Müller R (2004)
Publication Status: Published
Publication Type: Conference contribution, Conference Contribution
Publication year: 2004
Pages Range: 88-92
Event location: London
URI: https://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=27644523673&origin=inward
We propose an iterative receiver for a multi-carrier (MC) code division multiple access (CDMA) system in the uplink for users moving at vehicular speed. MC-CDMA is based on orthogonal frequency division multiplexing (OFDM), thus time-variant channel estimation can be performed for every subcarrier independently. The variation of a subcarrier over the duration of a data block is upper bounded by a maximum Doppler bandwidth which is determined by the maximum velocity of the users and the carrier frequency. We exploit results from the theory of time-concentrated and bandlimited sequences and apply a Slepian basis expansion for time-variant subcarrier estimation. The Slepian basis functions are determined by two parameters; the block length and the maximum Doppler bandwidth. This approach enables time-variant channel estimation without complete knowledge of the second-order statistics of the fading process. The performance of the iterative receiver is validated for a wide range of velocities by simulations.
APA:
Müller, R. (2004). Iterative multi-user decoding with time-variant channel estimation for MC-CDMA. In Proceedings of the Fith IEE International Conference on 3G Mobile Communication Technologies 2004 - The Premier Technical Conference for 3G and Beyond (pp. 88-92). London.
MLA:
Müller, Ralf. "Iterative multi-user decoding with time-variant channel estimation for MC-CDMA." Proceedings of the Fith IEE International Conference on 3G Mobile Communication Technologies 2004 - The Premier Technical Conference for 3G and Beyond, London 2004. 88-92.
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