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Checking method for quadrature modulation data transmitted between baseband unit and radio frequency unit

A technology of quadrature modulation and baseband unit, applied in the field of IQ data verification, can solve the problems of only verification, no online verification, narrow data range, etc., and achieve the effect of wide data range, less resources, and simple algorithm

Inactive Publication Date: 2009-03-11
ZTE CORP
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Problems solved by technology

These verification methods all have certain deficiencies: Serdes link verification verification data range is narrow, only part of the data can be verified; PRBS verification cannot be verified online; CRC verification algorithm is too complicated

Method used

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  • Checking method for quadrature modulation data transmitted between baseband unit and radio frequency unit

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] refer to figure 1 , the verification method of the IQ data that transmits between BBU and RRU, comprises the following steps:

[0025] Step 1: Module A obtains the corresponding IQ data check value of each carrier contained in the IQ data according to the cyclic XOR method, and sends each carrier and its corresponding IQ data check value to module B;

[0026] Step 2: Module B sends each carrier wave received and its corresponding IQ data check value to module C, and calculates its corresponding IQ data check value respectively for each carrier wave received according to the cyclic XOR method, and the same The calculated value of the IQ data check value corresponding to the carrier is compared with the received value. If the two are equal, there is no problem in the transmission of the IQ data of the carrier between module A and module B. Otherwise, the IQ data ...

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Abstract

The invention discloses a calibration method of quadrature modulation data transmitted between a baseband unit and a radio frequency unit, which comprises: 1, a module A obtains IQ data calibration values corresponding to carriers, and the carriers and the corresponding IQ data calibration values are sent to a module B; 2, the module B sends the received carriers and the received corresponding IQ calibration values thereof to a module C, respectively calculates the corresponding IQ data calibration values of the received carriers, and compares the calculated values of the corresponding IQ data calibration values of one carrier with receiving values, so as to judge the transmission between the module A and the module B; 3, the module C respectively calculates the corresponding IQ data calibration values of the received carriers, and compares the calculated values of the corresponding IQ data calibration values of one carrier with receiving values so as to judge the transmission between the module B and the module C. The technical proposal of the invention realizes the on-line calibration of all IQ data.

Description

technical field [0001] The invention relates to a method for checking IQ (orthogonal modulation) data, in particular to a method for checking IQ data transmitted between a baseband unit and a radio frequency unit. Background technique [0002] With the development of mobile communications, the wireless network architecture is constantly evolving, and the wireless network architecture characterized by the separation of baseband and radio frequency has attracted more and more attention from the industry. This wireless network architecture separates BBU (Baseband Unit, baseband unit) and RRU (Remote RadioUnit, radio frequency unit). BBU is mainly composed of baseband part and switching part. RRU is mainly composed of transceiver and PA (Power Amplifier, power amplifier) and other parts. The BBU and RRU are connected through optical fiber, and the interface protocols mainly include CPRI (Common Public Radio Interface, common public radio interface), OBSAI (Open Base Station Arc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04J11/00
Inventor 揭应平赵志勇
Owner ZTE CORP
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