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Apparatus for duplexing signals, wireless communication device and method of duplexing signals

A signal and wireless technology, applied in the field of multiplexing signals, to reduce memory requirements, increase calibration speed, and improve isolation

Active Publication Date: 2019-08-06
U-BLOX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0020] However, the above equilibrium equation relies on knowledge of the equilibrium reflection coefficient value

Method used

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  • Apparatus for duplexing signals, wireless communication device and method of duplexing signals
  • Apparatus for duplexing signals, wireless communication device and method of duplexing signals
  • Apparatus for duplexing signals, wireless communication device and method of duplexing signals

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Embodiment Construction

[0057] Throughout the following description, the same reference numerals will be used to identify the same parts. References herein to "ports" should also be understood to refer to "nodes" and vice versa.

[0058] refer to figure 1 A wireless communication device 100 employing a duplex arrangement includes a transmission path 102 including a baseband processor 104 coupled to a digital-to-analog converter (DAC) 106 via a first data bus 105 . The DAC 106 has an in-phase (I) component output and a quadrature (Q) component output, both of which are coupled to corresponding inputs of the first mixer 108 . The output terminal of the first mixer 108 is coupled to the input terminal of the power amplifier 110 , and the output terminal of the power amplifier 110 is coupled to the transmission port 112 of the mixing circuit 114 or the mixing joint. The receiving port 116 of the mixing circuit 114 is coupled to the input terminal of the low noise amplifier 118 . The output of the low no...

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PUM

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Abstract

The invention disclseos an apparatus for a duplexing signals, a wireless communication device and a method of duplexing signals. The duplexing apparatus comprises a reference of impedance settings andcorresponding calibration measurements. A controller (128) is arranged to set a variable impedance (130) to a first impedance setting and transmit a first transmit signal at a first transmit frequency and measure a resulting first signal at an output node (116) of a hybrid circuit (114). The controller (128) then selects a second impedance setting, transmits a second transmit signal at a second transmit frequency and measures a resulting second signal at the output node (116). The controller (128) then determines a balancing result using a system of equations associating the first and secondmeasured signals, and first and second calibration measurements from the reference in respect of the first and second impedance settings, respectively. A third impedance setting is retrieved from thereference by reference to the balancing result to provide isolation of an input node (112) from the output node (116) of the hybrid circuit (114).

Description

technical field [0001] The present invention relates to a type of apparatus for duplexing signals that uses, for example, a system of equations to determine a balanced impedance setting for a hybrid junction. The invention also relates to a type of wireless device that uses, for example, a system of equations to determine a balanced impedance setpoint for a hybrid joint. The invention further relates to a method of multiplexing signals, which method is of the type, for example using a system of equations to determine a balanced impedance setting for a hybrid joint. Background technique [0002] In some wireless communication systems, such a system includes a network infrastructure and user equipment, which may be, for example, a portable communication device. Such communications equipment typically receives and transmits signals through the same antenna or group of antennas. This means that some form of duplexing scheme is required to allow the device to separate incoming ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/525H04L5/14
CPCH04B1/525H04L5/14H03H7/463H04B1/582H04B17/11H04B17/101H04B17/29H04B17/21H04B17/24H04L5/1461H04B17/15H04W24/02
Inventor L·劳克林
Owner U-BLOX