Eavesdropping in the synchronous CDMA channel: An EM-based approach

Yingwei Yao; H. Vincent Poor

doi:10.1109/78.934146

Eavesdropping in the synchronous CDMA channel: An EM-based approach

Yingwei Yao, H. Vincent Poor

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

The problem of blind detection in a synchronous code division multiple access (CDMA) system when there is no knowledge of the users' spreading sequences is considered. An expectation maximization (EM)-based algorithm that exploits the finite alphabet (FA) property of the digital communications source is proposed. Simulations indicate that this approach, which makes use of knowledge of the subspace spanned by the signaling multiplex, achieves the Cramér-Rao lower bound (CRB). The issues of subspace estimation and timing acquisition are also considered.

Original language	English (US)
Pages (from-to)	1748-1756
Number of pages	9
Journal	IEEE Transactions on Signal Processing
Volume	49
Issue number	8
DOIs	https://doi.org/10.1109/78.934146
State	Published - Aug 2001

All Science Journal Classification (ASJC) codes

Signal Processing
Electrical and Electronic Engineering

Keywords

CDMA
Code-free demodulation
EM-algorithm

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10.1109/78.934146

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title = "Eavesdropping in the synchronous CDMA channel: An EM-based approach",

abstract = "The problem of blind detection in a synchronous code division multiple access (CDMA) system when there is no knowledge of the users' spreading sequences is considered. An expectation maximization (EM)-based algorithm that exploits the finite alphabet (FA) property of the digital communications source is proposed. Simulations indicate that this approach, which makes use of knowledge of the subspace spanned by the signaling multiplex, achieves the Cram{\'e}r-Rao lower bound (CRB). The issues of subspace estimation and timing acquisition are also considered.",

keywords = "CDMA, Code-free demodulation, EM-algorithm",

author = "Yingwei Yao and Poor, {H. Vincent}",

note = "Funding Information: Manuscript received April 4, 2000; revised February 14, 2001. This work was supported by the Office of Naval Research under Grant N00014-00-1-0141. The associate editor coordinating the review of this paper and approving it for publication was Dr. Alex C. Cot.",

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AU - Yao, Yingwei

AU - Poor, H. Vincent

N1 - Funding Information: Manuscript received April 4, 2000; revised February 14, 2001. This work was supported by the Office of Naval Research under Grant N00014-00-1-0141. The associate editor coordinating the review of this paper and approving it for publication was Dr. Alex C. Cot.

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N2 - The problem of blind detection in a synchronous code division multiple access (CDMA) system when there is no knowledge of the users' spreading sequences is considered. An expectation maximization (EM)-based algorithm that exploits the finite alphabet (FA) property of the digital communications source is proposed. Simulations indicate that this approach, which makes use of knowledge of the subspace spanned by the signaling multiplex, achieves the Cramér-Rao lower bound (CRB). The issues of subspace estimation and timing acquisition are also considered.

AB - The problem of blind detection in a synchronous code division multiple access (CDMA) system when there is no knowledge of the users' spreading sequences is considered. An expectation maximization (EM)-based algorithm that exploits the finite alphabet (FA) property of the digital communications source is proposed. Simulations indicate that this approach, which makes use of knowledge of the subspace spanned by the signaling multiplex, achieves the Cramér-Rao lower bound (CRB). The issues of subspace estimation and timing acquisition are also considered.

KW - CDMA

KW - Code-free demodulation

KW - EM-algorithm

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JF - IEEE Transactions on Signal Processing

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ER -

Eavesdropping in the synchronous CDMA channel: An EM-based approach

Abstract

All Science Journal Classification (ASJC) codes

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