NDLI: Performance of the uplink multicarrier CDMA systems for WPAN indoor applications on MMW band

Content Provider	IEEE Xplore Digital Library
Author	Le Liu Ming Lei Ping Zhang Hamaguchi, K. Wakana, H.
Copyright Year	2004
Description	Author affiliation: Beijing Univ. of Posts & Telecommun., China (Le Liu; Ming Lei; Ping Zhang)
Abstract	This paper compares the soft-decision decoding based BER performance of two multicarrier CDMA schemes: MC-CMDA and MC-DS-CDMA assuming a 6.4 GHz bandwidth based on 62.5 GHz carrier frequency in order to achieve an optimum wireless access scheme for WPAN (wireless personal area network) applications. In an indoor millimeter wave propagation environment, although the channel is time-invariant for a long time, the requirement of very high data rate makes the system design a hard mission and the severe MAI caused by asynchronous users in the uplink, especially with very low spreading factor, makes it harder. Computer simulation results show that, in the reverse link, MC-CDMA achieves much better performance than MC-DS-CDMA for single user scenario because of the severe ISI in the latter system. However, as the number of users increases, MC-CDMA, which is spread in the frequency domain, cannot hold its BER superiority to that of MC-DS-CDMA, spread in the time domain, since the larger number of subcarriers in MC-CDMA system, requested to reach 1 Gbps data rate, would experience frequency selective degradation in the frequency domain, which results in the loss of orthogonality among subcarriers. Moreover, the low spreading factor would cause more severe MAI.
Starting Page	2027
Ending Page	2031
File Size	381768
Page Count	5
File Format	PDF
ISBN	0780382552
ISSN	15502252
DOI	10.1109/VETECS.2004.1390630
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-05-17
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multiaccess communication Multicarrier code division multiple access Bit error rate Frequency domain analysis Decoding Bandwidth Wireless personal area networks Millimeter wave propagation Computer simulation Intersymbol interference
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Electrical and Electronic Engineering Computer Science Applications

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