Izvorni znanstveni članak
https://doi.org/10.24138/jcomss.v14i4.616
Throughput Maximization by Adaptive Switching with Modulation Coding Scheme and Frequency Symbol Spreading
Shun Kojima
; Graduate School of Engineering, Chiba University, Japan
Kazuki Maruta
; Graduate School of Engineering, Chiba University, Japan
Chang-Jun Ahn
; Graduate School of Engineering, Chiba University, Japan
Sažetak
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.
Ključne riječi
adaptive modulation and coding; FSS-OFDM.
Hrčak ID:
209195
URI
Datum izdavanja:
3.10.2018.
Posjeta: 926 *