Title :
Forward link capacity of coherent DS-CDMA and MC-CDMA broadband packet wireless access in a multi-cell environment
Author :
Abeta, Sadayuki ; Atarashi, Hiroyulu ; Sawahashi, Mamoru
Author_Institution :
Wireless Res. Lab., NTT DoCoMo Inc., Yokosuka, Japan
Abstract :
This paper investigates wireless access schemes, in the forward link that are suitable for wireless broadband packet transmission in a multi-cell environment. The single-carrier (SC)/DS-CDMA, multi-carrier (MC)/DS-CDMA, and MC-CDMA schemes are compared in terms of packet error rate (PER) performance taking into account the impact of other-cell interference assuming the use of cell-site diversity. The results show that, while SC/DS-CDMA (64 Mcps) and MC/DS-CDMA (number of sub-carriers 4, 16 Mcps per sub-carrier) cannot attain the average PER=10-2 for more than two users, MC-CDMA (number of sub-carriers=512, 156 ksps per sub-carrier) achieves much better performance and realizes simultaneous transmission of approximately 10 users with antenna diversity reception, when the total bandwidth is 80 MHz and the information bit rate per user is 2 Mbps
Keywords :
cellular radio; channel capacity; code division multiple access; diversity reception; error statistics; multiuser channels; packet radio networks; radio access networks; radio links; spread spectrum communication; 2 Mbit/s; 80 MHz; MC-CDMA broadband packet wireless access; PER performance; antenna diversity reception; bandwidth; cell-site diversity; coherent DS-CDMA broadband packet wireless access; forward link; forward link capacity; information bit rate per user; multi-carrier DS-CDMA; multi-cell environment; other-cell interference; packet error rate; performance; single-carrier DS-CDMA; sub-carriers; wireless broadband packet transmission; Bandwidth; Bit rate; Channel estimation; Interference; Multiaccess communication; Multicarrier code division multiple access; Signal resolution; Timing; Web and internet services; Wideband;
Conference_Titel :
Vehicular Technology Conference, 2000. IEEE-VTS Fall VTC 2000. 52nd
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-6507-0
DOI :
10.1109/VETECF.2000.883259
