Radio frequency loopback test method and system and loopback test local oscillator providing method and apparatus

Abstract

The invention relates to a radio frequency loop-back test method, which comprises following steps: a certain clock signal is selected as local oscillator in communication system, the local oscillator and the communication system duplexer have same interval frequencies, the debugging signal is mixed to the working frequency point of receiver according to the local oscillator and transferred, the error code comparison is performed on the debugging signal. The invention relates to a radio frequency loop-back test system, which comprises a transmitting end and a receiving end, wherein, the transmitting end is used to select clock signal as the local oscillator, the local oscillator and the communication system duplexer have same interval frequencies, the debugging signal is mixed to the working frequency point of receiver according to the local oscillator and transferred; the receiving end is used for error code comparison. The invention also relates to a loop-back test local oscillator providing method and device, which comprises a first selection module and a local oscillator generation module, wherein, the first selection module is used for selecting a certain clock signal in communication system and the local oscillator generation module used for enabling the clock signal be generated into the local oscillator. The invention has an advantage of effectively overcoming the detects of high cost material, high manufacturing cost, high malfunction ratio and disperse interfered hidden danger in the prior art.

Description

technical field [0001] Embodiments of the present invention belong to the field of mobile communications, and in particular, to a method and system for radio frequency loopback testing and a method and device for providing a local oscillator for loopback testing. Background technique [0002] In order to facilitate the maintenance of the network, the transmitter and receiver of the communication system automatically detect and locate faults through the radio frequency loopback test method in the air interface (no service) state. At this time, a special loopback is added to the transmitter and receiver circuits. Test the local oscillator circuit, and mix the transmitted signal modulated into a fixed code pattern to the uplink frequency point corresponding to the receiving frequency band, and compare the bit errors after demodulation and decoding in the receiver, so as to judge the difference between the transmitter and the receiver. whether the channel is faulty. RF loopback...

AI Technical Summary

Problems solved by technology

[0009] Embodiments of the present invention provide a radio frequency loopback test method and device, and a loopback test local oscillator providing method and device, so as to solve the problem of providing a duplex interval frequency for an independent loopback test local oscillator circuit in the radio frequency loopback test process in the prior art signal and lead to costly defects

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