CDMA equalizer quantization

Author

Sexton, T.A. ; Heikkila, M.J. ; Lilleberg, J. ; Majonen, K. ; Rounioja, K. ; Ivanov, P.A.

Author_Institution

NOKIA, Irving, TX, USA

Volume

4

fYear

2004

fDate

29 Nov.-3 Dec. 2004

Firstpage

2318

Abstract

Our topic is channel equalizer quantization for a cellular handset. We answer questions regarding quantization of variables internal to the equalizer using some estimated bounds and simulation. This includes the catastrophic event of breakdown due to a roundoff-induced singularity in Cholesky factorization. Realistic modeling of the received waveform and channel estimation includes quantization effects, as well as quantization of the taps used in the operation of the equalizer. Modem results are given in terms of frame error rate and throughput for various quantization scenarios.

Keywords

cellular radio; channel estimation; code division multiple access; equalisers; error statistics; mobile handsets; modems; quantisation (signal); CDMA equalizer quantization; Cholesky factorization; bounds estimation; cellular handset; channel equalizer quantization; channel estimation; frame error rate; modem; roundoff-induced singularity; throughput; Downlink; Electric breakdown; Equalizers; Error analysis; Filters; Intersymbol interference; Multiaccess communication; Quantization; Telephone sets; Throughput;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2004. GLOBECOM '04. IEEE

Print_ISBN

0-7803-8794-5

Type

conf

DOI

10.1109/GLOCOM.2004.1378422

Filename

1378422