Reliability of D2D System Related to Distance in Rayleigh Fading Channel
Received date: 2017-08-25
Revised date: 2017-10-03
Online published: 2018-05-31
Under the control of the base station, both sides of the device-to-device (D2D) communication can communicate directly without going through the base station. In order to improve the system capacity, the system reliability and the diversity gain, this paper introduces a relay technology into D2D communication system, and adopts relay strategies including amplify-and-forward mode and decode-and-forward mode. Considering the influence of relay position on the reliability of D2D system, this paper establishes a distance model and derives the formula of the outage probability of the system under different conditions in Rayleigh fading channel. Simulation results show that relay technology can effectively reduce the outage probability in the case of low system channel target rate, that the closer to the midpoint of the D2D communication link the relay node, the lower the outage probability, and that the reliability of the communication relay system is better than that of the non-relayed D2D communication system.
Key words： rayleigh fading; relay; reliability; distance; device-to-device (D2D)
LIU Jin, ZHAO Jun-hui, LIU Yun-yi . Reliability of D2D System Related to Distance in Rayleigh Fading Channel[J]. Journal of Applied Sciences, 2018 , 36(3) : 431 -442 . DOI: 10.3969/j.issn.0255-8297.2018.03.003
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