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Broadband collaboration spectrum sensing method under large/small-scale fading channels

A technology of cooperative spectrum sensing and fading channels, which is applied in the field of broadband cooperative spectrum sensing in fading channels of large and small scales, and can solve problems such as no consideration

Active Publication Date: 2015-06-10
XIDIAN UNIV
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Problems solved by technology

However, both Hussain S and Wang Q did not consider the influence of propagation distance and path loss exponent caused by different propagation paths on the reported channel bit error rate in large-scale fading channels

Method used

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  • Broadband collaboration spectrum sensing method under large/small-scale fading channels
  • Broadband collaboration spectrum sensing method under large/small-scale fading channels
  • Broadband collaboration spectrum sensing method under large/small-scale fading channels

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Embodiment Construction

[0058] Concrete implementation steps of the present invention are as follows:

[0059] Such as figure 1 As shown, the present invention is a broadband cooperative spectrum sensing method under large and small scale fading channels, and the method includes the following steps:

[0060] S1 builds a wideband cooperative spectrum sensing system model under large and small scale fading channels;

[0061] S2 is divided into L narrowband spectrums according to the wideband spectrum, and divides the secondary users into L clusters;

[0062] The wideband spectrum includes L narrowband spectrums, and the secondary users are divided into corresponding L clusters according to the principle of the smallest distance according to the number of narrowband signals.

[0063] S3 Under the small-scale fading channel, each secondary user uses the method of energy detection to sense the narrowband spectrum;

[0064] The small-scale fading channels of the secondary user include Rice fading channe...

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Abstract

The invention discloses a broadband collaboration spectrum sensing method under large / small-scale fading channels. The broadband collaboration spectrum sensing method includes steps that constructing a broadband collaboration spectrum sensing system model under large / small-scale fading channels; dividing the spectrum into L narrow-band spectra, and dividing a secondary user into L clusters; under the small-scale fading channel, using the clusters to sense different narrow-band spectra; using 'or rule' to fuse and judge the information of each cognitive user at the cluster head of each cluster to finish the spectrum sensing in the cluster; enabling each cluster head to send the sensing information in the cluster to a fusion center through the large-scale fading channel, and enabling the fusion center to gather the sensing information of each narrow-band spectrum to realize the sensing for the broadband spectrum. The broadband collaboration spectrum sensing method under large / small-scale fading channels is capable of sensing the broadband spectrum; the sensing performance is good under large / small-scale fading channel environments.

Description

technical field [0001] The invention belongs to the technical field of communications, and in particular relates to a broadband cooperative spectrum sensing method under large and small scale fading channels. Background technique [0002] In a cognitive radio network, in order not to cause harmful interference to the primary user, the cognitive user needs to judge whether the primary user exists through spectrum sensing. Accurate spectrum sensing can improve the access opportunities of cognitive users and improve the utilization of spectrum resources without causing interference to primary users. Due to the randomness of the relative positions of the cognitive user and the primary user, the wireless channel between them is also random. Compared with ideal channels, fading channels have a greater impact on the reliability of spectrum sensing. [0003] For small-scale fading channels or shadow fading channels, a single cognitive user is affected by the wireless channel envir...

Claims

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Application Information

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IPC IPC(8): H04B17/382H04B17/336
Inventor 刘明骞陈健李军芳
Owner XIDIAN UNIV
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