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Cooperative spectrum sensing method utilizing space diversity

A technology of cooperative spectrum sensing and space diversity, which is applied in the field of cooperative spectrum sensing using space diversity to achieve the effect of reducing data transmission overhead

Inactive Publication Date: 2014-06-25
NINGBO UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a cooperative spectrum sensing method using space diversity, which can obtain good performance when the noise power value is unknown

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  • Cooperative spectrum sensing method utilizing space diversity
  • Cooperative spectrum sensing method utilizing space diversity
  • Cooperative spectrum sensing method utilizing space diversity

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Embodiment Construction

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0018] A cooperative spectrum sensing method using space diversity proposed by the present invention, its flow chart is as follows figure 1 As shown, the processing process is as follows: first, the sensing nodes participating in the cooperative spectrum sensing calculate the power value of the received signal; then, the sensing nodes participating in the cooperative spectrum sensing send the power value of the received signal to the fusion center; then, The fusion center calculates the test statistic value according to the power value of the signal received by the sensing nodes participating in the cooperative spectrum sensing; finally, the fusion center judges whether there is an authorization in the signal received by the sensing node by comparing the test statistic value with the judgment threshold. User signals to realize spectrum sensing...

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Abstract

The invention discloses a cooperative spectrum sensing method utilizing space diversity. The method comprises the steps that sensing nodes participating in cooperative spectrum sensing calculate power magnitudes of received signals, the sensing nodes participating in cooperative spectrum sensing send the power magnitudes of the received signals to a fusion center, the fusion center calculates an inspection statistics magnitude according to the power magnitudes of the signals received by the sensing nodes participating in cooperative spectrum sensing, and finally, the fusion center judges whether an authorized user signal exists in the signals received by the sensing nodes to achieve spectrum sensing by comparing the inspection statistics magnitude with a judgment threshold. The method has the advantages that the noise power magnitude does not need to be known, and the performance is close to that of the energy inspection method based on soft combination with the noise power magnitude known.

Description

technical field [0001] The invention relates to a spectrum sensing technology in a cognitive radio system, in particular to a cooperative spectrum sensing method utilizing space diversity. Background technique [0002] Improving the utilization of wireless spectrum resources is one of the important research directions of wireless communication. The cognitive radio system greatly improves the utilization of wireless spectrum resources by making full use of the licensed frequency bands in the idle state. In order to avoid excessive interference to licensed users, cognitive radio systems need to perform spectrum sensing on licensed frequency bands. [0003] Cooperative spectrum sensing can solve the problem of hidden terminals. Energy detection method based on soft joint is a common collaborative spectrum sensing method. If there is no licensed user signal information, but the noise power value is known, then the energy detection method based on soft union has the optimal pe...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/00H04B7/08H04B17/382
Inventor 金明李有明金光王刚王晓丽
Owner NINGBO UNIV
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