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Synchronizing process, frequency deviation estimation method, synchronizing apparatus, frequency deviation estimation apparatus

A frequency offset estimation and synchronization signal technology, applied in the direction of synchronization devices, digital transmission systems, electrical components, etc., to achieve the effect of improving accuracy

Inactive Publication Date: 2012-10-03
ST ERICSSON SEMICON BEIJING
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  • Description
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Problems solved by technology

However, this method is highly sensitive to frequency offsets between transceivers

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  • Synchronizing process, frequency deviation estimation method, synchronizing apparatus, frequency deviation estimation apparatus
  • Synchronizing process, frequency deviation estimation method, synchronizing apparatus, frequency deviation estimation apparatus
  • Synchronizing process, frequency deviation estimation method, synchronizing apparatus, frequency deviation estimation apparatus

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Embodiment Construction

[0077] A core of the present invention is that when calculating the cross-correlation between the received sequence and the local feature sequence, the received sequence is segmented, multiple cross-correlation values ​​are calculated by segmenting, and then the peak value is calculated by using the sum of the squares of the modules to obtain the position of the synchronous signal .

[0078] Another core of the present invention is to use the banner characteristic of the synchronous signal to combine the segmented correlation values ​​and construct two vectors with only phase difference to obtain the frequency offset estimation range.

[0079] Compared with the traditional synchronization method using a single cross-correlation value, the invention improves the robustness to frequency offset.

[0080] In order to enable those skilled in the art to better understand the solution of the present invention, the implementation of the present invention will be further described in d...

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Abstract

The invention provides a synchronizing method, a frequency deviation estimating method, a synchronizing device and a frequency deviation estimating device, wherein, the synchronizing method comprises: performing the low pas filter on the received sequence and obtaining the low frequency receiving sequence; respectively multiplying the slide receiving sequence which is obtained after the low frequency receiving sequence slide with the same length of the local characteristic sequence with the local characteristic sequence and obtaining the product sequence; segmenting the product sequence according to a first segmenting rule, and summing the sequence after segmenting, obtaining the correlation sequence of the first segment; detecting the position of the synchronizing signal according to theobtained maximum crest of the first segment correlation sequence. According to the invention, the received sequence is divided into a plurality of segments, which is processed with the related operation, to solve the defect of being more sensitive on the frequency deviation between the transreceivers when performing the related computation on the one-segment sequence through the traditional technique, advance the accuracy of time synchronism and frequency deviation estimation.

Description

technical field [0001] The present invention relates to the field of wireless communication systems, in particular to a downlink synchronization method and frequency offset estimation applied in the 3rd Generation Partnership Project Long-Term Evolution (3GPP LTE, 3rd Generation Partnership Project Long-Term Evolution) system for initial cell search Method and device for applying the method. Background technique [0002] With the development of society and the advancement of technology, people's requirements for mobile communications are constantly increasing, and it is hoped that the system can provide large-capacity, high-speed, and low-latency data transmission services. In order to meet this growing demand. The 3GPP organization has proposed a long-term evolution plan (LTE) of the 3G system. The LTE system adopts the transmission technology of Orthogonal frequency-division multiplexing (OFDM, Orthogonal frequency-division multiplexing). robustness. However, such syst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/26H04L7/00
Inventor 翟海涛冯心睿牟秀红
Owner ST ERICSSON SEMICON BEIJING
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