Cooperative spectrum detection method, cooperative spectrum sensing apparatus and spectrum detection system

A detection method and joint spectrum technology, which is applied in the field of idle spectrum detection, can solve the problems of complexity reduction and high performance, and achieve the effect of taking into account speed and performance, and high effectiveness

Inactive Publication Date: 2011-11-16
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0005] In the existing spectrum detection, a single spectrum sensing algorithm cannot achieve complexity reduction and high performance at the same time

Method used

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  • Cooperative spectrum detection method, cooperative spectrum sensing apparatus and spectrum detection system
  • Cooperative spectrum detection method, cooperative spectrum sensing apparatus and spectrum detection system
  • Cooperative spectrum detection method, cooperative spectrum sensing apparatus and spectrum detection system

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Embodiment Construction

[0044] Such as figure 1 The shown spectrum detection system for cognitive radio includes a sensing channel radio frequency circuit and a baseband board, and the sensing channel radio frequency circuit includes a receiving antenna, a pre-processing unit, and a channel selection processing unit. The pre-processing unit includes a band-pass filter and an amplifier; the channel selection processing unit includes an adjustable down-conversion module, an automatic frequency control module (AFC), and an automatic gain control module (AGC). The baseband board includes an analog-to-digital converter (ADC) and a joint spectrum sensing device; the joint spectrum sensing device includes a rough measurement module, a fine measurement module, and a channel selection control module. In this embodiment, the joint spectrum sensing device is implemented solely by FPGA. Of course, the joint spectrum sensing device can also be implemented by DSP alone or jointly implemented by DSP and FPGA.

[0...

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Abstract

The invention provides a method which is used to realize spectrum detection with a high performance simply and rapidly in a cognitive radio system, a cooperative spectrum sensing apparatus which is used to realize the method and a spectrum detection system. A cooperative spectrum detection method is characterized by: firstly, roughly measuring a channel to be measured by using a energy detection algorithm; when the channel is occupied according to the measuring result, finishing the spectrum detection; when the channel is not occupied, accurately measuring by using a correlation detection algorithm. In the invention, energy detection with simple operations is basis; correlation characteristics of the signal are fully used to complete detection work of idle spectrums; detection can be completed in a short time; validity of the detection is high, speed of the detection is fast and performance of the detection is good.

Description

technical field [0001] The invention belongs to the communication technology, and in particular relates to the idle frequency spectrum detection technology in the cognitive radio system. Background technique [0002] A cognitive radio system is an intelligent wireless communication system. It can perceive the external environment, and use artificial intelligence technology to learn from the environment, by changing certain operating parameters (such as transmission power, carrier frequency and modulation technology, etc.) , in order to achieve highly reliable communication at any time and any place and the effective use of spectrum resources. [0003] An important prerequisite for the realization of cognitive radio is to have spectrum sensing capability. By performing spectrum detection on the surrounding environment, it is possible to search for free spectrum that can be used for business communication of the cognitive radio system. At the same time, in order not to caus...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/00H04W24/00H04B17/382
Inventor 戴道瀚潘小锋杨松刘皓李少谦
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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