Universal standing-wave ratio detection method for TDD-LTE RRU and FDD LTE RRU

A technology for VSWR detection and return loss, applied in wireless communication, transmission monitoring, electrical components, etc. Effect

Inactive Publication Date: 2018-03-16
WUHAN POST & TELECOMM RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] The embodiment of the present application solves the problem that the standing wave ratio detection of TD-LTE and FDD-LTE RRU

Method used

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  • Universal standing-wave ratio detection method for TDD-LTE RRU and FDD LTE RRU
  • Universal standing-wave ratio detection method for TDD-LTE RRU and FDD LTE RRU

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Embodiment Construction

[0041] The embodiment of the present application solves the problem in the prior art that the standing wave ratio detection of TD-LTE and FDD-LTE RRU cannot be realized simultaneously by providing a general standing wave ratio detection method of TDD and FDD LTE RRU.

[0042] The technical solution of the embodiment of the present application is to solve the above-mentioned technical problems, and the general idea is as follows:

[0043] A general standing wave ratio detection method for TDD and FDD LTE RRU, comprising the following steps:

[0044] Step 1. Obtain the time delay T between the downlink signal and the previous reverse link signal dl ;

[0045] Step 2, obtain the configuration information of the cyclic prefix of the LTE wireless frame, and obtain the PBCH signal duration T according to the configuration information of the cyclic prefix PB ;

[0046] Step 3, the CPU sends a signal through the FPGA to switch the switch of the feedback link to the forward directio...

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Abstract

The invention belongs to the technical field of mobile communication, and discloses a universal standing-wave ratio detection method for a TDD-LTE RRU and an FDD LTE RRU. The method comprises the steps that the delay time of a downlink signal and forward and reverse link signals is acquired; configuration information of a cyclic prefix and the time of a PBCH signal are acquired; a CPU switches a switch of a feedback link to be in a forward direction; an FPGA acquires a forward signal; the FPGA truncates out the PBCH signal through a 1.08M-bandwidth digital filter at a signal center frequency point, reads the PBCH signal and converts the PBCH signal to obtain a forward power value; the CPU switches the switch of the feedback to be in a reverse direction; a reverse power value is obtained ina similar way; a return loss value is acquired; calibration is conducted according to a return loss calibration value to obtain an actual return loss value; and a standing-wave ratio detection resultis acquired. According to the method, standing-wave ratio detection on the TDD-LTE RRU and standing-wave ratio detection on the FDD LTE RRU FDD LTE RRU can be achieved simultaneously, and the detection accuracy can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a general standing wave ratio detection method of TDD and FDD LTE RRU. Background technique [0002] LTE is the long-term evolution of the UMTS technical standard formulated by the 3GPP organization, which is currently called 4G. Including TDD (Time Division Duplex), FDD (Frequency Division Duplex) two duplex modes. The FDD (Frequency Division Duplex)-based LTE is FDD-LTE. The feature of the FDD mode is that the system simultaneously receives and transmits on two separate symmetrical frequency channels, and uses guaranteed frequency bands to separate the receiving and transmitting channels. The TDD mode is characterized by receiving and transmitting in different time domains, and there is isolation protection between the receiving and transmitting time domains. [0003] The commonly used terms in the field of LTE technology are introduced as follows: [0004] 1. R...

Claims

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Application Information

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IPC IPC(8): H04B17/10H04W24/08
CPCH04B17/103H04W24/08
Inventor 向奇徐宁何涛勇
Owner WUHAN POST & TELECOMM RES INST CO LTD
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