Multi-objective relay selection method based on quantum cat group search mechanism

Abstract

The invention provides a multitarget relay selection method based on a quantum cat group searching mechanism. The method comprises the following steps: step one, establishing a relay system model; step two, initializing three quantum cat groups; step three, updating the first quantum cat group and the second quantum cat group; step four, updating each quantum cat in the third quantum cat group; step five, placing H quantum cats updated in the third quantum cat group in a non-dominated solution set, performing non-dominated solution ordering and crowding degree computation on the quantum cats in the non-dominated solution set, retaining the former H quantum cats as the non-dominated solution, and replacing the solution group of the third quantum cat as the solution in the non-dominated solution set; step six, performing an operation on the quantum cats of the non-dominated solution set and the evolution simple target; and step seven, returning to step three if the evolution is not terminated; or stopping iterating, and outputting the non-dominated solution in the non-dominated solution set. By using the multitarget relay selection method provided by the invention, the multitarget relay selection problem is solved by simultaneously considering the output end signal to noise ratio and the network energy efficiency, the applicability is strong, and the application range is extensive.

Description

technical field [0001] The invention relates to a multi-target relay selection method, in particular to a multi-target relay selection method in the field of wireless communication. Background technique [0002] In a mobile communication system, a relay is a transmission path between two switching centers. In a cooperative multi-relay network, a reasonable selection of relay nodes can improve the system capacity, network energy efficiency and fairness among users of the cooperative communication network, save communication system energy, reduce energy consumption of data transmission and receive bit error rate etc. are of great significance. Therefore, how to choose a suitable relay node is very important for cooperative communication. [0003] In the process of signal transmission, the relay cooperative communication technology has a wide range of applications due to its flexibility and implementability. In the Ad hoc network, the relay node can amplify and forward the s...

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Problems solved by technology

"Single and multiple relay selection schemes and their achievable diversity orders" published in "IEEE Transactions on Wireless Communications" by Yindi Jing et al. proposed a relay selection scheme with the receiver signal-to-noise ratio as the optimization goal, using the best and worst channel strategy The solution only considers the signal-to-noise ratio of the channel without considering the energy efficiency of the network, and the practical usability is low

Xiaohua Li's "Optimal multiple-relay selection in dual-hop amplify-and-forward cooperative networks" published in "Electronics Letters" proposed a single-objective problem with the signal-to-noise ratio at the receiving end as the objective function, and the solution obtained is not the optimal Optimal solution, and the multi-objective problem of relay selection without comprehensive consideration of receiver signal-to-noise ratio and network energy efficiency

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