Uplink synchronization tracking method and device in TD-SCDMA system

A TD-SCDMA, synchronous tracking technology, applied in the field of uplink synchronous tracking methods and devices, can solve problems such as easy misjudgment and unsatisfactory receiver performance, and achieve the effects of large amount of information, guaranteed performance, and reliable uplink synchronous tracking

Inactive Publication Date: 2008-03-12
SANECHIPS TECH CO LTD
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Problems solved by technology

[0006] In order to solve the disadvantages in the prior art that only use the information of the strongest path to judge whether the "synchronous timing relationship" has changed, it is easy to misjudgment, thus making the performance of the receiver unsatisfactory, the present invention provides an uplink in the TD-SCDMA system Synchronous tracking m...

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  • Uplink synchronization tracking method and device in TD-SCDMA system
  • Uplink synchronization tracking method and device in TD-SCDMA system

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Embodiment Construction

[0025] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0026] Fig. 1 is an operation flowchart of the uplink synchronization tracking method according to the present invention. As shown in Figure 1, the method may include the following steps:

[0027]Step S102, calculating a threshold value for judging the effective path;

[0028] Step S104, selecting an effective path according to a threshold value;

[0029] Step S106, performing threshold interpolation processing on the peak phase of the selected effective path to improve the accuracy of the peak phase;

[0030] Step S108, calculating the center of gravity of the energy moment for the effective diameter after the interpolation process; and

[0031] Step S110, using...

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Abstract

The present invention provides an uplink synchronous tracking method and a device in TD-SCDMA systems. The method can include steps below: I. Computing threshold values for effective diameter confirmation; II. Selecting effective diameters according to the threshold value; III. Interpolating threshold value to peak value phase position of the selected effective diameter to improve precision of the peak value phase position; IV. Computing energy matrix center of gravity for the effective diameter after being interpolated with the threshold value; V. Judging variation of synchronous sequence relation according to a relation between a position of the calculated energy matrix center of matrix and a target position arranged in outer synchronous control parameters and creating synchronous deviation commands. Therefore, the method and the device make uplink synchronous tracking more reliable, thus ensuring performance of receiving sets.

Description

technical field [0001] The present invention relates to the field of mobile communication, more specifically, to an uplink synchronization tracking method and device in a TD-SCDMA system. Background technique [0002] TD-SCDMA is a synchronous CDMA system, and the uplink signals sent by each user in the same time slot in the cell arrive at the base station at the same time. In this way, each code channel using the orthogonal spreading code can be completely orthogonal during despreading, without causing multiple access interference with each other, significantly reducing the interference between users in the cell, increasing the coverage of the cell, and improving the system capacity , which optimizes the link budget. At the initial stage of establishing a formal wireless link between the user terminal and the base station, uplink synchronization is established through a random access process. [0003] After the synchronization is established, since the position of each us...

Claims

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Application Information

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IPC IPC(8): H04B7/26H04B1/707H04J13/02H04B1/7073
CPCY02D30/70
Inventor 赵善红
Owner SANECHIPS TECH CO LTD
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