Analytical Correlation of Spreading Sequences for Nonlinear OQPSK-Type Modulations

Rui Miguel Henriques Dias Morgado Dinis; DEE Group Author

doi:10.1109/VETECS.2011.5956206

Analytical Correlation of Spreading Sequences for Nonlinear OQPSK-Type Modulations

Rui Miguel Henriques Dias Morgado Dinis, DEE Group Author

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The correlation properties of some spreading sequences when applied to a system using nonlinear OQPSK-type signals is the main focus of this paper. These signals include, as special cases, CPM schemes (Continuous-Phase Modulation), which 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 both the autocorrelation and the cross-correlation of those signals. The resulting expressions are then applied to Gold Codes, Maximum-Length Sequences (MLS) and TCH (Tomlinson, Cercas, Hughes) sequences. It is shown that TCH sequences have better autocorrelation and cross-correlation properties than the other spreading sequences.

Original language	Unknown
Title of host publication	IEEE Vehicular Technology Conference
Pages	1 - 5
DOIs	https://doi.org/10.1109/VETECS.2011.5956206
Publication status	Published - 1 Jan 2011
Event	73rd IEEE Vehicular Technology Conference (VTC Spring) - Duration: 1 Jan 2011 → …

Conference

Conference	73rd IEEE Vehicular Technology Conference (VTC Spring)
Period	1/01/11 → …

Cite this

Dinis, R. M. H. D. M., & DEE Group Author (2011). Analytical Correlation of Spreading Sequences for Nonlinear OQPSK-Type Modulations. In IEEE Vehicular Technology Conference (pp. 1 - 5) https://doi.org/10.1109/VETECS.2011.5956206

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abstract = "The correlation properties of some spreading sequences when applied to a system using nonlinear OQPSK-type signals is the main focus of this paper. These signals include, as special cases, CPM schemes (Continuous-Phase Modulation), which 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 both the autocorrelation and the cross-correlation of those signals. The resulting expressions are then applied to Gold Codes, Maximum-Length Sequences (MLS) and TCH (Tomlinson, Cercas, Hughes) sequences. It is shown that TCH sequences have better autocorrelation and cross-correlation properties than the other spreading sequences.",

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AB - The correlation properties of some spreading sequences when applied to a system using nonlinear OQPSK-type signals is the main focus of this paper. These signals include, as special cases, CPM schemes (Continuous-Phase Modulation), which 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 both the autocorrelation and the cross-correlation of those signals. The resulting expressions are then applied to Gold Codes, Maximum-Length Sequences (MLS) and TCH (Tomlinson, Cercas, Hughes) sequences. It is shown that TCH sequences have better autocorrelation and cross-correlation properties than the other spreading sequences.

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Access to Document

10.1109/VETECS.2011.5956206