A Channel Monitoring System Based on Channelized Spectrum Sensing

Abstract

The invention discloses a channel monitoring system based on channelization frequency spectrum perception. The channel monitoring system comprises a high-speed ADC sampling module, a channelization structure and an uniformization iteration energy detection module. The high-speed ADC sampling module is used for performing AD sampling and analog-to-digital conversion so as to obtain digital complex baseband signals. The channelization structure is used for determining AD sampling frequency and feeding back the sampling frequency to the high-speed ADC sampling module, and is also used for dividing channels into D channelization branches by using a traditional Fourier-domain lowpass prototype filter via the multiphase filtering technology, and sending to-be-monitored channel information of the digital complex baseband signals into corresponding channelization branches for monitoring output. The uniformization iteration energy detection module is used for performing energy detection for output results of the channelization structure according to the uniformization iteration energy detection algorithm, thereby achieving noise power value estimation of each of the channelization branches. The channel monitoring system is easy to achieve, requires less on hardware facilities, is highly reliable in channel monitoring and has high robustness.

Description

technical field [0001] The invention relates to the technical field of aviation wireless communication, in particular to channel monitoring technology in wireless communication, and is a channel monitoring system based on spectrum sensing and digital channelization structure. [0002] technical background [0003] In wireless communication, channel monitoring technology is one of the key technologies in this field, and the quality of the channel is the key to the reliable transmission of information. [0004] In order to cope with the complex electromagnetic environment, the line-of-sight airborne link data terminal has designed multiple available channels. High-sensitivity wideband RF receivers are susceptible to interference from intentional or unintentional band suppression, in which case the sensitivity of the RF receiver will be greatly degraded. The channel monitoring equipment designed based on spectrum sensing technology can perceive the surrounding spectrum environm...

AI Technical Summary

Problems solved by technology

[0006] Channel monitoring is divided into analog monitoring and digital monitoring. Analog monitoring uses narrowband filtering and channel power detection in the analog domain. It is necessary to equip each channel to be monitored with corresponding narrowband filters and power detectors. The hardware design is complicated and the cost is high. Large; digital monitoring samples the radio frequency signal after down-conversion, converts it into a digital signal, and realizes the performance estimation of each channel in the digital domain. The advantage is that the hardware design is simple, but the data collected by high-speed AD must be real-time Processing, otherwise the data is easy to lose, which requires higher performance of subsequent devices such as FPGA or DSP

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