Primary synchronization sequence detection method and apparatus for cell search

A primary synchronization sequence, cell search technology, applied in digital transmission systems, electrical components, modulated carrier systems, etc., to achieve the effect of low operating power consumption and reduced computational complexity

Inactive Publication Date: 2017-06-30
深圳市雷克斯托通信有限公司
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Problems solved by technology

Since the above idea effectively avoids the sliding correlation of multiple local basic main synchronization signals, the computational complexity has been improved t...

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  • Primary synchronization sequence detection method and apparatus for cell search
  • Primary synchronization sequence detection method and apparatus for cell search
  • Primary synchronization sequence detection method and apparatus for cell search

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Embodiment Construction

[0049] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, which are preferred embodiments of the present invention.

[0050] Such as figure 1 As shown, an embodiment of the present invention proposes a primary synchronization sequence detection method for cell search, including:

[0051] Step S101, separate the received signals corresponding to the selected antennas into sampling points, segment and fill the separated sampling points and local sequences according to the agreed length;

[0052] According to the 3GPP standard, LTE has 6 system bands, including 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, and 20MHz. According to the corresponding relationship between the time domain and the frequency domain, the corresponding time domain sampling rates of 1.92MHz, 3.84MHz, 7.68MHz, 15.36Hz, 23.04MHz, and 30.72MHz are required to meet the minimum subcarrier spacing of 15K.

[0053] Generally, when the transceiver is implemen...

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Abstract

The present invention relates to the technical field of wireless communication, in particular to a method and device for detecting a primary synchronization sequence for cell search, which separates the received signals corresponding to the selected antennas to sampling points, and separates the sampling points and local sequences into segments according to an agreed length and complementation; add a phase rotation value to the separated sampling points after segmentation and complementation to obtain multi-channel rotation sequences corresponding to different frequency offset values; correlate the rotation sequences with the three segmented local sequences respectively, and obtain The maximum correlation operation result is output to obtain the correlation operation result of the multi-path rotation sequence; the maximum value among the correlation operation results of the multi-path rotation sequence is taken, and the local sequence corresponding to the maximum value can determine the primary synchronization sequence of the current cell. Since the method and device process the received signal corresponding to each receiving antenna in segments, it no longer needs sample-by-sample sliding correlation, effectively reduces computational complexity, and no longer consumes a large amount of computational resources in extreme environments with large frequency offsets. circuit, operating with low power consumption.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and device for detecting a primary synchronization sequence for cell search. Background technique [0002] To access the LTE network, the user equipment UE must go through processes such as cell search, obtaining cell system information, and random access. Among them, the main purpose of cell search: obtain frequency and symbol synchronization with the cell; obtain the starting position of the downlink frame; determine the identification number of the cell with broadcast messages. [0003] A regular CP slot in the LTE system includes 7 OFDM symbols, and an extended CP slot includes 6 OFDM symbols. Each OFDM symbol is 2048-order IFFT sampling, and the sampling interval is Ts. A time-domain OFDM symbol consists of a data part and a cyclic prefix CP, where the data part has a fixed length of 2048Ts. [0004] In the FDD frame structure, a radio fr...

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Application Information

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IPC IPC(8): H04L27/00H04L27/26
CPCH04L27/2659H04L27/0014H04L27/2669H04L2027/0026
Inventor 李健胜朱玉珍
Owner 深圳市雷克斯托通信有限公司
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