On pilot-assisted MAP detection in frequency-flat Rayleigh fading channels

Author

Sgraja, Christian ; Egle, Jochem ; Lindner, Jurgen

Author_Institution

Dept. of Inf. Technol., Ulm Univ., Germany

Volume

2

fYear

2003

fDate

20-20 March 2003

Firstpage

930

Abstract

Pilot symbol assisted modulation (PSAM) eases the task of estimating the channel gain and phase in frequency-flat Rayleigh fading. Inaccurate channel estimates may lead to an increased error probability in a subsequent data detection stage. For PSAM and flat Rayleigh fading, the effects of channel estimation errors on the error probability have been analyzed in A. Aghamohammadi and H. Meyr [Nov. 1990]. We pursue the analysis given in A. Aghamohammadi and H. Meyr [Nov. 1990] and derive the maximum a-posteriori (MAP) detector which minimizes the symbol error probability by processing the data and pilot receive symbol(s) simultaneously. This detector is compared to the conventional 2 step receiver which performs channel estimation followed by data detection. Moreover, a basic approach to calculate the symbol error probability is given and we study and illustrate the decision regions of the two detectors.

Keywords

Rayleigh channels; channel estimation; error statistics; maximum likelihood detection; modulation; PSAM; channel estimates; channel gain; channel phase; data detection; error probability; frequency flat Rayleigh fading channels; pilot assisted MAP detection; pilot symbol assisted modulation; Channel estimation; Detectors; Error probability; Fading; Frequency estimation; Maximum a posteriori estimation; Notice of Violation; Phase estimation; Phase modulation; Rayleigh channels;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking, 2003. WCNC 2003. 2003 IEEE

Conference_Location

New Orleans, LA, USA

ISSN

1525-3511

Print_ISBN

0-7803-7700-1

Type

conf

DOI

10.1109/WCNC.2003.1200496

Filename

1200496