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Title: Analytical computation of the correlation of spreading sequences for nonlinear OQPSK-type modulations
Authors: Afonso, D.
Cercas, F.
Dinis, R.
Rodrigues, R.
Luz, A.
Keywords: PN sequences
Nonlinear modulations
Correlation behavior
Issue Date: 2012
Publisher: Wiley-Blackwell
Abstract: In this paper we study the behavior and correlation properties of some spreading sequences when applied to a system using nonlinear offset quadrature phase-shift keying-type modulations. These signals, which include as special cases continuous-phase modulation schemes, can be designed to have very low envelope fluctuations or even a constant envelope, making them compatible with a very low-cost and power-efficient grossly nonlinear amplification. We use an analytical method to derive the correlation of those signals. The resulting expressions are then applied to maximum-length sequences, Kasami, and Tomlinson, Cercas, Hughes sequences. It is shown that Tomlinson, Cercas, Hughes sequences have better correlation properties than other spreading sequences.
Description: WOS:000310732500010 (Nº de Acesso Web of Science)
Peer reviewed: Sim
DOI: 10.1002/ett.2524
ISSN: 1124-318X
Appears in Collections:CTI-RI - Artigos em revistas científicas internacionais com arbitragem científica

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