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

Authors:

M. Feuersänger, V. Kühn, K.-D. Kammeyer, F. Hasenknopf

Abstract:

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.

Document type:

Conference Paper

Publication:

Oberpfaffenhofen, Germany, 17. - 19. September 2003

Conference:

4th International Workshop on Multi-Carrier Spread-Spectrum (MCSS 03)

Index:

215

Files:

Paper