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Frequency offset compensation method and system

A technology of frequency offset compensation and signal compensation, which is applied in the field of communication, can solve the problems of inconsistency in the frequency offset of multi-channel signals, and achieve the effects of reducing the difficulty of implementation, reducing the relative frequency offset, and reducing the power consumption of transmission

Inactive Publication Date: 2019-08-09
CHONGQING UNIV +1
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Problems solved by technology

[0007] The purpose of this disclosure is to provide a frequency offset compensation method and system to solve the problem of inconsistency in the frequency offset of multiple signals in the TDRSS system

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  • Frequency offset compensation method and system

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Embodiment Construction

[0066] Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0067] In view of the non-uniform frequency offset problem of multi-channel array element signals passing through the channel in the TDRSS reverse link, the present disclosure provides a frequency offset compensation system and method, based on adaptive linkage of multi-channel array element signal non-uniform frequency offset compensation , in order to improve the impact of the non-uniform frequency offset of multi-channel array element signals on the sub-satellite DBF pointing accuracy.

[0068] see figure 1 , is a schematic structural diagram of a TDRSS system according to an embodiment of the present disclosure. A tracking and data relay satellite syste...

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Abstract

The invention discloses a frequency offset compensation method and system. The method comprises the steps of: carrying out preprocessing on N paths of received array element signals; respectively carrying out digital down-conversion processing on the N paths of preprocessed array element signals so as to obtain N paths of target signals; aiming at each path of signal to be compensated, acquiring a relative frequency difference between the signal to be compensated and a reference signal, wherein the reference signal is a random path of signal in the N paths of target signal, and the signals to be compensated are signals in the N paths of target signals except for the reference signal; and aiming at each path of signal to be compensated, according to the relative frequency difference between the signal to be compensated and the reference signal, carrying out frequency offset compensation on the signal to be compensated. Implementation of the frequency offset compensation method and system disclosed by the invention has the beneficial effects that by a frequency offset compensator and a phase retrieval module, one random path of signal is used as the reference signal and the rest of channels are subjected to frequency offset compensation, so that frequency offset nonuniformity of the N paths of signals, which is generated by relative motion and a local oscillation error, can be improved.

Description

technical field [0001] The present disclosure relates to the technical field of communications, and in particular, to a frequency offset compensation method and system. Background technique [0002] Tracking and data relay satellite system (TDRSS) has played an extremely important role in the development of space technology because of its high coverage, high data rate and multi-target measurement and control capabilities. [0003] TDRSS consists of two in-orbit synchronous relay satellites and a ground station. The reverse link of TDRSS is an information transmission channel that transmits telemetry data from target aerospace devices (such as aircraft, user satellites, etc.) to ground stations, and it can simultaneously transmit the measurement and control information of multiple target aerospace devices. In order to track and forward multiple targets at the same time, phased array antennas based on beamforming are usually used on TDRSS relay satellites. In order to reduce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L7/033H04L27/00
CPCH04L7/033H04L27/0014H04L2027/0026
Inventor 谭晓衡严强杨卓江东张雪静
Owner CHONGQING UNIV
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