VDLM2 radio station channel busy / idle detection method based on busy threshold dynamic update

Abstract

The invention discloses a VDLM2 radio station channel busy / idle detection method based on busy threshold dynamic update, which comprises the following steps: based on continuous RSSI sampling, acquiring multiple RSSI sampling values by a very high frequency mode two-radio station system through an RSSI linear detection circuit within a preset time range; calculating an average value of multiple RSSI sampling values, and determining an initial silence value of the system; judging whether the symbol head of the receiver is synchronized or not, if the synchronization is successful, directly reporting a channel busy state, and continuing to receive data to perform synchronization judgment; otherwise, according to the receiving power at the current moment and the system initial silence value, updating the channel silence value at the next moment based on a channel silence value dynamic updating method; updating a channel busy threshold value in real time; and finally, detecting a channel busy / idle state according to the receiving power on the channel and a channel busy threshold value and reporting the channel busy / idle state. According to a channel silence value dynamic updating method, the channel busy threshold value is dynamically updated, so that the system can detect the channel busy / idle state more accurately.

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