A channel selection method based on spectrum prediction and perceptual fusion

Abstract

The invention discloses a channel selection method based on spectrum prediction and perception fusion, which performs statistical estimation on three parameters of average occupancy probability Po, average remaining communicable time length Tl and average signal-to-noise ratio SNR of each channel in channel set C based on historical data of spectrum monitoring. The detection probability of each channel in the channel set C in the prediction stage is obtained by frequency spectrum prediction. By predicting the occupancy of the channel in the future, the unavailable channels are excluded from the sensing queue and the spectrum sensing time is reduced. After the spectrum sensing is completed, the results of spectrum sensing and spectrum prediction are fused according to certain rules, which can reduce the misjudgment caused by missed detection and false alarm, improve the detection performance of channel state, and quickly find high-quality available channels for the link establishment process.

Description

technical field [0001] The invention belongs to the field of wireless communication, in particular to a spectrum prediction and perception and optimal channel selection method, in particular to a channel selection method based on spectrum prediction and perception fusion. Background technique [0002] Spectrum prediction and spectrum sensing are two main methods to obtain the spectrum situation. Simply put, spectrum sensing obtains the current spectrum state through different signal detection methods, while spectrum prediction is to mine the internal correlation of historical spectrum data or regularity to obtain the future state of the spectrum in advance. [0003] There are problems of missed detection and false alarms in both spectrum prediction and spectrum prediction. Missed detection means that the channel has been occupied but not predicted or detected. Using this channel will conflict with the transmission of the channel-occupied user. False alarm means that the chan...

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Problems solved by technology

[0003] Both spectrum prediction and spectrum prediction have the problem of missed detection and false alarm. Missed detection means that the channel has been occupied but not predicted or detected. Using this channel will conflict with the transmission of the channel-occupied user, while false alarm means that the channel Originally idle, but the prediction or detection result is an occupied state, and the user will miss the opportunity to use the channel

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