Wideband quadrature error detection and correction

A quadrature phase and parameter correction technology, applied in the field of electronic equipment, can solve problems such as dropped calls

Active Publication Date: 2015-02-11
ANALOG DEVICES INC
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  • Abstract
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Problems solved by technology

Also, taking the transmitter offline to complete the calibration process is undesirable as it can lead to dropped calls and other undesirable side effects

Method used

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  • Wideband quadrature error detection and correction
  • Wideband quadrature error detection and correction
  • Wideband quadrature error detection and correction

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Embodiment Construction

[0033] The following detailed description of certain embodiments presents various descriptions of specific embodiments of the invention. However, other embodiments of the invention can be implemented in many different ways, as defined and covered by the claims. In this specification, reference is made to the drawings, wherein like reference numerals indicate like elements.

[0034]As described herein, a transmission module is provided that includes a transmitter, a loopback receiver, a calibration module, a switch module, and a QEC controller. A switch module may be located between the output of the transmitter, the output of the calibration module, and the input of the loopback receiver. In calibration mode, the switch module provides a communication path between the calibration module and the loopback receiver. The loopback receiver processes the data signal received from the self-calibration module and outputs the processed data signal to the QEC controller. Using the pr...

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Abstract

A transmission module is provided that includes a transmitter, a loopback receiver, and a QEC controller. The QEC controller identifies quadrature imbalance in the transmitter based at least one a comparison of the data signals at the output of the loopback receiver with data signals at the input of the transmitter. Based on the comparison, the QEC controller can adjust one or more characteristics of the transmitter to correct quadrature errors in the transmitter.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Application No. 61 / 858534, filed July 25, 2013, and is related to U.S. Application No. 13 / 951341, filed July 25, 2013; filed March 15, 2013 U.S. Provisional Application No. 61 / 786,393, filed March 15, 2013; U.S. Provisional Application No. 61 / 786,469, filed March 15, 2013; and U.S. Application No. 13 / 897,719, filed May 20, 2013, each of which passed Incorporated herein by reference. technical field [0003] Embodiments of the present disclosure relate to electronic devices, and more particularly, in one or more embodiments, to wireless transmitters. Background technique [0004] Transmitters for wireless infrastructure such as cellular base stations have traditionally been implemented using superheterodyne or complex intermediate frequency (IF) architectures. Using a direct-conversion architecture instead of a superheterodyne architecture to implement a wireless tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/04
CPCH04B17/11H04B1/0475
Inventor R·霍尔米斯S·R·巴尔A·蒙塔尔沃D·J·迈克劳瑞恩M·迈考米克
Owner ANALOG DEVICES INC
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