Unlock instant, AI-driven research and patent intelligence for your innovation.

Method of DwPTS synchronization in initial search of TD-SCDMA cell

A TD-SCDMA, initial search technology, applied in the field of DwPTS location synchronization, can solve the problems of difficult to achieve commercial software or hardware processing capability and high cost, and achieve the effect of reducing the amount of calculation, facilitating implementation, and simplifying the processing flow

Inactive Publication Date: 2008-01-02
ZTE CORP
View PDF4 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Such a large calculation needs to be completed within a few subframes, which is difficult to achieve with existing commercial software or hardware processing capabilities, and even if achieved, the cost is high

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method of DwPTS synchronization in initial search of TD-SCDMA cell
  • Method of DwPTS synchronization in initial search of TD-SCDMA cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] At first, explain the present invention thought and concrete mathematical method: (1) consider in the frame structure of TD-SCDMA, as shown in Figure 1 and Figure 2, in TD-SCDMA pilot subframe, downlink pilot time slot DwPTS On the left side of SYNC_DL, there is a guard interval Gguard Period of 32 chips chips, referred to as GP. On the right side of SYNC_DL, there is a GP of 96 chips at the junction of UpPTS and DwPTS. The length of SYNC_DL itself is 64 chips. In the pilot time slot UpPTS, since the received power of GP is very small, and the SYNC_DL code segment data is transmitted at full power, from the perspective of power spectrum and time distribution of received power, there are the following power distinguishing features: ①Compared with GP The power of the SYNC_DL segment is higher than that of the SYNC_DL segment, and the power of the SYNC_DL segment forms a peak value relative to the GPs on both sides; ②The signal in the UpPTS is an uplink signal with similar ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a DwPTS synchronize method in the initial search of TD-SCDMA region, comprising that according to the power differential characters of SYNC_DL with GP at two edges, using the power shape of receiving signal to search the position of SYNC_DL, using one group of system SYNC_NL code in terminal according to appointed accuracy demand to correlate the data in the position, according to the calculated maximum correlative value and relative position information, finding the SYNC_DL and relative accurate position. The invention can fully utilize the power characters of SYNC_DL and GP to reduce the calculation of DwPTS synchronization, to simplify process and easy application on terminal.

Description

technical field [0001] The invention relates to a TD-SCDMA mobile communication system, in particular to a DwPTS position synchronization method in the initial synchronization of a cell of a mobile terminal in the TD-SCDMA mobile communication system. Background technique [0002] Time division synchronous code division multiple access TD-SCDMA mobile communication system is the only TDD duplex standard among the 3G standards that my country may adopt at present. The same carrier frequency does not need to be paired in the uplink and downlink, and it is easy to obtain frequency resources. Its goal is to Build an advanced mobile communication system with high spectral efficiency and high economic benefits. Therefore, TD-SCDMA combines advanced technologies such as smart antennas, joint detection, and dynamic channel allocation in FDMA, TDMA, CDMA, and TDD modes. [0003] Most of the traditional initial cell search methods for TD-SCDMA are based on the method of correlation ca...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04B1/707H04W56/00
Inventor 陈禹陈月峰杨海涛
Owner ZTE CORP