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2006•Unpublished venueRequires access

Orthogonal spreading with transmit diversity for multicarrier systems

Ronald Raulefs, Armin Dammann

Open publisher page 1 citations

Abstract

In this paper, we present a synchronous code division multiple (CDM) scheme that uses orthogonal frequency division multiple access (OFDMA) to separate different users. The CDM component multiplies each data symbol with a different phase shift. This results in unique chips, which represent a new alphabet. The potential of this alphabet is shown by EXIT-charts. Therefore, the receiver can choose between an improved interference cancellation scheme as well as an iterative decoder. Latter does not rely on all chips of a spread sequence and increases the potential granularity of the CDM scheme.

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What this paper is about

In this paper, we present a synchronous code division multiple (CDM) scheme that uses orthogonal frequency division multiple access (OFDMA) to separate different users. The CDM component multiplies each data symbol with a different phase shift. This results in unique chips, which represent a new alphabet. The potential of this alphabet is shown by EXIT-charts. Therefore, the receiver can choose between an improved interference cancellation scheme as well as an iterative decoder. Latter does not rely on all chips of a spread sequence and increases the potential granularity of the CDM scheme.

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Available abstract

In this paper, we present a synchronous code division multiple (CDM) scheme that uses orthogonal frequency division multiple access (OFDMA) to separate different users. The CDM component multiplies each data symbol with a different phase shift. This results in unique chips, which represent a new alphabet. The potential of this alphabet is shown by EXIT-charts. Therefore, the receiver can choose between an improved interference cancellation scheme as well as an iterative decoder. Latter does not rely on all chips of a spread sequence and increases the potential granularity of the CDM scheme.

Key concepts: Transmit diversity, Computer science, Diversity (politics), Diversity scheme, Telecommunications, Orthogonal frequency-division multiplexing, Electronic engineering, Computer network

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