High speed frequency sweep apparatus and realization method thereof

Abstract

The invention relates to a high speed frequency sweep apparatus which comprises a data acquisition unit, a frequency selection filtering unit and a processing unit, wherein the data acquisition unit is used for acquiring a cellular network downlink signal, and after low noise amplification, the signal is sent to the frequency selection filtering unit; the frequency selection filtering unit is used for selecting different surface acoustic filters and carrying out selection of radio frequency bands under the control of the processing unit, and directly converting the signal which is subjected to radio frequency band selection into an analog baseband signal simultaneously; the processing unit controls the frequency selection filtering unit to select different surface acoustic filters and carry out the selection of the radio frequency bands, and demodulates the analog baseband signal. The invention provides the frequency sweep apparatus, high speed multichannel frequency sweep is realized, and the apparatus is suitable for communication networks of different standards.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a high-speed frequency scanning device and its implementation method. Background technique [0002] At present, with the deployment of TD-LTE in six pilot cities in China in 2011, China Mobile will simultaneously operate three generations of networks: GSM, TD-SCDMA, and TD-LTE. Within a certain period of time, China Telecom will face CDMAIS95, CDMA2000, and FDD-LTE three-generation networks, while China Unicom will simultaneously operate GSM, WCDMA, and FDD-LTE three-generation networks. [0003] The frequency scanner is a necessary measuring instrument in all stages of network construction. The application stage includes the network design stage, network construction stage, and network operation and maintenance stage. It provides reliable analysis data for network performance testing and network optimization testing. The development of test instruments will direc...

AI Technical Summary

Problems solved by technology

[0009] Superheterodyne receivers have many disadvantages: bulky, complex structure, difficult adjustment, inflexible use, high power consumption, high cost, and extremely inconvenient to carry during network construction

[0010] The single-channel frequency scanner requires a relatively high system working clock, and the scanning range is limited, the scanning speed is very slow, and the number of dots in the test process is very small, which directly affects the accuracy of the data and cannot reflect the details of network coverage.

[0011] At the same time, the communication network will transition from voice services to data and image services, which poses new challenges to the scanning speed

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