PLNC-OFDM双向多中继系统中的联合子载波抑制与中继选择

doi:10.3969/j.issn.0255-8297.2016.01.004

Abstract

Abstract: This paper deals with the joint subcarrier suppression and relay selection (JSSRS) problem in two-way orthogonal frequency division multiplexing (OFDM) relaying system based on physical layer network coding (PLNC) with the decode-and-forward protocol over a multipath Rayleigh fading channel. Two JSSRS schemes are proposed:JSSRS with a fixed threshold (FT-J) and JSSRS with a fixed number of subcarriers (FNS-J). In a two-way information exchange process, FT-J suppresses subcarriers by keeping the suppression threshold invariant, and FNS-J suppresses subcarriers by keeping the number of suppressed subcarriers invariant. In other words, FNS-J keeps the number of active subcarriers constant and the suppression threshold value varying. Simulation results show that FT-J and FNS-J can improve efficiency and enhance reliability of a two-way OFDM relaying system based on PLNC as compared with traditional subcarrier suppression schemes.

Key words: physical layer network coding, relaying system, subcarrier suppression, relay selection

CLC Number:

TN911.7

SHEN Xian-li, XIE Wei, XU You-yun, XU Kui, ZHANG Dong-mei. Joint Subcarrier Suppression and Relay Selection for Two-Way OFDM Relaying System with PLNC[J]. Journal of Applied Sciences, 2016, 34(1): 30-41.

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Joint Subcarrier Suppression and Relay Selection for Two-Way OFDM Relaying System with PLNC

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