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Open AccessArticle

Transmission Performance of an OFDM-Based Higher-Order Modulation Scheme in Multipath Fading Channels

1
Department of Information and Communications Engineering, Kogakuin University, Tokyo 163-8677, Japan
2
Graduate School of Engineering, Kogakuin University, Tokyo 163-8677, Japan
*
Author to whom correspondence should be addressed.
J. Sens. Actuator Netw. 2019, 8(2), 19; https://doi.org/10.3390/jsan8020019
Received: 26 February 2019 / Revised: 20 March 2019 / Accepted: 24 March 2019 / Published: 27 March 2019
(This article belongs to the Special Issue Trends, Issues and Challenges toward 5G and beyond)
Fifth-generation (5G) mobile systems are a necessary step toward successfully achieving further increases in data rates. As the use of higher-order quadrature amplitude modulation (QAM) is expected to increase data rates within a limited bandwidth, we propose a method for orthogonal frequency division multiplexing (OFDM)-based 1024- and 4096-QAM transmission with soft-decision Viterbi decoding for use in 5G mobile systems. Through evaluation of the transmission performance of the proposed method over multipath fading channels using link-level simulations, we determine the bit error rate (BER) performance of OFDM-based 1024- and 4096-QAM as a function of coding rate under two multipath fading channel models: extended pedestrian A (EPA) and extended vehicular A (EVA). We also demonstrate the influence of phase error on OFDM-based 1024- and 4096-QAM and clarify the relationship between phase error and the signal-to-noise ratio (SNR) penalty required to achieve a BER of 1 × 10−2. This work provides an effective solution for introducing higher-order modulation schemes in 5G and beyond. View Full-Text
Keywords: mobile communication; higher-order modulation; 1024- and 4096-QAM; OFDM; multipath fading channels; SNR penalty; link-level simulations mobile communication; higher-order modulation; 1024- and 4096-QAM; OFDM; multipath fading channels; SNR penalty; link-level simulations
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Otsuka, H.; Tian, R.; Senda, K. Transmission Performance of an OFDM-Based Higher-Order Modulation Scheme in Multipath Fading Channels. J. Sens. Actuator Netw. 2019, 8, 19.

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