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A synchronization apparatus and method for CDMA mobile communication system

A mobile communication system, code division multiple access technology, applied in the field of synchronization method and device of time division synchronous code division multiple access mobile communication system, capable of solving problems not related to TD-SCDMA mobile communication system synchronization method and device

Inactive Publication Date: 2005-03-16
KAIMING INFORMATION SCIENCE & TECHNOLOGY CO LTD
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Problems solved by technology

The article does not involve the synchronization method and device for the TD-SCDMA mobile communication system

Method used

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  • A synchronization apparatus and method for CDMA mobile communication system
  • A synchronization apparatus and method for CDMA mobile communication system
  • A synchronization apparatus and method for CDMA mobile communication system

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Embodiment Construction

[0047] based on the following Figure 4 ~ Figure 7 , to illustrate the preferred embodiment of the present invention.

[0048] Such as Figure 4 Shown is a circuit block diagram of the cell search synchronization device in the code division multiple access mobile communication system provided by the present invention. The device includes a SYNC-DL code generator 41, a differential correlator 40 1 -40 L , multi-frame merging circuit 44 1 -44 L , peak detector 45 1 -45 L , comparator 46, etc. where the differential correlator consists of a sub-correlator 42 1 -42 L and differential combining circuit 43 1 -43 L composition. The data received by the UE enters the sub-correlator 42 in units of frames 1 -42 L , are correlated with the L SYNC-DL codes generated by the local SYNC-DL code generator 41 respectively.

[0049] The correlation method proposed by the present invention is divided into two steps of subsequence correlation and difference merging. First, each SY...

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Abstract

The invention relates to a synchronizing method and device for CDMA communication system, and the method contains a difference correlation step, containing: subsequence correlation step that relates the data sequence received by UE with P subsequences of synchronous sequence generated by a descending synchronous code generator of the US; a difference combination step: multiplying the previous correlated subsequence by the next correlated subsequence and accumulating P-1 output sequences. The device contains; a descending synchronous code generator, a correlator unit, a multiframe combining circuit unit, and a peak value detector unit, where L output ends of the peak value detector connected with a comparer, the correlator unit is a difference correlator containing L difference correlator, each of which contains a sub-correlator and a difference combining circuit; and the input end of the sub-correlator is connected with the descending synchronous code generator.

Description

technical field [0001] The present invention relates to a synchronization method and device for a wireless communication system, in particular to a synchronization method and device for a Time Division Synchronous Code Division Multiple Access (TD-SCDMA) mobile communication system. Background technique [0002] In a digital wireless communication system, a user equipment (UE) needs to detect the starting position of a data frame to realize time synchronization with a base station and system access functions. For a communication system that includes a synchronization code in the frame structure, synchronization is generally achieved by correlating a received signal of the UE with a locally generated synchronization code. In UMTS (Universal Mobile Telecommunications System, Global System for Mobile Communications) Frequency Division Duplex (FDD) system and High Code Rate Time Division Duplex (HCR-TDD) system, each base station uses a common primary synchronization code, but i...

Claims

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Application Information

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IPC IPC(8): H04B1/7073H04B7/26H04L7/02
Inventor 李烜冉晓龙茅晓泉刘栋
Owner KAIMING INFORMATION SCIENCE & TECHNOLOGY CO LTD
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