Code-division multiple-access multiuser demodulator by using quantum fluctuations

Otsubo, Yosuke; Inoue, Jun-ichi; Nagata, Kenji; Okada, Masato

doi:10.1103/PhysRevE.90.012126


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Code-division multiple-access multiuser demodulator by using quantum fluctuations

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/57442

Title:	Code-division multiple-access multiuser demodulator by using quantum fluctuations
Authors:	Otsubo, Yosuke Browse this author
	Inoue, Jun-ichi Browse this author →KAKEN DB
	Nagata, Kenji Browse this author
	Okada, Masato Browse this author
Issue Date:	24-Jul-2014
Publisher:	American Physical Society
Journal Title:	Physical Review E
Volume:	90
Issue:	1
Start Page:	012126
Publisher DOI:	10.1103/PhysRevE.90.012126
PMID:	25122270
Abstract:	We examine the average-case performance of a code-division multiple-access (CDMA) multiuser demodulator in which quantum fluctuations are utilized to demodulate the original message within the context of Bayesian inference. The quantum fluctuations are built into the system as a transverse field in the infinite-range Ising spin glass model. We evaluate the performance measurements by using statistical mechanics. We confirm that the CDMA multiuser modulator using quantum fluctuations achieve roughly the same performance as the conventional CDMA multiuser modulator through thermal fluctuations on average. We also find that the relationship between the quality of the original information retrieval and the amplitude of the transverse field is somehow a "universal feature" in typical probabilistic information processing, viz., in image restoration, error-correcting codes, and CDMA multiuser demodulation.
Rights:	©2014 American Physical Society
Type:	article
URI:	http://hdl.handle.net/2115/57442
Appears in Collections:	情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 井上純一

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