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Method for detecting uplink synchronizing signals

A technology of detection threshold and serial number, which is used in communication between multiple stations, radio transmission systems, electrical components, etc., to achieve the effect of good detection performance

Inactive Publication Date: 2009-10-21
MSTAR SEMICON INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Although the protocol has made the above-mentioned extensions, as the on-site communication environment becomes more and more complex, it is still unavoidable that the UpPCH is interfered. Therefore, a better uplink synchronization detection method is needed to resist the impact of interference on the detection accuracy.

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  • Method for detecting uplink synchronizing signals
  • Method for detecting uplink synchronizing signals
  • Method for detecting uplink synchronizing signals

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Embodiment Construction

[0036] combined with image 3 Shown method of the present invention comprises 3 big step implementation processes, and its concrete implementation process is as follows:

[0037] First, the normalized sliding correlation power value is obtained, and the specific process is as follows,

[0038] 1) Receive from GP start time + n UpPCHShift The first L chip data, wherein the length of L is related to the implementation and the coverage of the base station. In this embodiment, the most commonly used L=256 is used as an example, which is denoted as r' i , i=1~256, add 32 zeros before r', and then add 95 zeros to get 383 long data r i , i=1~383.

[0039] 2) Use 8 SYNC-UL codes to perform sliding correlation on r, and obtain 256 correlation values

[0040] c n , i = 1 128 Σ k = 1 ...

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Abstract

The invention provides a method for detecting uplink synchronizing signals sent by user equipment (UE) by a base station, which is applied to a TD-SCDMA. Under the environment of a plurality of cells, a time slot between GP and UpPTS at the end of a cell base station end have interference of an uplink time slot or a downlink time slot with an adjacent cell with the same frequency at a far end, under the condition of larger interference, the base station can not rightly detect the UpPCH sending information of the UE. Aiming at the problems, the invention discloses an improved method for detecting uplink pilot channels, which is characterized by comprising the following steps: firstly, calculating normalized relative power values of receiving signals by using SYNC-UL codes corresponding to the cell; secondly, determining the peak value and the corresponding time thereof by using the normalized relative power values; and thirdly, activating and judging the uplink pilot channels attributed to different SYNC-UL codes. The method can better solve the influence of the interference to the uplink synchronizing signals through emulation and test.

Description

technical field [0001] The present invention relates to a method applied to a wireless communication system, in particular to a method applied to a base station in a TD-SCDMA mobile communication system to detect an uplink synchronization signal sent by a user terminal (UE). Background technique [0002] TD-SCDMA system is a synchronous communication system, which has relatively strict requirements on the synchronization of uplink and downlink. In idle mode, the user terminal (UE) has established downlink synchronization with the base station (Node B), and constantly monitors the downlink paging information. When the user terminal (UE) receives its own paging or needs to initiate a call , the user terminal (UE) needs to establish a reliable uplink communication link on the basis of uplink synchronization. However, at this time, the user terminal (UE) does not know the propagation delay with the base station (Node B), that is, it cannot accurately know the transmission power...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04B7/216
Inventor 戎波孙飞雪
Owner MSTAR SEMICON INC