NDLI: Performance of multitone-frequency and quadrature-amplitude modulation over Rayleigh fading channels

Content Provider	IET Digital Library
Author	Son, Jaeyong Hong, Sungnam Cheun, Kyungwhoon Yang, Kyeongcheol
Abstract	Multitone-frequency and quadrature-amplitude modulation (MFQAM) is a combination of multitone frequency-shift keying and quadrature-amplitude modulation (QAM). In this study, the authors consider MFQAM with active subcarriers grouped in balance, where the active subcarriers are divided into a specified number of groups and the same QAM symbol is conveyed by every subcarrier in each group. This grouping may make MFQAM have frequency diversity in itself. They first derive the joint probability density function of the correlator outputs of an MFQAM receiver. They then compute the channel capacity of a coded modulation (CM) system employing MFQAM over Rayleigh fading channels. As a result, they demonstrate that for a moderate code rate between 1/3 and 2/3, its normalised throughput is close to the channel capacity limit in the low signal-to-noise ratio region, contrary to a CM system employing the conventional modulation. They also evaluate the frame error rate (FER) performance of a CM system employing MFQAM when a non-binary error-correcting code is employed. Numerical results demonstrate that the normalised throughput of the CM system computed via the FER shows a similar trend to that obtained via the channel capacity.
Starting Page	1774
Ending Page	1780
Page Count	7
ISSN	17518628
Volume Number	9
e-ISSN	17518636
Issue Number	Issue 14, Sep (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/9/14
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2015.0390
Journal	IET Communications
Publisher Date	2015-07-14
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Channel Capacity Channel Capacity Limit CM System Code Coded Modulation System Error Statistics FER Forward Error Correction Frame Error Rate Frequency Diversity MFQAM MFQAM Receiver Multitone-frequency Modulation Nonbinary Error-correcting Code Probability Quadrature Amplitude Modulation Quadrature-amplitude Modulation Radio Link And Equipment Rayleigh Channel Rayleigh Fading Channel Statistics
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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