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Carrier synchronization method and device

A carrier synchronization and carrier technology, applied in the modulation carrier system, digital transmission system, electrical components, etc., can solve the problems of poor autocorrelation and cross-correlation characteristics, large carrier frequency offset deviation, inaccurate synchronization results, etc., to reduce error Bit rate, the effect of improving frequency offset accuracy

Active Publication Date: 2021-10-08
国网思极位置服务有限公司 +1
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AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a carrier synchronization method for the defects that the carrier frequency deviation is large and the synchronization result is inaccurate due to its poor autocorrelation and cross-correlation characteristics when the existing communication system uses m-sequence for carrier synchronization. Method and apparatus to solve the above problems

Method used

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  • Carrier synchronization method and device

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Embodiment Construction

[0061] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the drawings and specific embodiments are only exemplary, and should not be construed as limiting the protection scope of the present invention.

[0062] In addition to being used in OvTDM and OvFDM systems, the technologies described in this paper can also be widely used in practical mobile communication systems, such as TD-LTE, TD-SCDMA and other systems, and can also be widely used in satellite communication, microwave line-of-sight communication In any wireless communication system such as , scattering communication, atmospheric optical communication, infrared communication and aquatic communication. The terms "network" and "system" are often used interchangeably.

[0063] The continuous development of mobile communications and the emergence of new services have put forward higher a...

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Abstract

The present invention provides a carrier synchronization method, comprising: performing a cross-correlation operation on two training codes extracted from a received signal, wherein the received signal is obtained from an initial frequency domain The time-domain data signal generated by the inverse Fourier transform of the data signal is composed of the time-domain training sequence signal and the time-domain training sequence signal includes the training sequence and data based on the training code, wherein the training sequence bandwidth is greater than the data bandwidth and training The power spectral density of the sequence is lower than the power spectral density of the data; and frequency offset correction is performed on the received signal based on the frequency offset. The invention improves the frequency offset precision of the system and reduces the bit error rate of the whole system.

Description

technical field [0001] The present invention generally relates to a wireless communication system, and in particular to a carrier synchronization method and device. Background technique [0002] Wireless communication networks are widely deployed to provide various communication services such as voice, video, packet data, messaging, broadcast, and so on. These wireless networks may be multiple-access networks capable of supporting multiple users by sharing available network resources. Examples of such multiple-access networks include Code Division Multiple Access (CDMA) networks, Time Division Multiple Access (TDMA) networks, Frequency Division Multiple Access (FDMA) networks, Orthogonal FDMA (OFDMA) networks, and Single-Carrier FDMA (SC-FDMA) networks. )The internet. [0003] With the ever-increasing demand for global mobile communications, the frequency resources of wireless communications are becoming increasingly tight. Therefore, in addition to the above-mentioned tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L27/2659
Inventor 不公告发明人
Owner 国网思极位置服务有限公司
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