Real-time capture pulse signal power device and its realization method

Abstract

The invention discloses a real-time pulse signal power capturing device which comprises a radio frequency receiving module, an industrial personal computer control module, a digital intermediate-frequency module, a local oscillator module, a reference module and an EISA bus, wherein the digital intermediate-frequency module, the local oscillator module and the reference module are connected with the radio frequency receiving module, and the EISA bus is in communication with the modules. An uplink signal of a mobile terminal is converted into fixed intermediate frequency through twice of frequency mixing in the radio frequency receiving module and then transmitted to an FPGA through an A / D converter, and the FPGA is controlled through software to achieve real-time pulse signal power capturing index testing. The invention further discloses a real-time pulse signal power capturing method. A tested terminal, a terminal comprehensive measuring device and the real-time pulse signal power capturing device are connected through a power divider, and after a signaling link is built, the tested terminal receives a TPC command sent by the comprehensive measuring device so that uplink service time slot power can change according to preliminary settings. Start frames of the real-time pulse signal power capturing device are synchronized, signal power adjusting moment is judged according to a power threshold algorithm, a power value is captured, calculated and stored in a double-port RAM, and data are read through master control software.

Description

technical field [0001] The invention relates to the technical field of mobile communication terminal indicator testing, in particular to a device for capturing pulse signal power in real time and an implementation method thereof. Background technique [0002] At present, mobile communication terminal test instruments generally test the terminal uplink transmit signal power (signaling / non-signaling mode) according to 3GPP TS34.120 / 2 / 3 or TS 36.521-1 and other conformance specifications. For the "radio frequency conformance" terminal test instrument, develop the test case "TPC (Transmit Power Control, terminal uplink transmission power control)" of the application scenario. In the signaling mode, the synchronization signal is provided by the baseband (physical layer); in the non-signaling mode (or without external synchronization signal) When performing "TPC" test on the terminal, if only relying on "power level" trigger to obtain the synchronization signal, it can work normal...

AI Technical Summary

Problems solved by technology

For the "radio frequency conformance" terminal test instrument, develop the test case "TPC (Transmit Power Control, terminal uplink transmission power control)" of the application scenario. In the signaling mode, the synchronization signal is provided by the baseband (physical layer); in the non-signaling mode (or without external synchronization signal) When performing "TPC" test on the terminal, if only relying on "power level" trigger to obtain the synchronization signal, it can work normally when the signal is large, but when the signal is small (the signal-to-noise ratio is poor), it will cause false triggering. sync signal error

Therefore, devices that rely on external synchronization signals for pulse signal capture have poor flexibility and scope of application.

In addition, foreign vector signal analyzers generally do not provide power detection functions with real-time automatic capture "graph mode", and can only randomly capture pulse signals by increasing the scan time, but this solution is limited by data storage capacity and cannot flexibly capture any Time length signal, and the graphical display of random capture is not convenient for testers to observe the signal and analyze the terminal performance indicators

Images