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Parallel cooperation spectrum sensing method based on genetic algorithm

A genetic algorithm and cooperative spectrum technology, applied in the field of cognitive radio spectrum sensing, can solve problems such as high throughput, without considering throughput and sensing time

Active Publication Date: 2014-12-24
HARBIN ENG UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to propose a method to overcome the shortcomings of the existing parallel cooperative spectrum sensing method that does not consider the throughput and sensing duration in the sensing of multiple heterogeneous channels, by reasonably selecting sensing nodes, allocating sensing tasks and setting the sensing duration , a genetic algorithm-based parallel cooperative spectrum sensing method based on genetic algorithms to achieve the purpose of maximizing the effective throughput of the system

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  • Parallel cooperation spectrum sensing method based on genetic algorithm
  • Parallel cooperation spectrum sensing method based on genetic algorithm
  • Parallel cooperation spectrum sensing method based on genetic algorithm

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with accompanying drawing:

[0041] The system model of the present invention is as follows:

[0042] In a centralized cognitive radio network consisting of a fusion center and N cognitive users, the sensing objects include M heterogeneous channels. Each sub-channel has a different bandwidth, a different transmission rate, and a different usage probability. H 0 and H 1 Indicates that the channel is idle and occupied by the primary user. Cognitive users are divided into perceptual time slots T in each time slot T s and transmission slot T r Two parts, T=T s +T r . In each time slot T, T s and T r Can vary within a certain range. In order to facilitate the synchronization of each node and reduce transmission overhead, T s It can only be selected among K discrete values, and each discrete value is arranged from small to large, denoted as T s (k), where k=1,2,...,K. Each cognitive user in a p...

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Abstract

The invention belongs to the technical field of radio-frequency spectrum sensing, and particularly relates to a parallel cooperation spectrum sensing method based on the genetic algorithm. The parallel cooperation spectrum sensing method includes the steps of generating an initial group, conducting individual amendment, calculating a fitness function, selecting an individual with the highest adaptability, conducting variation, struggling for existence, conducting winner intersecting, generating individuals at random, conducting individual amendment, enabling the most adaptable individual to directly enter a next generation, and stopping. By means of the parallel cooperation spectrum sensing method, the differences of different sensing users on different kinds of heterogeneous channel sensing performance, the system effective throughput and the sensing time can be sufficiently considered, and the optimal sensing strategy, namely the sensing task distribution and the sensing time length, is determined. Compared with a random sensing method, the larger system effective throughput can be obtained.

Description

technical field [0001] The invention belongs to the technical field of cognitive radio spectrum sensing, and in particular relates to a genetic algorithm-based parallel cooperative spectrum sensing method. Background technique [0002] With the rapid growth of people's demand for wireless communication, the problem of shortage of spectrum resources is becoming more and more serious. The traditional fixed spectrum allocation strategy can no longer meet people's increasing demand for spectrum. Cognitive radio technology changes the fixed spectrum allocation method in the past, enables unlicensed users to use spectrum flexibly without affecting licensed users, and provides an effective solution to the problem of shortage of spectrum resources. It is the future communication development The inevitable trend. [0003] The key and prerequisite for the realization of cognitive radio is effective spectrum sensing technology. Cooperative spectrum sensing technology is a widely use...

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Application Information

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IPC IPC(8): H04B17/00
Inventor 李一兵富爽叶方林云黄诚李一晨陈杰
Owner HARBIN ENG UNIV
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