Throughput Maximization by Adaptive Switching with Modulation Coding Scheme and Frequency Symbol Spreading | Zendy

Shun Kojima | Zendy; Kazuki Maruta | Zendy; Chang-Jun Ahn | Zendy

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Throughput Maximization by Adaptive Switching with Modulation Coding Scheme and Frequency Symbol Spreading

Author(s) -

Shun Kojima,

Kazuki Maruta,

Chang-Jun Ahn

Publication year - 2018

Publication title -

journal of communications software and systems

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.191

H-Index - 13

eISSN - 1846-6079

pISSN - 1845-6421

DOI - 10.24138/jcomss.v14i4.616

Subject(s) - computer science , link adaptation , diversity scheme , subcarrier , fading , throughput , diversity gain , coding gain , multipath propagation , forward error correction , computer network , channel (broadcasting) , electronic engineering , wireless , orthogonal frequency division multiplexing , telecommunications , decoding methods , engineering

It is required to realize higher transmission rate and higher reliability for mobile communication due to the increase in Internet use. However, wireless channel capacity can not be used with maximum efficiency due to fluctuating channels affected by shadowing, multipath fading and mobility. Adaptive modulation and coding (AMC) scheme is now commonly implemented to maximize the throughput performance under the given link qualities. Forward Error Correction (FEC) based link adaptation is effective to improve throughput in a lower SNR regime, however, it immolates maximal throughput in good channel condition. Frequency symbol spreading (FSS) has been proposed that can improve BER even without FEC. It fully exploits the frequency diversity gain by spreading symbol per subcarrier to all frequency components. This paper proposes a new adaptation control scheme for OFDM by switching FSS and legacy AMC. Simulation result verifies its maximized throughput performance harvesting both of frequency diversity gain and coding gain.

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