Utilize este identificador para referenciar este registo: http://hdl.handle.net/10071/28174
Autoria: Dinis, R.
Souto, N.
Silva, J.
Kumar, A.
Correia, A.
Data: 2007
Título próprio: Joint detection and channel estimation for OFDM signals with implicit pilots
Título e volume do livro: 2007 16th IST Mobile and Wireless Communications Summit
Título do evento: 2007 16th IST Mobile and Wireless Communications Summit
Referência bibliográfica: Dinis, R., Souto, N., Silva, J., Kumar, A., & Correia, A. (2007). Joint detection and channel estimation for OFDM signals with implicit pilots. In 2007 16th IST Mobile and Wireless Communications Summit, 4299038. IEEE. https://doi.org/10.1109/ISTMWC.2007.4299038
ISSN: 2167-1753
ISBN: 1-4244-1662-0
DOI (Digital Object Identifier): 10.1109/ISTMWC.2007.4299038
Palavras-chave: OFDM
Channel estimation
Implicit pilots
Iterative receivers
Resumo: Accurate channel estimation is mandatory for the performance of OFDM modulations (orthogonal frequency division multiplexing). For this purpose, pilot symbols and/or training sequences are usually multiplexed with data symbols. To avoid the spectral degradation associated to multiplexed pilots, the use of implicit pilots (i.e., pilots superimposed to data) was recently proposed. However, the interference levels between data and pilots might be very high, leading to performance degradation. In this paper we consider OFDM schemes where the channel estimation is based on implicit pilots. To overcome the difficulties inherent to the interference levels between pilots and data, we propose an iterative receiver with joint detection and channel estimation. Our performance results show that we can achieve performances close to the ones with perfect channel estimation, even when low-power pilots or sort frames are employed.
Arbitragem científica: yes
Acesso: Acesso Aberto
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