Test device and method for implementing the TD-SCDMA RF front-end full duplex

Abstract

The invention relaets to a full-duplex test device and method for a TD-SCDMA RF front end, in which a signal resource sends a frame of test signal with uplink data and downlink data, the signal then is passed through a power divider and transmitted to a downlink input Tx port of a RF front end FE module to be an input signal of a downlink, another pathway of signal is passed through a separator and circulator, then transmitted to an uplink input Rx port of the FE module to be as an input signal of an uplink, the FE module is synchronous with the signal resource thereby ensuring the uplink signal and the downlink signal have noninterferencen, an uplink output signal of the Rx port and a downlink output signal of an Ant port are passed through a multiplexing device and transmitted to a spectrum analyzer, a test result of the uplink and dowlink are readed by modifying a time slot of current test. The invention realizes full-duplex test of the FE module, the test result has more authenticity, test of the uplink and dowlink can be realized only by once connection, thereby the test efficiency is largely enhanced in an automatic test system.

Description

Technical field [0001] The invention relates to a full duplex test device and method for realizing a radio frequency front end in a TD-SCDMA system. Background technique [0002] TD-SCDMA is one of the three major standards of the third-generation mobile communication air interface technical specifications officially released by the International Telecommunication Union ITU. Its key technologies include time division duplex technology, smart antenna technology, and joint detection technology that can adjust the upstream and downstream switching points. The advantages of TD-SCDMA are prominently manifested in a good balance between system anti-interference and system capacity, efficient support for mixed services, and the system itself has good sustainable development and technological evolution. [0003] The multiple access scheme of TD-SCDMA belongs to DS-SCDMA, with a chip rate of 1.28Mc / s, a spread spectrum bandwidth of about 1.6MHz, and a frequency divi...

AI Technical Summary

Problems solved by technology

In fact, the real working environment of the RF front-end is that there are both uplink data and downlink data. The traditional test method cannot truly reflect the RF performance of the RF front-end; Operation, which greatly affects the test efficiency in automated testing, and the use of RF matrix, the cost is too high

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