Quadrature error correction using polynominal models in tone calibration

Abstract

One example embodiment provides a system, apparatus, and method for using polynomial models in tone calibration for quadrature error correction in I / Q receivers. In one example embodiment, method for calibrating an I / Q receiver is provided and includes receiving a first mismatch parameter indicating a mismatch between I and Q channels of the I / Q receiver; and estimating a second mismatch parameter from the first mismatch parameter using a polynomial model.

Description

[0001] priority information [0002] This application claims priority to Provisional Patent Application Serial No. 61 / 798,197, filed March 15, 2013, which is hereby incorporated by reference in its entirety. technical field [0003] The present disclosure relates generally to in-phase and quadrature (I / Q) receiver signal processing, and more particularly to an apparatus, method and system for calibrating gain and phase imbalance in an I / Q receiver. Background technique [0004] Quadrature modulation is a technique used to transmit communication signals. In quadrature modulation, the transmitter transmits data on both the in-phase (I) and quadrature-phase (Q) channels simultaneously. Each of the I and Q channels carries a separate data stream and is phase shifted 90 degrees relative to each other on the carrier frequency. In an I / Q receiver, the I and Q channel signals are received at the carrier frequency, down converted and demodulated to recover the data from the individ...

AI Technical Summary

Problems solved by technology

These known techniques are less effective in environments with high noise levels or when the test tone signal jitter rises above a certain level

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