Paper Info
Title
Low correlation interleaved QAM sequences
Abstract
Three low correlation interleaved QAM sequence families are presented here. In a CDMA setting, these sequences have the ability to transport a larger amount of data as well as enable variable-rate signaling on the reverse link. These constructions have the lowest known value of maximum correlation magnitude of any sequence family with the same alphabet. Interleaved canonical family ICQ has period N, normalized maximum correlation parameter thetas macrmax bounded above by lsim a radic N, where a ranges from 1.41 in the 16- QAM case to 2.12 for large M. Each user is enabled to transfer 2m bits of data per period of the spreading sequence. Interleaved selected family ISQ has a lower value of thetas macrmax but permits only (m+ 1)-bit data modulation. The thetas macrmax of sequences in this family is bounded above by lsim a radicN, where a ranges from 1.89 in the case of 64-QAM modulation to 1.99 for large M. The third family is over a quadrature-PAM (Q-PAM) subset of size 2M of the M2-QAM constellation. Interleaved family IP has a lower value of thetas macrmax in comparison with family ISQ, while still permitting (m + 1)-bit data modulation. The thetas macrmax of sequences in this family is bounded above by lsim a radicN, where a ranges from 1.39 in the 16-ary Q-PAM case to 1.72 for large M.
Year
DOI
Venue
2008
10.1109/ISIT.2008.4595326
ISIT
Keywords
Field
DocType
maximum correlation magnitude,cdma,quadrature-pam,data modulation,low correlation interleaved qam sequences,interleaved canonical family,pulse amplitude modulation,variable-rate signaling,code division multiple access,quadrature amplitude modulation,correlation methods,binary phase shift keying,modulation,automation,variable rate,correlation,euclidean distance,computer science,constellation diagram
Discrete mathematics,Combinatorics,Quadrature amplitude modulation,Normalization (statistics),QAM,Bounded set,Euclidean distance,Modulation,Constellation diagram,Pulse-amplitude modulation,Mathematics
Conference
ISBN
Citations 
PageRank 
978-1-4244-2257-9
2
0.40
References 
Authors
11
3
Name
Order
Citations
PageRank
Gagan Garg1152.41
P. Vijay Kumar21708158.95
C. E. Veni Madhavan336682.05