Hybrid I/Q and polar transmitter

摘要

A hybrid polar I-Q transmitter includes an I-Q derivation circuit configured to receive a first and second I-Q data components comprising a first I-Q data pair, and generate a first and second I-Q derived data components comprising a second I-Q data pair, respectively, based thereon, by utilizing a resolution information of a digital-to-analog converter (DAC) and a design criteria. The I-Q derivation circuit is further configured to determine a residual angle corresponding to a phase angle difference between the first I-Q data pair and the second I-Q data pair. The hybrid polar I-Q transmitter further comprises a modulation circuit configured to compensate the determined residual angle corresponding to the phase angle difference between the first I-Q data pair and the second I-Q data pair.

主权项

1. A hybrid polar in-phase quadrature (I-Q) transmitter, comprising:
an I-Q derivation circuit configured to: receive first and second I-Q data components comprising a first I-Q data pair, generate first and second I-Q derived data components comprising a second I-Q data pair, respectively, based on a resolution information of a digital-to-analog converter (DAC) in a signal path of the first and second I-Q derived data components and a design criteria, and wherein the I-Q derivation circuit is further configured to determine a residual angle corresponding to a phase angle difference between the first I-Q data pair and the second I-Q data pair, wherein each of the first and second I-Q data pairs corresponds to a point in an I-Q constellation diagram, and wherein the first I-Q data pair defines a first phasor having a first radius and a first phase angle associated therewith and the second I-Q data pair defines a second phasor having a second radius and a second phase angle associated therewith; and a modulation circuit configured to compensate the determined residual angle corresponding to the phase angle difference between the first I-Q data pair and the second I-Q data pair in the I-Q derivation circuit.