The invention relates to an LTE-U
idle channel evaluation method based on a multi-slot
fusion mechanism, and belongs to the technical field of LTE-U (
LTE in unlicensed spectrum) in mobile communication. An LTE-U
system works in an unauthorized frequency range, and before the
system access a channel,
idle channel evaluation is needed generally. The LTE-U
system divides the whole CCA window into multiple slots; sampling data of the multiples slots is used to generate a sampling matrix, a
covariance matrix of the sampling data is calculated to obtain characteristic values, the characteristic values in ascending order are used to carry out unequal weighting on the corresponding slots, and the channel state evaluation performance when the CCA window is not completely aligned with a data packet is improved. The
idle channel evaluation method can be used to improve the accuracy of channel state determination effectively, reduce the possibility of data
packet collision among different systems, and the improves the
spectral efficiency that the LTE-U system and a WIFI system coexist in the same channel in the unauthorized frequency range.