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Five-window joint timing advance estimation and calibration method and system

A technology of timing advance and calibration method, which is applied in the field of five-window joint timing advance estimation and calibration method and its system, and can solve the problems of large error and inaccurate estimation.

Active Publication Date: 2021-11-30
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] However, due to the delay in the 5G signal transmission process, when the delay exceeds the length of the cyclic prefix (CyclicPrefix, CP), TA estimation cannot meet the requirements of the 5G protocol. Therefore, the preamble format 2 signal will be estimated when it is estimated Inaccurate, big error problem

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  • Five-window joint timing advance estimation and calibration method and system
  • Five-window joint timing advance estimation and calibration method and system
  • Five-window joint timing advance estimation and calibration method and system

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Embodiment Construction

[0047] The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention. The described embodiments are merely a part of the embodiments of the invention.

[0048] The present invention is a five-window joint timing advance amount estimation calibration method, such as figure 1 As shown, the method steps include:

[0049] S1: Get the signal of the PRACH front guide 2 in 5G;

[0050] S2: Seize the signal of the front guide 2 to 5 windows, numbered these 5 windows, from right to left, respectively, window 1, window 2, window 3, window 4, window 5;

[0051] S3: The sequence length of the top 4 windows is 24576K, and the data in front of the data in the window 5 is completed, so that the sequence length of the window 5 is 24576K;

[0052] S4: Detects the front guide sequence of the window 1, and records the detected predetermid sequence number and timing advance TA;

[0053] ...

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Abstract

The invention belongs to the technical field of mobile communication, and specifically relates to a method for estimating and calibrating five-window joint timing advance. The method includes: obtaining a signal of PRACH preamble format 2 in 5G; dividing the signal into 5 windows and numbering the 5 windows; The front of the data of 5 is filled with zeros, so that the sequence length of the five windows is 24576K; the preamble sequence of window 1 is detected, and the detected preamble sequence and TA are recorded; the preamble sequence detected by window 1 and the preamble of window 2 are used Sequence correlation, recording the leading sequence number of window 2; the detection method of windows 3 to 5 is the same as that of window 2; the detection results of 5 windows are obtained, and the joint timing advance of five windows is estimated for the detection results; the present invention will The detection window is divided into 5, which solves the problem that the TA estimate cannot meet the requirements of the 5G protocol when the delay exceeds the CP length.

Description

Technical field [0001] The present invention belongs to the field of mobile communication, and specifically involves five-window joint timing advancement estimation calibration method and its system. Background technique [0002] In the mobile communication system, if the terminal moves in the communication time period, the electromagnetic wave transmission speed may calculate the change in transmission between the base station and the terminal. The main role of TA, TIMING ADVANCE is to synchronize to ensure that the arrival time of the packets transmitted by all UEs. In the 5G system, the terminal is in idle mode, such as initial opening, the terminal wants to know the distance between itself and the base station needs to perform a random access process. The base station receives the preamble sequence transmitted during the random access process. By obtaining the random access preamble with the baseband signal processing, it is based on the estimated time, and finally the MSG2 i...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00
CPCH04W56/0005
Inventor 王丹张怡凡李小文陈发堂王华华李阳阳雷秀
Owner CHONGQING UNIV OF POSTS & TELECOMM
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