Method and device for evaluating frequency offset, and method and device for detecting master synchronization sequences

A primary synchronization sequence and frequency offset estimation technology, which is applied in the field of communication and can solve the problem of no primary synchronization sequence detection scheme.

Active Publication Date: 2011-05-04
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

[0012] Due to the particularity of the main synchronization sequence, in the prior art, there is no corresponding detection scheme for the main synchronization sequence

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  • Method and device for evaluating frequency offset, and method and device for detecting master synchronization sequences
  • Method and device for evaluating frequency offset, and method and device for detecting master synchronization sequences
  • Method and device for evaluating frequency offset, and method and device for detecting master synchronization sequences

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Embodiment Construction

[0040] In order to enable those skilled in the art to better understand the solutions of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below in conjunction with the drawings and implementations.

[0041] The primary synchronization sequence is sensitive to frequency offset. For example, taking the root sequence u=25 as an example, generate its signal sequence in the time domain, and then add frequency offsets of plus or minus 7000 Hz and plus or minus 9000 Hz to the signal sequence, respectively The frequency offset sequence is correlated to obtain the correlation value, such as image 3 shown. According to the obtained correlation values, the following conclusions can be drawn:

[0042] 1. When the frequency offset is large, a large correlation value will appear at the non-synchronous position;

[0043] 2. The position of the larger correlation value is related to the positive or negative of the freque...

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Abstract

The invention relates to the field of communication technique, and discloses a method and device for evaluating the frequency offset, and a method and device for detecting master synchronization sequences. The method for detecting the master synchronization sequences comprises the following steps: carrying out peak detection on the received data by utilizing the frequency offset sensitivity of the master synchronization sequences to obtain at least two relative power values of each master synchronization sequence and the received data, and the position corresponding to each relative power value; carrying out frequency offset evaluation on the master synchronization sequences according to the position of each master synchronization sequence; and determining the current existing information of the master synchronization sequences according to at least two relative power values of each master synchronization sequence and the received data and the frequency offset evaluation result of the master synchronization sequences. By utilizing the invention, the master synchronization sequences in an LTE (Local Thermodynamic Equilibrium) system and the approximate frequency offset value at the moment can be accurately detected.

Description

technical field [0001] The present invention relates to communication technology, in particular to a frequency offset estimation method and device, and a primary synchronization sequence detection method and device. Background technique [0002] HSPA+ is the downward evolution version of HSPA (High Speed ​​Packet Access). plan) wireless access technology will remain competitive in the coming years. In order to keep ahead in the future, 3GPP wireless access technology needs a long-term evolution process to ensure its competitiveness. In this context, 3GPP established the LTE project, which aims to introduce a new wireless air interface and various advanced technologies in order to achieve greater transmission rate, smaller access delay and greater system capacity. [0003] The LTE (Long Term Evolution, long term evolution) system includes two working modes: TDD (Time Division Duplexing, time division duplexing) and FDD (Frequency Division Duplex, frequency division duplexin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04B7/26
Inventor 郭华永罗新邓瑞楠
Owner DATANG MOBILE COMM EQUIP CO LTD
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