Comparison o Pilot Multiplexing Schemes for ML Channel Estimation in Coded OFDM-CDMA

Autoren: M. Feuersänger, V. Kühn, K.-D. Kammeyer, F. Hasenknopf
Kurzfassung: As bandwidth is becoming precious, spectral efficiency is nowadays one of the key parameters of mobile radio communications. To reach high spectral efficiency in Code Division Multiple Access systems, combating multi-user interference is inevitable. Especially in an uplink scenario this can be done by applying multi-user detection. This paper compares two multiplexing schemes for pilot data in a system with combined maximum likelihood channel estimation (MLCE) and successive interference cancellation (SIC). It is shown that even though preceding pilots deliver a better initial channel estimate a scheme with IQ-mapped pilots leads to better performance when using a combined MLCE-SIC receiver.
Dokumenttyp: Konferenzbeitrag
Veröffentlichung: Oberpfaffenhofen, Germany, 17. - 19. September 2003
Konferenz: 4th International Workshop on Multi-Carrier Spread-Spectrum (MCSS 03)
Index: 215
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