A MUSIC-Based Algorithm for Blind User Identification in Multiuser DS-CDMA | Zendy

Afshin Haghighat | Zendy; M. Reza Soleymani | Zendy

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A MUSIC-Based Algorithm for Blind User Identification in Multiuser DS-CDMA

Author(s) -

Afshin Haghighat,

M. Reza Soleymani

Publication year - 2005

Publication title -

eurasip journal on advances in signal processing

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.317

H-Index - 88

eISSN - 1687-6180

pISSN - 1687-6172

DOI - 10.1155/asp.2005.649

Subject(s) - code division multiple access , subspace topology , computer science , linear subspace , signal (programming language) , ambiguity , algorithm , multiuser detection , signal subspace , identification (biology) , interference (communication) , code (set theory) , scheme (mathematics) , transformation (genetics) , process (computing) , speech recognition , theoretical computer science , mathematics , artificial intelligence , telecommunications , mathematical analysis , channel (broadcasting) , biochemistry , botany , geometry , noise (video) , set (abstract data type) , chemistry , gene , image (mathematics) , biology , programming language , operating system

A blind scheme based on multiple-signal classification (MUSIC) algorithm for user identification in a synchronous multiuser code-division multiple-access (CDMA) system is suggested. The scheme is blind in the sense that it does not require prior knowledge of the spreading codes. Spreading codes and users' power are acquired by the scheme. Eigenvalue decomposition (EVD) is performed on the received signal, and then all the valid possible signature sequences are projected onto the subspaces. However, as a result of this process, some false solutions are also produced and the ambiguity seems unresolvable. Our approach is to apply a transformation derived from the results of the subspace decomposition on the received signal and then to inspect their statistics. It is shown that the second-order statistics of the transformed signal provides a reliable means for removing the false solutions

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