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Synchronous processing method and system

A technology of synchronization processing and primary synchronization channel, applied in the field of communication, can solve problems such as unfavorable detection of synchronization signals, inability to achieve multi-cell energy enhancement, synchronization detection complexity, etc., achieve low sequence complexity, improve timing synchronization performance and cell search. performance effect

Active Publication Date: 2008-06-11
HUAWEI TECH CO LTD
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Problems solved by technology

[0009] Although the above implementation method improves the problem of channel mismatch, multiple PSCs cannot achieve the effect of multi-cell energy enhancement, which is not conducive to the detection of synchronization signals, and the increase in the number of PSCs will also bring the complexity of synchronization detection

Method used

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  • Synchronous processing method and system

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Embodiment Construction

[0040] The present invention divides the P-SCH in each frame into two parts. The first part of P-SCH uses a common PSC to map to the subcarrier of the OFDM symbol, and the second part of P-SCH selects a PSC from multiple PSCs to map to On the sub-carriers of the OFDM symbols, the OFDM symbols in the time domain are converted and sent to the user equipment for processing, which improves the timing synchronization performance and cell search performance of the synchronization system.

[0041] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0042] refer to figure 1As shown, a communication system in this example includes: a base station 100 and a user equipment 101 . The base station 100 is located in the universal terrestrial radio access network E-UTRAN, and is used for receiving uplink data sent by the user equipment 101 and sending downlink data to the user equipment 101 . Wherein, when the ba...

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Abstract

The invention discloses a synchronizing process method, which is used to solve the problem in the prior art that when a single PSC is used, P-SCH channel estimation can not be matched with an actual unicast channel, so a coherent detection is not supported, and when a plurality of PSCs are used, the energy of multi-cells can not be strengthened, so a synchronizing detection becomes difficult. The method comprises that: the serial PSC used by a main synchronizing channel P-SCH is mapped to a sub-carrier of an OFDM symbol, wherein, the first part of P-SCH in each frame uses a public PSC to map, the second part of P-SCH can select one PSC from a plurality of PSCs to map; time domain OFDM symbols are formed according to all sub-carriers of various frames and transmitted. Meanwhile, the invention discloses a base station, user equipment and a communication system.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a synchronization processing method and system. Background technique [0002] In the fourth-generation wireless mobile communication system, the main physical layer technology OFDM (Orthogonal Frequency Division Multiplexing) is a mobile communication technology that uses parallel transmission to increase the communication data rate. In order to ensure the orthogonality between subcarriers, the OFDM system requires very precise time-frequency synchronization, so the synchronization technology is one of the key technologies of the OFDM system. In a wireless communication system, when a user initially accesses a network, the downlink synchronization process is mainly completed through a synchronization channel (SCH, Synchronization Channel). [0003] In the OFDM system, the SCH occupies part of the bandwidth of the system center in the frequency domain, and occupi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04B7/26
CPCH04L27/261
Inventor 胡正磊
Owner HUAWEI TECH CO LTD
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