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Multi-relay and multi-antenna-based cognitive wireless sensor network performance optimization method

A sensor network and cognitive wireless technology, applied in the performance optimization field of cognitive wireless sensor network based on multi-relay and multi-antenna, can solve the problem of reducing the accuracy of spectrum sensing results, not considering beamforming, interference between relays, etc. problem, to achieve the effect of reducing the probability of interruption, improving throughput, reducing bit error rate and probability of interruption

Active Publication Date: 2017-06-20
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0006] In the existing multi-relay technology, no relay is used for spectrum sensing, resulting in a waste of relay resources and reducing the accuracy of spectrum sensing results; and when multiple relays are selected, no relay selection is performed. It caused serious interference between a large number of relays, which hindered the improvement of the overall system performance.
At present, in the multi-relay multi-antenna cognitive sensor network, the research on the use of beamforming to enhance system performance is relatively complicated, so beamforming is not considered in the design, which makes it possible to better improve the performance of the system such as signal-to-noise ratio certain limitations

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[0051] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0052] figure 1 It is a multi-relay and multi-antenna based cognitive wireless sensor network performance optimization method flow. Cognitive users in cognitive wireless sensor networks (CRSN) need to accurately perceive changes in the status of authorized users (PUs), and increase the number of cognitive users (SUs). ) can improve the accuracy of perception results; relay communication is a powerful space diversity technology that can significantly enhance performance gains; beamforming improves the energy efficiency of the entire system while improving the signal-to-noise ratio of the target user, And can reduce interference to other users. The system model and analysis method proposed by the invention can ensure the accuracy of the perception results based on the system model, and can enhance the throughput of the whole system while reducing th...

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Abstract

The invention discloses a multi-relay and multi-antenna-based cognitive wireless sensor network performance optimization method. According to the method, a cognitive wireless sensor network system model with multiple antennas and multiple relays is adopted; multi-relay cooperative cognition, relay selection and beamforming technologies are adopted, and therefore, the throughput of a cognitive wireless sensor network system can be improved, and at the same time, the interruption probability of the system can be decreased. With the method adopted, the accuracy of sensing results of the cognitive wireless sensor network system and high spectrum utilization rate can be ensured, the throughput of the whole system can be reduced, and at the same time, the interruption probability of the overall system can be reduced.

Description

technical field [0001] The invention relates to the application field of cognitive wireless sensor network and MIMO intersecting technology, in particular to a multi-relay multi-antenna based cognitive wireless sensor network performance optimization method. Background technique [0002] Cognitive radio (CR) is a smart radio technology proposed at the end of the 20th century. Its appearance promotes the effective use of spectrum resources. Through spectrum sensing and environment adaptation, the cognitive user (SU) can use the idle licensed spectrum for information transmission without interfering with the licensed user (PU) information transmission, thereby improving the efficiency of spectrum utilization. Cognitive radio must continuously sense the surrounding spectrum environment, and it needs to accurately and reliably detect whether a PU appears in the idle spectrum. Once it detects that the PU re-uses the idle spectrum, the SU must find or wait for a new idle frequency...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/00H04W16/14H04W40/22H04W72/08H04W84/18H04B7/06H04B17/382H04W72/54
CPCH04B7/0617H04B17/382H04W4/70H04W16/14H04W40/22H04W84/18H04W72/541Y02D30/70
Inventor 岳文静黄玲玲陈志李三
Owner NANJING UNIV OF POSTS & TELECOMM
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