High-efficiency spectrum resource sensing equipment

Abstract

The invention discloses high-efficiency spectrum resource sensing equipment. The high-efficiency spectrum resource sensing equipment comprises a sensing antenna, a band-pass filter, a square-law detector, an integrator and a decision device which are sequentially connected in series; the sensing antenna comprises a high gain antenna body, a low gain antenna body and a conversion device; and both the high gain antenna body and the low gain antenna body are coupled with the band-pass filter through the conversion device and controlled by the conversion device to be connected or disconnected withthe band-pass filter, the conversion device is provided with a control end, the control end is coupled with the decision device, and when the control end receives a communication signal output by thedecision device, the conversion device connects the high gain antenna body with the band-pass filter. According to the high-efficiency spectrum resource sensing equipment, by arranging the high gainantenna body, the low gain antenna body and the conversion device, the high gain can be efficiently used in the communication process, and therefore the communication quality is well guaranteed.

Description

technical field [0001] The present invention relates to a spectrum sensing device, in particular to a high-efficiency spectrum resource sensing device. Background technique [0002] In the process of cognitive radio operation, spectrum sensing occupies a very important position. As the basic basis for frequency hopping in cognitive radio, the accuracy of spectrum sensing and the speed of sensing will affect the communication efficiency of cognitive radio. Therefore, the higher the working efficiency of the spectrum sensing device, the smoother the cognitive radio communication process and the higher the communication speed, so the requirements for the existing spectrum sensing device are relatively high. [0003] Among the existing spectrum sensing technologies, using energy detection algorithm for spectrum sensing is a relatively common way. The principle of energy detection algorithm is to use the antenna to receive the energy of the external radio spectrum, and then judge...

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Problems solved by technology

[0003] Among the existing spectrum sensing technologies, the use of energy detection algorithms for spectrum sensing is a commonly used method. The principle of energy detection algorithms is to use antennas to receive the energy of the external radio spectrum, and then judge the channel energy at this time. To determine whether the radio spectrum is idle or not, in the prior art, in order to expand the spectrum sensing distance and range of the spectrum sensing device, an antenna is basically connected to the spectrum sensing device to perform spectrum sensing, and in the sensing process First, the electromagnetic wave is converted into high-frequency current through the antenna, and then the high-frequency current is band-pass filtered through the band-pass filter, and then the corresponding energy is calculated for a period of time through the integration of the square law device and the integrator, and finally through a decision device To determine whether the energy reaches the channel where the primary user exists. When the channel is judged to be idle, the effect of judging whether the primary user exists through energy detection is realized in this way. After the channel detection is completed, the decision device will output a communication The signal is connected to the network, and then wireless communication is carried out through the antenna, so the antenna gain strength at this time directly affects the communication quality, and the existing antenna gain is fixed. If the antenna gain is increased for communication quality, it will lead to In the process of spectrum sensing, the energy of the high-frequency current input into the band-pass filter becomes larger, so that the energy of the finally detected channel in the idle state will also exceed the energy when the primary user exists, so there will be The problem of misjudgment of idle channels, and the use of antennas with normal gain, will cause the problem of poor communication quality caused by weak signals during the communication process

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