Transmitter quadrature mismatch calibration method and device based on self-mixing
A technology of quadrature mismatch and transmitter, which is applied in the direction of transmitter monitoring, digital transmission system, multi-carrier system, etc., can solve the problems of increasing costs and achieve the effect of reducing calibration costs
Active Publication Date: 2022-06-07
华朴无限(成都)科技有限公司
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
These methods have a better calibration effect due to the use of a separate receiver, but on the other hand, they also increase the cost
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0030] The following describes in detail the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to be used to explain the present application, but should not be construed as a limitation to the present application.
[0031] Low-cost self-mixing devices, such as diodes for power detection, are typically installed in quadrature transmitters. The devices themselves have a frequency mixing effect. If the training signal is properly designed, the mismatch information of the in-phase and quadrature paths can be down-converted to baseband through the self-mixing of the mixer, and then derived. Based on this idea, the present application provides a low-cost orthogonal mismatch calib...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present application discloses a self-mixing-based transmitter quadrature mismatch calibration method and device. The method includes: designing two narrow-band training signals of low-frequency baseband frequency points, and transmitting them in the in-phase and quadrature signal paths of the transmitter respectively. Different narrow-band training signals are transmitted multiple times in the upper division, and the carrier frequency leakage information of the transmitter is estimated from the device with the mixing function that comes with the transmitter; single-tone and DC training signals are designed on different frequencies, respectively in the same phase and in the normal traffic. Transmit single-tone and DC training signals and zero signals on the road, and estimate the quadrature mismatch information of the transmitter from the transmitter's built-in device with frequency mixing function; convert the broadband mismatch information at different frequency points into baseband in the frequency domain The compensation coefficient calculates the corresponding time-domain impulse response, and compensates the baseband signal in the time domain for quadrature mismatch calibration. The method can realize the quadrature mismatch calibration in the wideband frequency range, and the calibration cost can be reduced by using the frequency mixing device included in the transmitter.
Description
technical field [0001] The present application relates to the technical field of electronic communication, and in particular, to a method and device for calibrating the quadrature mismatch of a transmitter based on self-mixing. Background technique [0002] Orthogonal system transmitters (also known as direct up-conversion transmitters) are widely used in various fields of electronic communication. The basic principle is: structurally, the transmitter is divided into two channels, in-phase and quadrature. The added RF signal is used as the final transmitted signal. In the work flow, the real part and the imaginary part of the baseband complex signal are up-converted and modulated through the in-phase and quadrature channels, respectively, and then transmitted. Due to the imperfection of the device itself, the signals on the in-phase and quadrature channels achieve perfect quadrature effect, causing quadrature mismatch. The main reasons for quadrature mismatch are: the qua...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/11H04L27/36
CPCH04B17/11H04L27/364
Inventor 王劲涛张跃
Owner 华朴无限(成都)科技有限公司