DocumentCode
745568
Title
A bandwidth-power efficient modulation scheme based on quaternary quasi-orthogonal sequences
Author
Kim, Youhan ; Cheun, Kyungwhoon ; Yang, Kyeongcheol
Author_Institution
Div. of Electr. & Comput. Eng., Pohang Univ. of Sci. & Technol., South Korea
Volume
7
Issue
7
fYear
2003
fDate
7/1/2003 12:00:00 AM
Firstpage
293
Lastpage
295
Abstract
A novel modulation scheme suitable for noncoherent demodulation based on quaternary quasi-orthogonal sequences is proposed. Compared to orthogonal modulation, the controlled quasi-orthogonality between the sequences allows significantly increased bandwidth efficiency with little or no degradation in power efficiency. A hardware efficient demodulator structure using fast Walsh transforms is also presented.
Keywords
Walsh functions; demodulation; modulation; transforms; bandwidth-power efficient modulation; fast Walsh transforms; hardware efficient demodulator structure; noncoherent demodulation; quaternary quasi-orthogonal sequences; AWGN channels; Bandwidth; Channel capacity; Costs; Degradation; Demodulation; Frequency shift keying; Hardware; Microwave integrated circuits; Phase modulation;
fLanguage
English
Journal_Title
Communications Letters, IEEE
Publisher
ieee
ISSN
1089-7798
Type
jour
DOI
10.1109/LCOMM.2003.813821
Filename
1214050
Link To Document