Frequency spectrum perception method and apparatus based on channel cluster

A spectrum sensing and clustering algorithm technology, applied in the field of spectrum sensing methods and devices based on channel clustering, can solve problems such as ignoring channel correlation, and achieve the effect of saving time and energy and reducing the number

Active Publication Date: 2014-07-30
BEIJING UNIV OF POSTS & TELECOMM
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  • Frequency spectrum perception method and apparatus based on channel cluster
  • Frequency spectrum perception method and apparatus based on channel cluster
  • Frequency spectrum perception method and apparatus based on channel cluster

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Embodiment Construction

[0050] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0051] The embodiment of the present invention proposes a spectrum sensing method based on channel clustering, such as figure 1 shown, including the following steps:

[0052] S1: Make statistics on the historical occupancy status of each channel according to the historical detection data;

[0053] S2: Calculate the correlation coefficient between any two channels according to the historical occupancy status of each channel; specifically include:

[0054] Obtain the historical occupancy state vector of each channel;

[0055] Calculate the correlation coefficient ρ between any two channels according to the historical occupancy state vector of each channel ij ,

[0056]

[0057] Among them, ρ ij is the correlation coefficient between channel i and channel j, Indicates the state of the i-th channel in the m-th time slot, Indicates the state of th...

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Abstract

The invention relates to a frequency spectrum perception method and apparatus based on a channel cluster. The method comprises: according to historical detection data, counting the historical occupation state of each channel; according to the historical occupation state of each channel, respectively calculating a correlation coefficient between any two channels; according to the correlation coefficient, utilizing a channel cluster algorithm perform clustering on the channels, and generating a predetermined number of types; respectively selecting one detection channel from each type, and detecting the occupation states of the detection channels; according to the occupation states of the detection channels, performing occupation state intra-type estimation on other channels beside the detection channel in each type by use of an intra-type estimation algorithm; and according to the historical occupation states of each channel, performing occupation state self-estimation on other channels beside the detection channel in each type; and unifying two estimation results through a minimum entropy aggregation method. By using the method and apparatus provided by the invention, the quantity of the channels needing detection is substantially reduced, and enormous time and energy are saved for a frequency spectrum perception process.

Description

technical field [0001] The present invention relates to the technical field of spectrum sensing, in particular to a method and device for spectrum sensing based on channel clustering. Background technique [0002] With the rapid growth of radio communication traffic, the problem of spectrum shortage is becoming more and more serious. By studying the spectrum detection results of various countries in the world, it is found that the utilization rate of licensed frequency bands is generally low. However, the fixed spectrum allocation policy makes the licensed frequency bands with low utilization rate unable to be used by unlicensed users when they are idle, resulting in a great waste of resources. The emergence of cognitive radio technology provides a good way and solution for this kind of problem. [0003] In cognitive radio, secondary users can dynamically access licensed frequency bands without interfering with licensed user communications, thereby improving channel utiliz...

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Application Information

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IPC IPC(8): H04W24/00H04L1/00
CPCY02D30/70
Inventor 冯志勇张轶凡田玉成高明菲晏潇
Owner BEIJING UNIV OF POSTS & TELECOMM
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