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Threshold adaptation energy detection method

An adaptive threshold and energy detection technology, applied in the field of wireless communication, which can solve problems such as errors and PU communication interference

Inactive Publication Date: 2012-01-18
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

Since the energy received by the SU is a random chi-square distribution, when the PU is actually using the spectrum, the energy detected by the SU may be Y0 The result of the judgment; thus, SU starts to use the spectrum and interferes with the communication of PU

Method used

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Embodiment Construction

[0049] The present invention will be further described in detail below in conjunction with test examples and specific embodiments. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0050] refer to figure 1 , where PU (Primary User) represents the primary user, SU_S (Secondary User’s Sender) represents the transmitting end of the secondary user, SU_R (Secondary User’s Reciever) represents the receiving end of the secondary user, γ ps Indicates the signal-to-noise ratio between the master user and the slave user transmitter, γ pr Indicates the signal-to-noise ratio between the master user and the receiver of the slave user, γ sr Indicates the signal-to-noise ratio between the user's transmitter and receiver.

[0051] Consider a cognitive wireless network that ...

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Abstract

The invention discloses a threshold adaptation energy detection method. In the energy detection method, a parameter computing scheme for an offline energy judgment threshold decision function and an online energy judgment threshold judgment scheme are sequentially realized. In the threshold adaptation energy detection method provided by the invention, the energy judgment threshold decision function is offline established, a value of an energy judgment threshold is dynamically regulated according to different signal to noise ratios, and online judgment is performed, so the intellectualization level of a cognitive radio user is improved, false alarm probability Pf(xi) is decreased to maximize the average data transmission rate of a secondary user (SU), energy overhead required in a running process is decreased, and an average value of false dismissal probability Pm(xi) is limited within a preset probability threshold range to avoid excessive interference in a primary user (PU).

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to an energy detection method with an adaptive threshold. Background technique [0002] With the rapid development of wireless communication technology and network, the number of wireless users has increased sharply, the business forms accessed through wireless network are becoming more and more diversified, and the system has higher and higher bandwidth requirements, which makes spectrum resources very tight. . In addition, with the broadbandization of wireless networks and the gradual evolution of IP-based and integrated data, services, and networks, people have higher and higher requirements for bandwidth and spectrum utilization. Cognitive radio is a very potential technical means to solve the problems of unbalanced use of spectrum and low utilization rate of spectrum. At present, a typical application of cognitive radio is opportunistic spectrum access. Its core idea is ...

Claims

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Application Information

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IPC IPC(8): H04B17/00H04B17/382
Inventor 凌翔吴斌鲍志强潘莉丽
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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