Statistical Mechanical Analysis of CDMA Multiuser Detectors | Zendy

Tatsuya Uezu | Zendy; Mika Yoshida | Zendy; Toshiyuki Tanaka | Zendy; Masato Okada | Zendy

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Statistical Mechanical Analysis of CDMA Multiuser Detectors

Author(s) -

Tatsuya Uezu,

Mika Yoshida,

Toshiyuki Tanaka,

Masato Okada

Publication year - 2005

Publication title -

progress of theoretical physics supplement

Language(s) - English

Resource type - Journals

ISSN - 0375-9687

DOI - 10.1143/ptps.157.254

Subject(s) - replica , detector , code division multiple access , ansatz , physics , entropy (arrow of time) , statistical physics , mathematics , algorithm , computer science , quantum mechanics , optics , telecommunications , art , visual arts

A class of code-division multiple-access (CDMA) multiuser detectors in the large-system limit has been investigated by Tanaka by means of statistical mechanics, i.e. the replica method. He evaluated analytically the bit-error rate, the multiuser efficiency, etc. of Marginal-Posterior-Mode (MPM) detectors under the replica symmetry (RS) ansatz. In this paper, to investigate the breaking of the replica symmetry, we study the de Almeida-Thouless (AT) stability, the entropy, and the free energy of the RS solutions for MPM detectors including individually optimum (IO) ones.

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