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IB-DFE receiver techniques for CP-assisted block transmission within DS-CDMA and MC-CDMA systems
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Autores
Orientador(es)
Resumo(s)
MC-CDMA (MultiCarrier Code Division
Multiple Access), currently regarded as a promissing
multiple access scheme for broadband communications, is
known to combine the advantages of an OFDM-based (Orthogonal
Frequency Division Multiplexing), CP-assisted
(Cyclic Prefix) block transmission with those of CDMA
systems. Recently, it was recognised that DS-CDMA (Direct
Sequence) implementations can also take advantage
of the beneficts of the CP-assisted block transmission
approach, therefore enabling an efficient use of FFT-based
(Fast Fourier Transform), chip level FDE (Frequency-
Domain Equalisation) techniques.
In this paper we consider the use of IB-DFE (Iterative
Block Decision Feedback Equalisation) FDE techniques
within both CP-assisted MC-CDMA systems with
frequency-domain spreading and DS-CDMA systems. Our
simulation results show that an IB-DFE receiver with
moderate complexity is suitable in both cases, with excellent
performances that can be close to the single-code
matched filter bound (especially for the CP-assisted DSCDMA
alternative), even with full code usage.
Descrição
Palavras-chave
Telecomunicações Comunicações sem fios Wireless MUD CDMA Igualização no domínio da frequência 621.39
Contexto Educativo
Citação
Proc. ISCTA'05. - Ambleside, July 2005. - 5 p
Editora
Ambleside