Title :
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
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;
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
DOI :
10.1109/ISWCS.2007.4392391
