FQAM : A modulation scheme for beyond 4G cellular wireless communication systems

Hong, Sung-Jong; Sagong, Min; Lim, Chiwoo; Cheun, Kyungwhoon; Cho, Sunghye

doi:10.1109/glocomw.2013.6824956

Cited by 17 publications

(1 citation statement)

References 14 publications

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“…If the Turbo-FSK scheme can be easily integrated in an OFDM framework thanks to its use of the FSK (which can be implemented using the fast Fourier transform (FFT) algorithm), it nonetheless lacks the flexibility offered by the NB-IoT solution. An interesting option is therefore to associate this technique with alphabet hybridation [16][17][18][19], which will improve the flexibility of the scheme. This hybridation of the FSK modulation, so-called Coplanar FSK [20], can be done while maintaining the constant envelope property, which gives a significant advantage to the Turbo-FSK technique.…”

Section: Introductionmentioning

confidence: 99%

Contender waveforms for Low-Power Wide-Area networks in a scheduled 4G OFDM framework

Roth

Doré

Ros

et al. 2018

EURASIP J. Adv. Signal Process.

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When designing new solutions for Low-Power Wide-Area (LPWA) networks, coexistence and integration into existing 4G frameworks should be considered to ease the deployment procedure and reduce costs. In a previous work, Turbo-FSK was proposed as a potential physical layer for LPWA networks. With its constant envelope and high energy efficiency, the scheme is a serious contender for this type of networks. We propose to study the system in the Orthogonal Frequency Division Multiplexing (OFDM) framework, currently used by existing cellular networks and also considered for the recently standardized Narrow-Band IoT (NB-IoT). Several extensions of the Turbo-FSK scheme are presented. A hybrid modulation alphabet, combining orthogonal with linear modulations, is introduced, and the substitution of Frequency Shift Keying (FSK) modulation for another orthogonal modulation based on Zadoff-Chu (ZC) sequences is considered. Simulations are run under various conditions including Rayleigh fading channel with mobility, demonstrating that the Turbo-FSK scheme is able to achieve performance close to the Turbo Coded Orthogonal Frequency Division Multiplexing (TC-OFDM) when a low rate is considered. When considering hybridation of the alphabet, limitations appear for higher data rate, which can be overcome by changing the orthogonal alphabet. The study of the variation of the envelope of the compared solutions emphasizes the crucial trade-off between performance and efficiency of the power amplifier (PA), a main concern for low-power applications. While using the proposed solutions, we demonstrate that energy consumption can be reduced by up to a factor of 2.5.

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Section: Introductionmentioning

confidence: 99%

Contender waveforms for Low-Power Wide-Area networks in a scheduled 4G OFDM framework

Roth

Doré

Ros

et al. 2018

EURASIP J. Adv. Signal Process.

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Future Mobile Communication: From 4G To 5G, 5G Enabling Techniques

Luntovskyy¹,

Spillner

2017

Architectural Transformations in Network Services and Distributed Systems

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A Generalized Bit Error Rate Evaluation for Index Modulation Based OFDM System

et al. 2020

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Orthogonal frequency division multiplexing (OFDM-IM) is a multicarrier transmission technology that modulates information bits not just onto subcarriers by means of M-ary constellation mapping but also onto selected (active) subcarrier indices. Consequently, errors can occur in OFDM-IM systems indices in addition to the errors of M-ary symbols. This paper analyzes the error scenarios and derives mathematical expressions for the error performance based on the maximum likelihood (ML) detection. In evaluating the bit error rate (BER) in the additive white Gaussian noise (AWGN) channel, some assumptions are made and our analytical result show that the BER of OFDM-IM system is a weighted sum of exponential functions and Q-functions. Our general BER expression has been shown to be in excellent agreement with numerical simulation and proven to be accurate and can serve as a reference for the design and evaluation of any arbitrary size and configuration of OFDM-IM systems.

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FQAM : A modulation scheme for beyond 4G cellular wireless communication systems

Cited by 17 publications

References 14 publications

Contender waveforms for Low-Power Wide-Area networks in a scheduled 4G OFDM framework

Contender waveforms for Low-Power Wide-Area networks in a scheduled 4G OFDM framework

Future Mobile Communication: From 4G To 5G, 5G Enabling Techniques

A Generalized Bit Error Rate Evaluation for Index Modulation Based OFDM System

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