Chirp-based multicarrier modulation

Ahmed Solyman; Stephan Weiss; John Soraghan

Chirp-based multicarrier modulation

Ahmed Solyman, Stephan Weiss, John Soraghan

Electronic And Electrical Engineering

Research output: Contribution to conference › Paper

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Abstract

In this paper we demonstrate that in doubly-dispersive environments, a multicarrier (MC) system based on a fractional Fourier transform (FrFT) can achieve a better concentration of power near the main diagonal of the equivalent channel matrix compared to standard orthogonal frequency division multiplexing (OFDM). The resulting inter-symbol and inter-carrier interference in such a chirp- based MC system can therefore be suppressed with a reduced complexity equaliser. Simulations show that compared to an equalised OFDM system, the equalised FrFT-MC approach can either significantly reduce complexity or enhance performance in a time-varying environment.

Original language	English
Pages	1-4
Number of pages	4
Publication status	Published - 17 Dec 2012
Event	9th IMA International Conference on Mathematics in Signal Processing - Birmingham, United Kingdom Duration: 17 Dec 2012 → 20 Dec 2012

Conference

Conference	9th IMA International Conference on Mathematics in Signal Processing
Country	United Kingdom
City	Birmingham
Period	17/12/12 → 20/12/12

Keywords

chirp-based
multicarrier modulation

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Ima12 3Accepted author manuscript, 110 KB

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abstract = "In this paper we demonstrate that in doubly-dispersive environments, a multicarrier (MC) system based on a fractional Fourier transform (FrFT) can achieve a better concentration of power near the main diagonal of the equivalent channel matrix compared to standard orthogonal frequency division multiplexing (OFDM). The resulting inter-symbol and inter-carrier interference in such a chirp- based MC system can therefore be suppressed with a reduced complexity equaliser. Simulations show that compared to an equalised OFDM system, the equalised FrFT-MC approach can either significantly reduce complexity or enhance performance in a time-varying environment.",

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AU - Weiss, Stephan

AU - Soraghan, John

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N2 - In this paper we demonstrate that in doubly-dispersive environments, a multicarrier (MC) system based on a fractional Fourier transform (FrFT) can achieve a better concentration of power near the main diagonal of the equivalent channel matrix compared to standard orthogonal frequency division multiplexing (OFDM). The resulting inter-symbol and inter-carrier interference in such a chirp- based MC system can therefore be suppressed with a reduced complexity equaliser. Simulations show that compared to an equalised OFDM system, the equalised FrFT-MC approach can either significantly reduce complexity or enhance performance in a time-varying environment.

AB - In this paper we demonstrate that in doubly-dispersive environments, a multicarrier (MC) system based on a fractional Fourier transform (FrFT) can achieve a better concentration of power near the main diagonal of the equivalent channel matrix compared to standard orthogonal frequency division multiplexing (OFDM). The resulting inter-symbol and inter-carrier interference in such a chirp- based MC system can therefore be suppressed with a reduced complexity equaliser. Simulations show that compared to an equalised OFDM system, the equalised FrFT-MC approach can either significantly reduce complexity or enhance performance in a time-varying environment.

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KW - multicarrier modulation

M3 - Paper

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EP - 4

T2 - 9th IMA International Conference on Mathematics in Signal Processing

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