Full duplex time delay estimation method and full duplex time delay estimation device
A technology of working hours and time, applied in the field of communication, can solve the problems of large error and the decline of self-interference offset ability of full-duplex system, and achieve the effect of fast speed
Active Publication Date: 2019-02-12
HUAWEI TECH CO LTD
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Problems solved by technology
In practice, as the error between the calculated result of the time delay and the actual result of the time delay increases, the self-interference cancellation capability of the full-duplex system will decrease
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Embodiment Construction
[0054] Embodiments of the present invention provide a full-duplex time delay estimation method and a full-duplex time delay estimation device, which can estimate the time delay between a useful signal and an interference signal with high accuracy.
[0055] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0056] The terms "comprising" and "having" and any variations thereof in the description an...
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The embodiment of the invention discloses a full-duplex time delay estimation method and device. The method comprises the steps: carrying out the interpolation filtering of a mixed signal, calculating a timing error of a usable signal, adjusting the coefficient of an interpolation filtering module through employing the timing error, and repeatedly carrying out the above steps; carrying out the frame synchronization of the mixed signal and an interference signal after interpolation filtering when the interpolation filtering module is converged, and obtaining frame header information of the mixed signal; generating an interference training sequence with the same frame header information according to the frame header information; reconstructing the interference signal according to an interference reference signal through employing a first interference reconstruction module; calculating a first judgment error according to the interference training sequence and the interference signal, driving a first interference reconstruction module through employing the first judgment error, and carrying out the above steps repeatedly; and estimating the time delay between the usable signal and the interference signal according to a filter coefficient of the first interference reconstruction module when the first interference reconstruction module is converged. The method can calculate the time delay between the usable signal and the interference signal more quickly and accurately.
Description
technical field [0001] The invention relates to the technical field of communication, in particular to a full-duplex time delay estimation method and a full-duplex time delay estimation device. Background technique [0002] A full-duplex system uses the same frequency to receive and transmit signals. Compared with the traditional frequency division duplex system, the spectral efficiency is doubled. The key technologies of the full-duplex system include antenna cancellation, radio frequency cancellation, baseband cancellation, etc., among which, the performance of the full-duplex system is closely related to the interference cancellation capability. [0003] When a full-duplex system performs radio frequency cancellation and baseband cancellation, it is necessary to align the delay between the reference branch and the interference branch, that is, to calculate the time delay between the received useful signal and the interference signal. In practical applications, as the er...
Claims
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IPC IPC(8): H04L5/14H04B17/309
Inventor 蔡梦
Owner HUAWEI TECH CO LTD