Method and apparatus for determining synchronization position

Abstract

The embodiment of the invention provides a method and a device for determining synchronous position, which relates to the field of communication, and solves a problem in current technology that adjusted quantity of the obtained synchronous position is inaccurate according to a common outburst signal carrying interfering signals. The method for determining synchronous position comprises: selectinga group of training sequence with zero retardation and at least a pair of training sequences with equivalent retardation from common outburst signals; then filtration processing is carried out on thetraining sequence to obtain the training sequence after the filtration; according to the training sequence after the filtration, transient errors of the training sequence selected from the common outburst signals are obtained; according to the transient errors, synchronous position of the common outburst signals is regulated. The technical scheme provided by the embodiment of the invention can beapplied to obtaining synchronous position of the signals.

Description

Method and device for determining synchronous position technical field The invention relates to a communication system, in particular to a method and a device for adjusting the extraction position of a training sequence. Background technique In the Global System for Mobile Communication (GSM, Global System for Mobile communication), in the process of demodulating the common burst signal, the receiver acquires the synchronous position (TOA, Timeofarrival, also called the signal time of arrival) of the common burst signal, and according to the normal burst The synchronous position of the signal is used to demodulate the normal burst signal. When obtaining the synchronous position of common burst signal, due to the influence of crystal oscillator drift and signal multipath change, the synchronous position of current common burst signal is different from that of the previous common burst signal. In the (NB, NormalBurst) demodulation, the current normal burst signal is demodu...

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Problems solved by technology

In the process of realizing the present invention, the inventors have found that at least the following problems exist in the prior art: when the working environment of the receiver is a strong interference environment, there are strong interference signals in the ordinary burst signals acquired by the receiver

Performing shift correlation on the ordinary burst signal carrying a strong interference signal, the determined synchronization position of the ordinary burst signal will be inaccurate, thereby increasing the error of the demodulation of the ordinary burst signal by the receiver, or even The receiver will be out of sync and unable to work due to the continuous deviation of the synchronous position in the same direction

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