Transmitting cross modulation device and method of test terminal

Abstract

The invention discloses a transmitting cross modulation device and method of a test terminal. The method comprises the steps that a first power combiner receives the output signal of a first system simulator SS_P, the output signal of a second system simulator SS_S and the interfering carrier, combines the output signal of the SS_P, the output signal of the SS_S and the interfering carrier and transmits a composite signal to a first branching unit; one path is transmitted to a first circulator and the other path is transmitted to a second circulator through the first branching unit; the first circulator transmits the composite signal to a first port of the terminal and transmits the signal output from the first port to a second branching unit; the second circulator transmits the composite signal to a second port of the terminal and transmits the signal output from the second port to a third branching unit; the second branching unit transmits one path to the receiving end of the SS_P and transmits the other path to a carrier frequency analyzing instrument; the third branching unit transmits one path to the receiving end of the SS_S and transmits the other path to the carrier frequency analyzing instrument.

Description

technical field [0001] The present invention relates to carrier aggregation technology, in particular to a device and method for testing terminal transmission intermodulation. Background technique [0002] At present, with the rapid development of mobile communication, the amount of information communicated by users is increasing, the signal rate is continuously increasing, and the transmission bandwidth is becoming wider and wider. For this reason, the fourth generation mobile communication system adopts the key technology carrier aggregation. [0003] Corresponding to this technology, each terminal manufacturer has different modulation and demodulation schemes. How to accurately and effectively test and verify the quality of end products has become more and more complicated. For example: WCDMA (Wideband Code Division Multiple Access) adopts the key technology DC-HSUPA (Dual-Carrier High-Speed ​​Uplink Packet Access). Although the dual-carrier technology is applied, the t...

AI Technical Summary

Problems solved by technology

Therefore, the results cannot be obtained intuitively and quickly

Especially when the intermodulation products output by PCC and SCC are at the same frequency, it is very inconvenient to calculate whether the synthesized interference signal exceeds the standard

[0013] In short, the existing test scheme, due to the complexity of the test connection, will affect the test accuracy

An overly idealized solution is not conducive to verifying the basic capabilities of the terminal

Use the spectrum analyzer at the same time and use switching to test separately, which is inefficient

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