Cell synchronization method and initial cell searching method for broadband time-division dual-duplex cellular system

A time-division duplex, cellular system technology, applied in the field of communication, to achieve the effect of reducing related calculations

Active Publication Date: 2007-08-01
SHANGHAI ULTIMATE POWER COMM TECH
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  • Claims
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Problems solved by technology

Similarly, there is currently no scheme for initial cell search suitable for broadband ti

Method used

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  • Cell synchronization method and initial cell searching method for broadband time-division dual-duplex cellular system
  • Cell synchronization method and initial cell searching method for broadband time-division dual-duplex cellular system
  • Cell synchronization method and initial cell searching method for broadband time-division dual-duplex cellular system

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Embodiment Construction

[0042] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0043] The frame structure of the TD-SCMDA evolution system is shown in Figure 1. In Fig. 1, each wireless subframe is composed of 7 common time slots (TS0-TS6) and three special time slots. Among them, common time slots are used to transmit data, and three special time slots are DwPTS, UpPTS and GP. The DwPTS is a downlink pilot channel, which is used for sending downlink synchronization information of the system. UpPTS is an uplink pilot channel, which is used for sending uplink synchronization information for user access. The GP is a conversion guard time slot, which is used to provide a time interval for switching the downlink transmission time slot to the uplink transmission time slot.

[0044] According to the subframe structure of the TD-SCDMA evolution system in FIG. 1 above, the downlink synchronization structure of the present invention can be designed. ...

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Abstract

A small district synchronization method of wide band time duplex beehive system includes: (1) the main synchronization channel of descending synchronization channel is set in the time space DwPTS of descending guide frequency, the descending guiding frequency code which is sent at the DwPTS time space of sending the main synchronization channel is the synchronization symbol of OFDM; (2) using thepower window to search and finish the descending time gross synchronization; (3) determine accurate position of the OFDM synchronization symbol, and obtain the number of the OFDM synchronization symbol. The invention also discloses a small searching method which is suitable for the wide band time duplex beehive system and can realize the small district searching quickly and accurately.

Description

technical field [0001] The present invention relates to the communication field, in particular to a cell synchronization method and a cell initial search method, in particular to TD-SCDMA (Time Division Synchronous Code Division Multiple Access, Time Division Synchronous Code Division Multiple Access) evolution scheme in broadband time division duplex cellular systems cell synchronization method and cell initial search method. Background technique [0002] TD-SCDMA is the only one among the three major international standards of the third-generation mobile communication system that adopts time-division duplex (TDD) mode, supports uplink and downlink asymmetric service transmission, and has greater flexibility in spectrum utilization. The system comprehensively adopts advanced technologies in wireless communication such as smart antenna, uplink synchronization, joint detection and software radio, so that the system has high performance and spectrum utilization. [0003] With...

Claims

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Application Information

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IPC IPC(8): H04B7/26H04L27/26
Inventor 于洋孙韶辉王映民
Owner SHANGHAI ULTIMATE POWER COMM TECH
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