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Method and device for estimating high-precision timing offset of orthogonal frequency division multiplexing system

A technology of timing offset estimation and orthogonal frequency division, applied in multi-frequency code system, transmission system, digital transmission system, etc., can solve the problems of high complexity and affecting the real-time performance of OFDM system

Active Publication Date: 2020-05-08
GUANGDONG PLANNING & DESIGNING INST OF TELECOMM
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AI Technical Summary

Problems solved by technology

However, due to the large amount of data used for correlation calculation and energy calculation when calculating the timing measure, the calculation complexity of the timing offset is high, which affects the real-time performance of the OFDM system

Method used

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  • Method and device for estimating high-precision timing offset of orthogonal frequency division multiplexing system
  • Method and device for estimating high-precision timing offset of orthogonal frequency division multiplexing system
  • Method and device for estimating high-precision timing offset of orthogonal frequency division multiplexing system

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Embodiment 1

[0081] see figure 1 , figure 1 It is a schematic flowchart of a method for high-precision timing offset estimation of an OFDM system disclosed in an embodiment of the present invention. Such as figure 1 As shown, the method for high-precision timing offset estimation of the OFDM system may include the following operations:

[0082] 101. Determine initial parameters of a target signal of an OFDM system.

[0083] In the embodiment of the present invention, the initial parameters include at least the number of subcarriers of the target signal, the length of the cyclic prefix of the target signal, and the signal-to-noise ratio of the target signal. Further, the initial parameter of the target signal may also include at least one of the number of taps of the channel and the average attenuation coefficient of the taps, which is not limited in this embodiment of the present invention. In this way, the more content the initial parameters include, the more beneficial it is to obtai...

Embodiment 2

[0150] see figure 2 , figure 2 It is a structural schematic diagram of a device for high-precision timing offset estimation of an OFDM system disclosed in an embodiment of the present invention. Such as figure 2 As shown, the device for high-precision timing offset estimation of an OFDM system may include a determination module 201 and a calculation module 202, wherein:

[0151] The determination module 201 is configured to determine initial parameters of the target signal of the OFDM system, the initial parameters at least include the number of subcarriers of the target signal, the length of the cyclic prefix of the target signal, and the signal-to-noise ratio of the target signal.

[0152] The calculation module 202 is configured to calculate an initial parameter based on a predetermined timing metric function, and obtain a calculation result output by the timing metric function.

[0153] The determining module 201 is further configured to determine the timing offset e...

Embodiment 4

[0195] see Figure 4 , Figure 4 It is another high-precision timing offset estimation device for an OFDM system disclosed in the embodiment of the present invention. Such as Figure 4 As shown, the device for high-precision timing offset estimation of the OFDM system may include:

[0196] A memory 401 storing executable program codes;

[0197] a processor 402 coupled to the memory 401;

[0198] The processor 402 invokes the executable program code stored in the memory 401 to execute the steps in the method for high-precision timing offset estimation of an OFDM system described in the first embodiment.

[0199] Embodiment four

[0200] The embodiment of the present invention discloses a computer-readable storage medium, which stores a computer program for electronic data exchange, wherein the computer program enables the computer to execute the high-precision timing offset of the OFDM system described in Embodiment 1. steps in the method for shift estimation.

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Abstract

The invention discloses a method and device for high-precision timing offset estimation of an orthogonal frequency division multiplexing system, and the method comprises the steps: determining initialparameters of a target signal of the OFDM system, and the initial parameters at least comprising the number of subcarriers, the cyclic prefix length and the signal-to-noise ratio of the target signal; and calculating the initial parameter based on a predetermined timing measure function to obtain a calculation result output by the timing measure function, and determining the timing offset estimation of the OFDM system based on the calculation result. Thus, by implementing the method, the estimation steps of timing offset estimation of the OFDM system can be simplified; the timing offset calculation complexity of the OFDM system is reduced, so that the timing offset calculation time of the OFDM system is shortened, influence on the real-time performance of the OFDM system is reduced, the positioning accuracy of the OFDM system is improved, and the high spectral efficiency communication function of the OFDM system is improved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication networks, in particular to a method and device for estimating high-precision timing offset in an OFDM system. Background technique [0002] OFDM (Orthogonal frequency division multiplexing, Orthogonal Frequency Division Multiplexing) is a widely used high-speed wireless communication technology, which has been written into multiple wireless communication standards, such as WiFi, WiMax and LTE. OFDM divides the wideband system into multiple orthogonal narrowband sub-channels, and only needs to perform a simple single-tap equalization on each sub-channel to overcome the frequency selectivity problem of the channel and realize communication with high spectrum efficiency. Among them, OFDM The key point for the system to achieve high spectrum efficiency communication is to reduce the time synchronization error. [0003] At present, the method to reduce the time synchronization e...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L27/00
CPCH04L27/2655H04L27/2607H04L27/0014H04L2027/0026
Inventor 李家樑黄伟如李盟张皓月袁引
Owner GUANGDONG PLANNING & DESIGNING INST OF TELECOMM
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