Update Rate of Channel Estimation for UMTS-HSDPA in Time-Varying Channels

Author

Freudenthaler, Klemens ; Springer, Andreas ; Wehinger, Joachim ; Mecklenbrauker, Christoph F.

Author_Institution

Johannes-Kepler Univ. Linz

Volume

4

fYear

2006

fDate

7-10 May 2006

Firstpage

1777

Lastpage

1781

Abstract

We investigate the update rate for channel estimation in time-varying channels for UMTS-HSDPA. Our channel estimator is based on correlation of the received chip stream and the known pilot stream. This results in an averaging of the estimated channel over a block. First, we investigate the influence of the update rate by averaging over the perfectly known channel at the receiver. This corresponds to the upper bound for block averaging. Second, we examine the throughput by averaging over correlation based channel estimation. We find specific update rates for the ITU-channel models PB3, VA30, and VA120 in combination with RAKE reception or LMMSE equalization for 16-QAM symbol constellation

Keywords

3G mobile communication; access protocols; channel estimation; least mean squares methods; packet radio networks; quadrature amplitude modulation; time-varying channels; 16-QAM symbol constellation; ITU-channel models PB3; LMMSE equalization; RAKE reception; UMTS-HSDPA; VA120; VA30; block averaging; channel estimation; chip stream; pilot stream; time-varying channels; update rate; 3G mobile communication; Channel estimation; Downlink; Equalizers; Modulation coding; Multiaccess communication; RAKE receivers; Throughput; Time-varying channels; Upper bound;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2006. VTC 2006-Spring. IEEE 63rd

Conference_Location

Melbourne, Vic.

ISSN

1550-2252

Print_ISBN

0-7803-9391-0

Electronic_ISBN

1550-2252

Type

conf

DOI

10.1109/VETECS.2006.1683152

Filename

1683152