CPC (2013.01)H04W 24/08 |
7 Claims |

1. A method of processing big data for regional spectrum monitoring based on tensor decomposition, comprising the step of:
S
1: processing calibration of parameters of a spectrum monitoring station, and determining spectrum monitoring sampling point M and bandwidth B, wherein the parameters comprise a geolocation V, a synchronized clock t, a synchronized time t_{n}(0 . . . N);S
2: processing discretization of spectrum monitoring data at a sampling time completely and a structured processing of spectrum monitoring data for a monitoring period to obtain a one-dimensional spectrum monitoring sequence I_{t}_{n }at the given sampling time and a two-dimensional spectrum monitoring matrix W at the given monitoring period; andS
3: constructing a cuboid matrix Q based on the two-dimensional spectrum monitoring matrix W and processing tensor decomposition for the cuboid matrix Q,wherein step S
3 comprises the steps of:S
3.1: calculating a geographical center point V_{0 }on a geographical distribution according to latitude and longitude positions V_{n }of K number of spectrum monitoring stations, where n equals to 1, 2, 3, . . . , K, whereS
3.2: calculating the distance D_{n }between V_{n }of each spectrum monitoring station and the geographic center point V_{0}, where ∥⋅∥_{2 }is the second-order norm:D_{n}=∥V_{n}−V_{0}∥_{2 }S
3.3: along an ascending order of the distance D_{n }between the spectrum monitoring station and the geographic center point V_{0}, arranging the corresponding spectrum matrix of the station to construct the spectrum monitoring network cuboid matrix Q, where Q=[W_{1}, W_{2}, . . . W_{K}]^{T};S
3.4: performing tensor decomposition on the three-dimensional cuboid matrix Q, setting an analysis bandwidth F and dividing the cuboid matrix Q according to the analysis bandwidth F into segments, processing tensor decomposition for each segment, determining a validity of the tensor decomposition by setting MF>80% as a criterion of the validity; if MF<80%, the analysis bandwidth F is reduced to half, and the segments that does not meet the validity requirement is divided into segments according to the reduced analysis bandwidth F to re-process with tensor decomposition until the validity requirement are met or the minimum analysis bandwidth is reached;S
3.5: based on the results of tensor decomposition, calculating a center frequency, frequency occupancy, time occupancy, space occupancy of the emitter, or evaluating the environmental complexity;S
3.6: performing K-L divergence and mutual information calculations on the co-frequency emitters to identify whether it is an independent emitter or not. |