terms.

10 more elements

Dependencies are inferred from the claim text.

Beamforming phase correction in a wireless communication circuit

Life of this patent

Beamforming phase correction in a wireless communication circuit

Life of this patent

Abstract

Claims12