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Auxiliary synchronization channel scrambling method and corresponding cell searching mode

A secondary synchronization channel and primary synchronization channel technology, applied in the field of secondary synchronization channel scrambling method and its corresponding cell search method, to achieve the effects of interference randomization, effective interference randomization, and performance improvement

Active Publication Date: 2008-01-09
ZTE CORP
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Problems solved by technology

[0008] However, in an actual mobile communication system, it is usually necessary to solve multiple problems at the same time, such as reducing the PAPR of the transmitted signal, avoiding the detection of S-SCH short code nested combinations, and realizing adjacent Interference randomization of cells and improved performance of S-SCH coherent detection, which cannot be solved by any single current method

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  • Auxiliary synchronization channel scrambling method and corresponding cell searching mode
  • Auxiliary synchronization channel scrambling method and corresponding cell searching mode

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Embodiment Construction

[0035] First, explain the scrambling method of the present invention:

[0036] 1. Select one from 3 scrambling code sequences whose length is N to scramble the first short code sequence of S-SCH, and the selected scrambling code sequence is related to the P-SCH used by the cell (P-SCH of the present invention SCHSpecific method).

[0037]②Scramble the second short code of S-SCH by using another scrambling code with a length of N, where the scrambling code sequence used by the second short code is related to the sequence index used by the first short code (Segment- 1 Specific method).

[0038] In the second step, describe the present invention in detail in conjunction with specific processes and embodiments:

[0039] (1) The scrambling method of the secondary synchronization channel of the present invention

[0040] ① For the convenience of description, we first make the following assumptions:

[0041] Suppose the S-SCH sent by the cell consists of two short codes S 1 (k),...

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Abstract

The invention is concerned with the interference method for in-phase channel and the section search method, it is uses the P-SCH Specific method to interfere the first short code, the Segment-1 Specific method to interfere the second code, and builds cascade connection of the frequency domain; the section search method can obtain the index of the first short code by using the in-phase channel list index interrelated first interfered code list; and obtain the index of the second short code by using the primary index interrelated second interfered code list. The invention resolves the problems of collision and the first short code interference randomly, the second short code interference randomly, and also detects the S-SCH short code embed set.

Description

technical field [0001] The invention relates to mobile communication, in particular to a secondary synchronization channel scrambling method and a corresponding cell search method. Background technique [0002] When the mobile station is turned on or loses network service, it needs to acquire the system through an initial acquisition process, which means identifying the cell where the mobile station is going to standby and demodulating the system information in the broadcast channel. The acquisition process is also called a cell search process. Cell search is mainly to obtain time and frequency synchronization with the target cell, and at the same time obtain the target cell identification number and some basic information. The cell search process is mainly performed based on a Synchronization Channel (SCH for short). Generally speaking, the cell search process is a hierarchical process, so the corresponding synchronization channel (SCH) is divided into primary synchroniza...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04B7/26H04B1/7083H04J13/10
Inventor 梁春丽夏树强杨扬
Owner ZTE CORP
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