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Downlink exposure reduction in dual-hop OFDM decode-and-forward relay systems | IEEE Conference Publication | IEEE Xplore

Downlink exposure reduction in dual-hop OFDM decode-and-forward relay systems


Abstract:

Dual-hop OFDM based decode-and-forward (DF) relay system is adopted as a solution for extension of coverage area and performance improvement in LTE-Advanced systems. Whil...Show More

Abstract:

Dual-hop OFDM based decode-and-forward (DF) relay system is adopted as a solution for extension of coverage area and performance improvement in LTE-Advanced systems. While the benefits of dividing the communication link between the base station (source - S) and end-user (destination - D) through implementation of relay (R) station are clear, there is still a certain public concern about the exposure to electromagnetic fields (EMF) originating from R, as it is located closer to end-users than base station. Thus, in this paper we propose implementation of multiple antennas at R station and transmit antenna selection (TAS) on subcarrier basis in downlink (DL) communication for reducing exposure from R. We have developed simulation model for the proposed system, with real-case simulation parameters given in LTE-Advanced relay reference scenario. The results obtained for the system with 3 antennas at R, show that the proposed solution provides reduction for more than 36% of the power transmitted from R, and thus reduction in EMF exposure originating from R, compared to OFDM DF relay system without TAS, while keeping the same level of ergodic capacity.
Date of Conference: 25-28 August 2015
Date Added to IEEE Xplore: 19 April 2016
ISBN Information:
Electronic ISSN: 2154-0225
Conference Location: Brussels, Belgium

References

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