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Optimal design of perfect DFT sequences
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Orientador(es)
Resumo(s)
In this paper, we propose a novel scheme to construct a large set with N(N + 1) perfect sequences of length N, derived from an Inverse Discrete Fourier Transform (IDFT) of Chu
and maximum-length sequences. This optimum set of perfect periodic autocorrelation sequences has a maximum absolute value of periodic cross-correlation strictly lower than
N and close to the well known lower bound SQRT(N). Moreover, we present a method to transform these perfect sequences into orthogonal sequences. A similar method is also
proposed to obtain optimum bipolar codes derived from an alternative set of N2 perfect sequences.
In the design of perfect sequences, the difficulty is to achieve both low cross-correlation and low peak-to-average power ratio (PAPR). Many of the proposed perfect DFT sequences
should have low PAPR and thus can be applied in an OFDM–CDMA (Orthogonal Frequency-Division Multiplexing–Code Division Multiple Access) communication system or in a
simple CDMA communication system. Alternatively, the proposed perfect DFT sequences may be useful for pre-coded mapping in OFDM communication systems or for the design
of radar waveform diversity sets.
Descrição
Palavras-chave
CDMA GDFT OFDM Perfect sequences
Contexto Educativo
Citação
João S. Pereira, Henrique J.A. da Silva, Optimal design of perfect DFT sequences, Physical Communication, Volume 7, 2013, Pages 92-104, ISSN 1874-4907, https://doi.org/10.1016/j.phycom.2012.10.001.
Editora
Elsevier