Frequency spectrum occupancy rate measuring method based on signal moment characteristics

Abstract

The invention discloses a method for measuring a spectrum occupancy rate based on a signal moment characteristic. The spectrum occupancy rate is measured by a relation among a channel occupancy rate p of a signal, a relative mean value muR of two moment characteristic signals and a relative variance sigmaR<2> of the signals. Spectrum signals within a specified frequency range are continuously scanned and sampled in a measurement period; an mean value mu and a variance sigma<2> of the signals of each channel are iteratively computed in a time sequence; an mean value muN and a variance sigmaN<2> of the background noise of each channel in the spectrum are obtained; and then the spectrum occupancy rate p of the signals of each channel is obtained. The method overcomes the disadvantages that the prior art sets a threshold according to the experiences, can only measure the signals with a signal-to-noise ratio greater than 15dB, stores a large amount of data and computes in an off-line manner; the provided method is less affected by the signal-to-noise ratio, the strength of the signal and the background noise, sets the threshold without manual operation, achieves quick on-line computation, has small storage and automatically computes the spectrum occupancy rate. The method can be widely applied to the fields of radio monitoring, shared spectrum access and the like.

Description

technical field [0001] The invention relates to a method for measuring radio frequency spectrum usage, in particular to a method for measuring radio frequency spectrum occupancy. Background technique [0002] Radio spectrum resources are important non-renewable resources, so effective use of spectrum is required. Spectrum occupancy is the embodiment of effective use of radio spectrum. The measurement results of spectrum occupancy can not only provide radio spectrum managers with information about the actual use of spectrum, but also facilitate radio spectrum managers to assign frequencies. Information on spectrum usage trends. At present, in the radio monitoring industry, the occupancy measurement method recommended by the International Telecommunication Union (ITU) is generally adopted for the measurement of radio signal spectrum occupancy. It measures signal occupancy by setting thresholds. [0003] Occupancy refers to the proportion of time that there is a transmitted ...

AI Technical Summary

Problems solved by technology

It is very difficult to set the threshold reasonably. If the threshold is set too high, it is easy to "lose" the signal. If the threshold is set too low, it is easy to introduce background noise and cause measurement errors.

[0010] In addition, this occupancy measurement method can only measure signals whose signal-to-noise ratio is greater than 15dB.

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