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Method and device for acquiring signal channel

A channel and starting position technology, applied in the field of capturing channels, can solve problems such as high computational complexity

Active Publication Date: 2015-02-04
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

[0005] Embodiments of the present invention provide a method and device for capturing channels to solve the problem of high computational complexity when capturing channels with sine wave characteristics

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  • Method and device for acquiring signal channel
  • Method and device for acquiring signal channel
  • Method and device for acquiring signal channel

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Embodiment Construction

[0024] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0025] In the embodiment of the present invention, a detection time window is defined. In each detection time window, starting from the initial position of the detection time window, obtain the sampling values ​​of m consecutive sampling points of the signal received at the set frequency point, select an extreme value point from it, and use the extreme value point as the starting point, extract the last sampling point among the m consec...

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Abstract

The invention relates to the field of wireless communication, in particular to a method and a device for acquiring a signal channel to solve the problem of high operational complexity of acquisition of the signal channel with sinusoidal wave characteristics. The method includes the steps: acquiring sampling values of m continuous sampling points of signals received at a set frequency point from an initial position of a current detection time window and selecting an extreme point from the m continuous sampling points; extracting a final sampling point from the m continuous sampling points obtained by sampling and taking the extreme point as a starting point, and counting the number of the sampling points meeting a first condition extracted from the current detection time window; determining that a target signal channel is acquired when the counted number of the sampling points meeting the first condition is larger than a first set threshold value. Therefore, compared with the prior art, operational complexity is reduced, and signal channel acquisition efficiency can be improved.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method and device for acquiring a channel. Background technique [0002] GSM (Global System for Mobile communication, Global System for Mobile Communication) is the most widely used wireless communication standard in the world. In the GSM system, the receiver completes the frequency synchronization and time synchronization with the system by capturing FCCH (Frequency Correction Channel, frequency calibration channel) and SCH (Synchronization Channel, synchronization channel). Synchronize timing and frequency offset, and then obtain SCH to get accurate frame position. It can be seen that the acquisition (English: acquisition) channel is a necessary process before a bearer MS (Mobile Station, mobile station) accesses a communication system cell. [0003] In the existing technology, the envelope detection method is used to capture FCCH. The principle is: every 4 sampling po...

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Application Information

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IPC IPC(8): H04L7/00H04W56/00
Inventor 张洪利赵德香王文静
Owner DATANG MOBILE COMM EQUIP CO LTD
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