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Crest Factors of 16-QAM Modulated Multicode MC-CDMA Signals Employing Complementary Sequences  

Choi Byoung-Jo (인천대학교 멀티미디어시스템공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.31, no.9C, 2006 , pp. 817-824 More about this Journal
Abstract
The crest factor properties of 16-QAM modulated one- and two-code assisted multi-carrier code-division multiple-access (MC-CDMA) signals employing complementary pair as spreading sequences are characterized. It is shown that a set of relationship between the two 16-QAM symbols entirely characterize the power envelope waveforms of the signals. There exists 60 different sets of relationship, which results in 16 different crest factors as a result of various equivalent transforms on the corresponding message symbols. It is also shown that the individual crest factor corresponding to each message combination is always bounded by 3dB.
Keywords
Crest Factor; PMEPR; MC-CDMA; QAM; Complementary Sequence;
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