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IEICE TRANSACTIONS on Communications

Throughput Comparisons of 32/64APSK Schemes Based on Mutual Information Considering Cubic Metric

Reo KOBAYASHI, Teruo KAWAMURA, Nobuhiko MIKI, Mamoru SAWAHASHI

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Summary :

This paper presents comprehensive comparisons of the achievable throughput between the 32-/64-ary amplitude and phase shift keying (APSK) and cross 32QAM/square 64QAM schemes based on mutual information (MI) considering the peak-to-average power ratio (PAPR) of the modulated signal. As a PAPR criterion, we use a cubic metric (CM) that directly corresponds to the transmission back-off of a power amplifier. In the analysis, we present the best ring ratio for the 32 or 64APSK scheme from the viewpoint of minimizing the required received signal-to-noise power ratio (SNR) considering the CM that achieves the peak throughput, i.e., maximum error-free transmission rate. We show that the required received SNR considering the CM at the peak throughput is minimized with the number of rings of M = 3 and 4 for 32-ary APSK and 64-asry APSK, respectively. Then, we show with the best ring ratios that the (4, 12, 16) 32APSK scheme with M = 3 achieves a lower required received SNR considering the CM compared to that for the cross 32QAM scheme. Similarly, we show that the (4, 12, 20, 28) 64APSK scheme with M = 4 achieves almost the same required received SNR considering the CM as that for the square 64QAM scheme.

Publication
IEICE TRANSACTIONS on Communications Vol.E95-B No.12 pp.3719-3727
Publication Date
2012/12/01
Publicized
Online ISSN
1745-1345
DOI
10.1587/transcom.E95.B.3719
Type of Manuscript
Special Section PAPER (Special Section on Coding and Coding Theory-Based Signal Processing for Wireless Communications)
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