td-scdma repeater uplink switching time measuring system and method

Abstract

The present invention relates to a repeater uplink switching time measurement system and method, comprising: two TD-SCDMA signal generators, two CW signal generators, a repeater to be tested and an auxiliary repeater, and a donor end of the auxiliary repeater Connect the spectrum analyzer; the downlink signal from the second TD-SCDMA signal generator and the second CW signal generated by the second CW signal generator are combined and input to the donor end of the repeater to be tested, and the repeater to be tested is used The uplink switch control signal output on the synchronization board replaces the uplink switch control signal of the auxiliary repeater; the uplink signal from the first TD-SCDMA signal generator and the first CW signal generated by the first CW signal generator are combined and input The retransmission end of the auxiliary repeater realizes the test of the uplink switching time of the repeater to be tested through the auxiliary repeater and the spectrum analyzer. Compared with the traditional test link, the complexity is reduced, and the test efficiency and accuracy are improved.

Description

technical field [0001] The invention relates to a repeater switch time test technology, in particular to a TD-SCDMA repeater uplink switch time test system and a repeater uplink switch time test method based on the system. Background technique [0002] The test method of repeater switch accuracy is tested in accordance with the provisions of 6.16 of the People's Republic of China Communication Industry Standard - 2GTD-SCDMA Digital Cellular Mobile Communication Network Repeater Technical Requirements and Test Methods. [0003] Index requirements: 1) The time advance of the uplink and downlink opening of the repeater and the lag of the closing time should be greater than 2μs; 2) The switching point of the uplink and downlink switch falls in the TD-SCDMA frame, and the interval between the corresponding uplink and downlink switching points should not be less than 3μs ; 3) The rising edge and falling edge of the power switch are within 90% power of the starting point lower than...

AI Technical Summary

Problems solved by technology

The link in the middle is long and complicated, and the calibration of the instrument is difficult and inaccurate

[0011] 2. The requirements for the isolation of the circulator are very high, and the signal may be fed back to the instrument after being amplified by the repeater, causing the instrument to burn out

[0012] 3. Due to the difficult and inaccurate accuracy of the instrument, the accuracy of the data obtained from the test is low, which directly affects the debugging of the repeater, and at the same time affects the frequency spectrum index, peak code domain error and other indicators of the repeater, and ultimately affects to the stability and service life of the repeater

[0013] 4. The link signal is too long, which increases the complexity of problem analysis, and the thinking is prone to confusion, so it is impossible to accurately locate the problem

The above test methods have low accuracy and complex test links, and may cause hidden dangers of instrument burnout. Therefore, how to improve the existing test methods and optimize the test link design has always been a research topic in the industry.

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