Paper Info
Title
Localized or Interleaved? A Tradeoff between Diversity and CFO Interference in Multipath Channels
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.
Year
DOI
Venue
2011
10.1109/TWC.2011.071411.102321
IEEE Transactions on Wireless Communications
Keywords
Field
DocType
Long Term Evolution,OFDM modulation,channel allocation,diversity reception,frequency division multiple access,intercarrier interference,multipath channels,multiuser channels,CFO interference,OFDMA system,SC-FDMA system,carrier frequency offset,channel allocation,diversity gain,interleaved distributed schemes,multipath channels,multiuser interference,semiinterleaved scheme,subcarrier allocation,subcarriers,uplink LTE systems,OFDMA,SC-FDMA,carrier frequency offset,diversity gain
Diversity gain,Diversity scheme,Carrier frequency offset,Computer network,Interference (wave propagation),Frequency-division multiple access,Channel allocation schemes,Mathematics,Orthogonal frequency-division multiplexing,Telecommunications link
Journal
Volume
Issue
ISSN
10
9
1536-1276
Citations 
PageRank 
References 
21
1.11
10
Authors
3
Name
Order
Citations
PageRank
Shenghui Song113111.77
Guoliang Chen230546.48
K. B. Letaief311078879.10