Method for reducing adjacent area interference in wireless communication downlink synchronization channel
A synchronous channel and wireless communication technology, applied in the field of communication, can solve the problems of detection interference, increase the probability of detection error, increase the complexity, etc., and achieve the effect of reducing adjacent cell interference, low complexity, and improving detection performance
Active Publication Date: 2013-03-20
ZTE CORP
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Problems solved by technology
Since the two interfering cells belong to the same cell group and transmit the same SSCH combination, the superposition will cause great interference to the UE's detection of the SSCH of the target cell 3, resulting in increased detection error probability and longer cell search time
[0006] The above problems can be solved by scrambling the SSCH sequence, but there are certain defects in scrambling, which will increase the complexity and reduce the cross-correlation performance of the SSCH sequence
Method used
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[0042] The present invention enables the three cells in a cell group to use different system information mapping methods to map the system information of each cell to its Secondary Synchronization Channel (SSCH) sequence, so that the three cells in a cell group can The SSCH sequences used are all different. The system information mapping method used by each cell has a corresponding relationship with its cell ID, that is, there is a one-to-one correspondence with the PSCH sequence of the cell, so that the interference of adjacent cells can be randomized.
[0043] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0044] refer to figure 2As shown, it is a schematic diagram of the frame structure of the wireless communication downlink synchronization channel marked in the present invention, and illustrates a frame structure of the downlink synchronization channel. It can be seen that the SSCH sequen...
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The invention is concerned with the neighbor section interference reducing method of the wireless communication downriver in-phase channel. It includes: Ensuring the main in-phase channel serial according to the section symbol n; Marking the wireless frame transmit the assistance in-phase channel serial for the first time opposite section symbol n as the serial number group (Sn, 1(t), Sn, 2(t)), and the second time list as the serial number group (Sn, 3(t), Sn, 4(t)); Mapping the section symbol group information and the frame timing information to the assistance in-phase channel serial opposites the section symbol n in different method; During the transmission, the firs sub frame sends the main in-phase channel serial before sends the serial number as (Sn, 1(t), Sn, 2(t)); until the sixth sub frame sends the serial number as (Sn, 3(t), Sn, 4(t)).
Description
technical field [0001] The present invention relates to the communication field, in particular to a method for reducing adjacent cell interference in a wireless communication downlink synchronous channel. Background technique [0002] The main function of the downlink synchronization channel of wireless communication is to perform the function of cell search, and its purpose is to obtain timing and other related system information. Generally, the synchronization channel is divided into two parts: a primary synchronization channel (Primary Synchronization Channel, PSCH for short) and a secondary synchronization channel (Secondary Synchronization Channel, SSCH for short). The primary synchronization channel sequence generally carries cell identification (ID) information, that is, there is a one-to-one correspondence between the primary synchronization channel sequence and the cell ID, and it is mainly used for timing and frequency offset estimation. The secondary synchronizat...
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IPC IPC(8): H04B7/26
Inventor 夏树强杨扬梁春丽
Owner ZTE CORP