DocumentCode :
2425007
Title :
Worst Case and Expected Peak-to-Average Power Ratio for Orthonormal Systems
Author :
Farrell, Brendan ; Boche, Holger
Author_Institution :
Lehrstuhl fur Theor. Informationstechnik, Tech. Univ. Munchen, Munich, Germany
fYear :
2011
fDate :
5-9 June 2011
Firstpage :
1
Lastpage :
5
Abstract :
We present several results that show, according to several criteria, that the large peaks that occur in OFDM are common to all orthonormal systems that are uniformly bounded. In particular, worst case peak-to-average values are always at least the square-root of the number of signals, and the expected peak value of a signal always increases logarithmically with the number of signals. The same growth also occurs for single-user signals with the appropriate normalization. Further, we investigate peak-to-average power properties of the prolate spheroidal wave functions and the Walsh functions, which are used in DS-CDMA.
Keywords :
OFDM modulation; Walsh functions; code division multiple access; spread spectrum communication; DS-CDMA; OFDM systems; Walsh functions; orthonormal systems; peak-to-average power ratio; prolate spheroidal wave functions; single-user signals; worst case peak-to-average values; Bandwidth; IEEE Communications Society; Multiaccess communication; Peak to average power ratio; Random variables; Wave functions;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communications (ICC), 2011 IEEE International Conference on
Conference_Location :
Kyoto
ISSN :
1550-3607
Print_ISBN :
978-1-61284-232-5
Electronic_ISBN :
1550-3607
Type :
conf
DOI :
10.1109/icc.2011.5963448
Filename :
5963448
Link To Document :
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