Downlink DSTBC-WCDMA in a Fast Time-Dispersive Channel

Author

Umali, Edwin M. ; Yamao, Yasushi

Author_Institution

Adv. Wireless Commun. Res. Center, Univ. of Electro-Commun., Tokyo, Japan

fYear

2007

fDate

17-19 Oct. 2007

Firstpage

503

Lastpage

507

Abstract

In this paper, the differential space-time block code (DSTBC) modulation is applied to the downlink transmission of the WCDMA system to enhance system performance in fast- varying time-dispersive channels. The effect of scrambling operation is also considered to improve correlation between users´ signal. Among the receivers presented here, the differential space-time block code deterministic de-prefix combined (D-Det-DP-C) receiver shows the best performance. Since DSTBC-WCDMA is a differential modulation scheme, the best performance is obtained under the condition that the receiver has complete information regarding the interferers to minimize the effect of multipath and multi-user interference.

Keywords

block codes; broadband networks; code division multiple access; dispersive channels; interference (signal); modulation; space-time codes; time-varying channels; deterministic de-prefix combined receiver; differential modulation scheme; differential space-time block code; downlink DSTBC-WCDMA; downlink transmission; fast time-dispersive channel; multipath interference; multiuser interference; scrambling operation; Block codes; Channel estimation; Downlink; Interference; Modulation coding; Multiaccess communication; RAKE receivers; Receiving antennas; System performance; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communication Systems, 2007. ISWCS 2007. 4th International Symposium on

Conference_Location

Trondheim

Print_ISBN

978-1-4244-0978-5

Electronic_ISBN

978-1-4244-0979-2

Type

conf

DOI

10.1109/ISWCS.2007.4392391

Filename

4392391