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A method and device for high-precision timing offset estimation in an orthogonal frequency division multiplexing system

A timing offset estimation and orthogonal frequency division technology, applied in multi-frequency code systems, transmission systems, digital transmission systems, etc., can solve the problems affecting the real-time and high complexity of OFDM systems, and shorten the timing offset calculation time. , reduce the impact of real-time performance, and improve the effect of high-spectrum communication functions

Active Publication Date: 2022-07-08
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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  • A method and device for high-precision timing offset estimation in an orthogonal frequency division multiplexing system
  • A method and device for high-precision timing offset estimation in an orthogonal frequency division multiplexing system
  • A method and device for high-precision timing offset estimation in an 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 in an OFDM system disclosed by an embodiment of the present invention. like figure 1 As shown, the method for high-precision timing offset estimation in an OFDM system may include the following operations:

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

[0083] In the embodiment of the present invention, the initial parameter includes at least the number of subcarriers of the target signal, the cyclic prefix length of the target signal, and the signal-to-noise ratio of the target signal. Further, the initial parameter of the target signal may further 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 contents included in the initial parameters, the more favorable it is to obtain...

Embodiment 2

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

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

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

[0153] The determining module 201...

Embodiment 4

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

[0196] a memory 401 storing executable program code;

[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 4

[0200] An 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 a computer to execute the high-precision timing offset of the orthogonal frequency division multiplexing system described in...

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Abstract

The invention discloses a method and a device for high-precision timing offset estimation in an orthogonal frequency division multiplexing system. The method includes determining initial parameters of a target signal of an OFDM system, and the initial parameters at least include the number of sub-carriers of the target signal, the number of cyclic Prefix length, signal-to-noise ratio; initial parameters are calculated based on the predetermined timing measure function, the calculation result output by the timing measure function is obtained, and the timing offset estimation of the OFDM system is determined based on the calculation result. It can be seen that by determining the initial parameters of the signal of the OFDM system, and calculating the initial parameters based on the timing measurement function, the present invention obtains the timing offset estimation of the OFDM system, which can simplify the estimation steps of the timing offset estimation of the OFDM system and reduce the cost of the OFDM system. Therefore, the timing offset calculation time of the OFDM system is shortened, thereby reducing the impact on the real-time performance of the OFDM system, and improving the positioning accuracy of the OFDM system, which is conducive to improving the high-spectrum communication function of the OFDM system. .

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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