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FB (Frequency Correction Burst) pulse sequence search method and device

A technology of pulse sequence and search method, which is applied in the direction of digital transmission system, electrical components, modulated carrier system, etc., can solve the problems of negative gain, reduced probability of searching for FB pulse sequence, and no gain in performance, so as to reduce gain loss Effect

Inactive Publication Date: 2017-02-15
HUAWEI TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0005] When the frequency offset of the FB pulse sequence is large (for example, 10khz), the coherent accumulation of N bits will have no gain or negative gain in performance, which will greatly reduce the probability of searching for the FB pulse sequence

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  • FB (Frequency Correction Burst) pulse sequence search method and device
  • FB (Frequency Correction Burst) pulse sequence search method and device
  • FB (Frequency Correction Burst) pulse sequence search method and device

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Embodiment Construction

[0036] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0037] Before explaining the embodiments of the present invention in detail, the implementation scenarios involved in the embodiments of the present invention and some basic concepts are firstly explained.

[0038] image 3 It is the architecture diagram of the GSM communication transmitting and receiving system, including the base station and MS. Among them, the base station includes data source, encoder, modulator and radio frequency transmitter; MS includes radio frequency receiver, synchronization processor, demodulation processor and decoder. The FB search method provided by the embodiment of the present invention is applied to a synchronous processor, that is, the FB pulse sequence search device mentioned in the embodiment of th...

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Abstract

The invention discloses an FB (Frequency Correction Burst) pulse sequence search method and device and belongs to the technical field of wireless communication. The method comprises the steps of multiplying an FB signal with N ways of frequency offsets; carrying out narrowband filtration on the obtained N ways of frequency offset signals; selecting M ways of processing signals from the obtained N ways of processing signals according to a preset coherent accumulation rule; obtaining an energy absolute value of a maximum point location of each way of processing signal in the M ways of processing signals; selecting at least one way of processing signal of which energy absolute value is greater than a first threshold from the M ways of processing signals; and carrying out maximum likelihood frequency offset estimation on the at least one way of processing signal, thereby obtaining location information of an FB pulse sequence. The frequency offset of each way of the multiple ways of processing signals can be controlled in certain range, the FB pulse sequence can be searched in the relatively wide frequency offset range, and the probability of searching the FB pulse sequence is ensured.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a FB pulse sequence search method, device and equipment. Background technique [0002] GSM (Global System for Mobile Communication, Global System for Mobile Communication) is a mature second-generation communication system, and its transmission is based on TDD (Time Division Duplexing, Time Division Duplex). When an MS (Mobile station, mobile station) initially synchronizes to the network, it needs to first perform time synchronization and frequency synchronization in sequence, and then demodulate basic network information. Among them, time synchronization and frequency synchronization need to demodulate FB (Frequency Correction Burst, frequency correction burst) pulse sequence, and demodulation of basic network information needs to demodulate SB (Synchronization Burst, synchronization burst) pulse sequence. Because GSM adopts TDD transmission mode, so FB ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04B1/7183
CPCH04L27/2659H04B1/7183H04L27/2695H04L27/3854
Inventor 杨靖周佳晶张冀胡文权
Owner HUAWEI TECH CO LTD
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