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

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: 2020-03-13
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 calibration method and system thereof
  • Five-window joint timing advance estimation calibration method and system thereof
  • Five-window joint timing advance estimation calibration method and system thereof

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[0047] The technical solutions in the embodiments of the present invention will be described clearly and in detail below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only a part of the embodiments of the present invention.

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

[0049] S1: Obtain the signal of PRACH preamble format 2 in 5G;

[0050] S2: Divide the signal of the leading format 2 into 5 windows, and number the 5 windows, from right to left are window 1, window 2, window 3, window 4, and window 5;

[0051] S3: The sequence length of the first 4 windows is 24576K, zero-padded operation is performed on the front of the data in window 5, so that the sequence length of window 5 is 24576K;

[0052] S4: Detect the preamble sequence of window 1, and record the detected preamble sequence number and timing advance TA; ...

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Abstract

The invention belongs to the technical field of mobile communication, and particularly relates to a five-window joint timing advance estimation calibration method which comprises the following steps:acquiring a signal in a PRACH preamble format 2 in 5G; dividing the signal into five windows and numbering the five windows; caryring out zero filling on the front of the data of the window 5, so as to enable the sequence lengths of the five windows are 24576K; detecting the leader sequence of the window 1, and recording the detected leader sequence and TA; by utilizing the fact that the leader sequence detected by the window 1 is related to the leader sequence of the window 2, recording the leader sequence number of the window 2, wherein the detection methods of the windows 3-5 are the same as the detection method of the window 2; acquiring detection results of the five windows, and performing five-window joint timing advance estimation on the detection results. According to the method, the detection window is divided into five windows, so that the problem that the TA estimation cannot meet the 5G protocol requirement due to the fact that the time delay exceeds the CP length is solved.

Description

Technical field [0001] The invention belongs to the field of mobile communication technology, and specifically relates to a five-window joint timing advance estimation and calibration method and a system thereof. Background technique [0002] In a mobile communication system, if the terminal is moving at a medium-to-high speed during the communication time period, it can be calculated from the electromagnetic wave transmission speed that the transmission delay between the base station and the terminal will change accordingly. The main function of the timing advance (TA, Timing Advance) is to ensure that the arrival time of all data packets transmitted by the UE are synchronized. In the 5G system, when the terminal is in idle mode, such as the initial startup scenario, the terminal needs to perform a random access process if it wants to know the distance between itself and the base station. The base station receives the preamble sequence transmitted in the random access process, ...

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Application Information

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Patent Type & Authority Applications(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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