Real-time continuous wide-band wire-less transmitting detection method and apparatus

Abstract

Carrying out down-conversion for radio frequency CW signal to mid frequency, and carrying out sampling at high speed after demodulation process obtains data of field intensity distribution. GPS data are sampled at testing point synchronistically. Statistical analysis is carried out for data of field intensity at all testing points combined with GPS data. The said statistical analysis is in use for wireless transmission characteristic statistics and channel model correction. Collection controller in multithread working mode guarantees sampling both signal of field density and GPS positioning information synchronistically. Two sampling procedures are noninterfered. In testing RF signal propagation, the invention solves issue of sampling signal of field density and sampling GPS information at testing location synchronistically. The invention realizes consecutive collection of data of field density.

Description

technical field [0001] The invention relates to the testing field of wireless communication, in particular to a test device capable of completing the collection of original signals of wireless propagation fading test effects, storage, statistical distribution analysis and display of field strength coverage effects, and a propagation test method using the test system. Background technique [0002] In the wireless propagation test, the basic measurement method should be able to timely and accurately measure, record and analyze the received real-time signals and their changes. Therefore, the test method must meet the following requirements: 1. The power of the transmitting antenna is known, and the measured The time remains constant; 2. The test antenna must be able to receive all target signals from the receiving antenna. [0003] At present, there are corresponding drive test coverage equipment for mature standards of mobile communication systems such as GSM, WCDMA, and CDMA2...

AI Technical Summary

Problems solved by technology

However, for these mature drive test coverage equipment, the base station transmits a signal with a certain modulation mode, and its transmission power changes from time to time, which cannot guarantee the condition of "the signal remains constant within the measurement time".

Moreover, the current drive test systems are all aimed at mature standards such as GSM, WCDMA, and CDMA2000. The wireless frequency bands tested are fixed and cannot be applied to wireless signal propagation tests and model corrections in other frequency bands.

Using existing instruments, such as spectrum analyzers, field strength meters, etc., although it is possible to test the field strength of wireless signals within a wide frequency range, the tester can only manually configure the screen and read the test value through the instrument screen. The process is time-consuming and labor-intensive, prone to human error, and the massive test results can only be analyzed after all the tests are completed, so real-time testing cannot be realized

[0004] In short, there is still a lack of a test system that can flexibly adjust test frequency points within a wide frequency range, collect wireless signals in real time, continuously, and at high speed, and record GPS information at test points at the same time

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