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Timing synchronization method and apparatus

A timing synchronization and location synchronization technology, applied in the field of communication, can solve the problems of poor configurability and versatility

Active Publication Date: 2018-12-04
CHINA ACAD OF TELECOMM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The embodiment of the present application provides a timing synchronization method and device, which are used to realize timing synchronization based on software radio technology, and solve the problem of poor configurability and versatility of the timing synchronization scheme implemented by hardware

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Embodiment Construction

[0047] In the prior art, taking the cellular network—Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) system as an example, the system transmits downlink in the downlink pilot time slot (DwPTS) section of its frame structure The synchronization code SYNC_DL is sent with a fixed power and a fixed period of 5ms. In order to support multi-cell networking, the system configures a total of 32 SYNC_DLs. After the terminal (User Equipment, referred to as UE, also called user equipment) is turned on, it needs to perform correlation calculations with 32 possible SYNC_DLs one by one, and then compare the correlation peaks of each correlation calculation result, and select the SYNC_DL corresponding to the largest correlation peak as the current SYNC_DL for cell access. At the same time, the terminal can also establish downlink synchronization by detecting the occurrence position of the maximum correlation peak. After the downlink synchronization is established, it is ...

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Abstract

The application discloses a timing synchronization method and apparatus that are realized based on software radio technologies. In the timing synchronization method and apparatus disclosed in the application, a data block is intercepted in received time domain data according to a maximum transmission time delay, the intercepted data block is divided into N sub-blocks, and synchronization positionsearching operation is performed orderly in the N sub-blocks; when a synchronization position is searched in one of the N sub-blocks, timing synchronization is performed according to the searched synchronization position; when the synchronization position is searched in a Kth sub-block in the N sub-blocks, the Kth sub-block can be divided into Q data segments, and searching operation can be performed in the Q data segments. Via the timing synchronization method and apparatus disclosed in the application, timing synchronization can be realized based on software radio technologies, and problemsof poor configurability and universality of a timing synchronization solution which is realized via hardware can be solved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a timing synchronization method and device based on software radio technology. Background technique [0002] Affected by the propagation delay, the frame timing positions of the receiving end and the transmitting end of the wireless communication system are different. Therefore, wireless communication systems, especially time-division communication systems, have high requirements for time synchronization. Only after the receiver completes the time synchronization, can it find the starting position of the received frame, further extract the reference signal and data symbols and further complete the receiving demodulation work. [0003] At present, various wireless communication systems use the method of sending a synchronization sequence with good correlation performance to help the receiving terminal achieve synchronization. The entire synchronization process can be divid...

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Application Information

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IPC IPC(8): H04W56/00H04J3/06H04B1/00
CPCH04B1/0003H04J3/0638H04J3/0652H04J3/0682H04W56/001H04W56/0035
Inventor 丁阳金晓成宋文宁乔逢浩吴建峰
Owner CHINA ACAD OF TELECOMM TECH