NDLI: Localized or Interleaved? A Tradeoff between Diversity and CFO Interference in Multipath Channels

Content Provider	IEEE Xplore Digital Library
Author	Song, S.H. Chen, G.L. Letaief, K.B.
Copyright Year	2002
Abstract	Carrier frequency offset (CFO) damages the orthogonality between sub-carriers and thus causes multiuser interference in uplink OFDMA/SC-FDMA systems. For a given CFO, such multiuser interference is mainly dictated by channel (sub-carrier) allocation, which also specifies the diversity gain of one user over multi-path channels. In particular, the positions of one user's sub-channels will determine its diversity gain, while the distances between sub-channels of the concerned user and those of others will govern the CFO interference. Two popular channel allocation methods are the localized and interleaved (distributed) schemes where the former has less CFO interference but the latter achieves more diversity gain. In this paper, we will consider the channel allocation scheme for uplink LTE systems by investigating the effects of channel allocation on both of the diversity gain and CFO interference. By combining these two effects, we will propose a semi-interleaved scheme, which achieves full diversity gain with minimum CFO interference.
Starting Page	2829
Ending Page	2834
Page Count	6
File Size	275929
File Format	PDF
ISSN	15361276
Volume Number	10
Issue Number	9
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Interference Diversity methods Channel allocation Signal to noise ratio Frequency division multiaccess Frequency diversity Multipath channels diversity gain OFDMA SC-FDMA carrier frequency offset
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Electrical and Electronic Engineering Computer Science Applications

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