Method and device for detecting common-frequency cells of LTE system

Abstract

The embodiment of the invention discloses a method for detecting common-frequency cells of an LTE system. The method comprises the steps that received first time domain data are segmented and transformed into a frequency domain, first correlation operation is carried out on each segment of data transformed to the frequency domain and a local reference primary synchronizing signal (PSS), a result of the first correlation operation is transformed back to a time domain, and second time domain data are obtained; power of all sampling points in the second time domain data is calculated, power delay profiles (PDP) of the sampling points are obtained, and peak mean ration (PMR) values of all the sampling points are calculated according to the power delay profiles (PDP); the primary synchronizing signal (PSS) and the synchronous position of the primary synchronizing signal (PSS) in a half frame are determined according to the point with the largest the peak mean ration (PMR) value; a secondary synchronizing signal (SSS) is determined according to the primary synchronizing signal (PSS) and the synchronous position of the primary synchronizing signal (PSS) in the half frame, and therefore the common-frequency cells are determined. The embodiment of the invention further discloses a device for detecting the common-frequency cells of the LTE system. The LTE common-frequency cells can be effectively detected, and the requirement for measuring the common-frequency cells, covered with a wireless network, of the existing LTE system can be met.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a method and device for detecting same-frequency cells in an LTE system. Background technique [0002] With the formulation and continuous improvement of the 3GPP LTE standard, the LTE (Long Term Eolution, long-term evolution) system has been supported by more and more operators and manufacturers, and has now become the mainstream standard of 4G wireless communication technology. More than 200 LTE commercial network. Under the active promotion of domestic operators, TD-LTE and FDD LTE commercial networks have been partially opened. In order to make full use of the precious bandwidth resources of LTE, the same-frequency technology has become the most commonly used LTE networking solution. During the initial stage of actual network construction and maintenance, it is usually necessary to measure LTE co-frequency cells, including cell ID, received signal str...

AI Technical Summary

Problems solved by technology

However, this detection method usually directly detects the primary synchronization signal PSS in the time domain, which requires a large amount of calculation and low detection accuracy.

Images