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A Timing Estimation Method

A technology of timing estimation and timing deviation, applied in the direction of baseband system components, etc., can solve the problems of slow timing tracking and affecting the accuracy of timing estimation, and achieve the effects of shortening the cycle, improving accuracy, and increasing resources

Inactive Publication Date: 2018-02-27
POTEVIO INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The position of the receiving window is adjusted every 40 wireless frames. The process of adjusting the position of the receiving window is: when the instantaneous timing estimate TA is between [-3Ts, 2Ts], timing adjustment according to 5 / 8 TA can ensure the accuracy of timing adjustment while the timing tracking is slow when the instantaneous burst timing is large, thus affecting the accuracy of the timing estimation

Method used

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Embodiment Construction

[0016] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] The core idea of ​​the present invention is: use pilot frequency resource to carry out channel estimation in each asynchronous wireless frame, can increase the resources for timing estimation like this, thereby shorten the period of timing deviation estimation, make the speed of timing tracking quicker, like this, When the instantaneous burst timing is large, the timing tracking is faster, thereby effectively improving the accuracy of timing estimation.

[0018] figure 2 It is a schematic flow chart of Embodiment 1 of the present invention, such as figure 2 As shown, this embodiment mainly includes:

[0019] Step 201. In each radio frame, if the preset windowing adjustment period is currently reached, the user equipment uses th...

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Abstract

The present application discloses a timing estimation method, including: in each radio frame, if the preset windowing adjustment period is currently reached, the user equipment uses the timing deviation TA_Temp of the previous radio frame to calculate the start time of data reception Adjustment; after the adjustment is completed, the timing deviation TA_Temp of the previous wireless frame is set to 0; the user equipment judges whether the current wireless frame is a synchronous frame; when it is judged as an asynchronous frame, the pilot frequency of the current radio frame is used Channel estimation performs timing estimation, and uses the result TA_pilot of the timing estimation, the preset first phase-locked loop factor alpha1 and the timing deviation TA_Temp of the previous wireless frame to calculate the timing deviation TA_Temp' of the current wireless frame; when it is judged to be synchronous At frame time, use the synchronization signal on the synchronization frame to perform timing estimation, and calculate the timing of the current wireless frame according to the timing estimation result TA_sync, the preset second phase-locked loop factor alpha2 and the timing deviation TA_Temp of the previous wireless frame Deviation TA_Temp'. The invention can effectively improve the accuracy of timing estimation.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a timing estimation method. Background technique [0002] A wireless communication system occupies a discontinuous spectrum bandwidth, such as figure 1 shown. Each physical channel with a frequency domain of 25kHz bandwidth is defined as a frequency point, up to frequency points. [0003] The discontinuous frequency points of the wireless communication system are divided into common frequency points and synchronous frequency points. In the common frequency points, a synchronization signal is sent every 40 wireless frames to ensure that the user equipment (UE) performs normally on the common frequency points. Carrier synchronization and time synchronization, this kind of wireless frame that sends a synchronization signal is called a synchronization frame. The period of the synchronous frame is 1s, that is, it is sent every 40 wireless frames, and placed in the place ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02
Inventor 王丽
Owner POTEVIO INFORMATION TECH CO LTD