Air interface signal analyzing device of TD-LTE (Time Division-Long Term Evolution) system

Abstract

The invention relates to an air interface analyzing device of a TD-LTE (Time Division-Long Term Evolution) system. The air interface analyzing device of the TD-LTE system comprises an antenna unit, wherein the antenna unit is in wireless RF (Radio Frequency) communication with an RF unit, local oscillator signals of a first local oscillator unit and a second local oscillator unit are output to the RF unit, the output end of the RF unit is connected with the input end of an intermediate frequency unit, the output end of the intermediate frequency unit is connected with the input end of a controller through a transmission unit, and the controller is connected with a display unit which is used for displaying an analyzing result through a signal hierarchical analyzing unit. According to the air interface analyzing device of the TD-LTE system, disclosed by the invention, the power of an input TD-LTE signal can be controlled through the RF unit, and the maximum input signal ability of the TD-LTE signal can be increased; and through the intermediate frequency unit, the input dynamic range of the TD-LTE signal can be increased, the parallel processing can be conducted, the analyzing function of TD-LTE air interface signals of multiple frequency points can be achieved, and the analyzing accuracy of the TD-LTE air interface signals can be increased through the method of separately processing the upstream and the downstream of the TD-LTE signal.

Description

technical field [0001] The invention relates to the field of TD-LTE systems, in particular to a TD-LTE system air interface signal analysis device. Background technique [0002] A wireless interface refers to an interface between a terminal and an access network, and is referred to as an air interface for short. In the LTE system, the air interface is the interface between the terminal and the base station, and is used to establish, reconfigure and release various radio bearer services. In addition, in order to reduce delay and improve system efficiency during LTE system design, the system does not use a central control node. One of the consequences of the lack of a central control node is that it is difficult to analyze the cause of the problem if there is a problem in the field test. The air interface test is very important. The performance has been improved accordingly, and it has become an important means of LTE system testing. [0003] For the analysis of air interfac...

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Problems solved by technology

In addition, in order to reduce delay and improve system efficiency during LTE system design, the system does not use a central control node. One of the consequences of the lack of a central control node is that it is difficult to analyze the cause of the problem if there is a problem in the field test. The air interface test is very important. It becomes an important means of LTE system testing

[0003] For the analysis of air interface data, traditional drive testers can only provide functions such as signaling flow and whether the signaling parameters are normal. The underlying analysis is all handled by the IC chip. to the upper layer, so it is impossible to analyze the errors in the physical layer and MAC layer in detail

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