NDLI: Multiband and multicarrier wavelet packet multiplexing for UWB transmissions

Content Provider	IEEE Xplore Digital Library
Author	Harada, H. Harada, H. Hernandez, M. Hernandez, M. Kohno, R. Kohno, R.
Copyright Year	2008
Description	Author affiliation: Grad. Sch. of Electr. Eng., Yokohama Nat. Univ., Yokohama (Harada, H.; Hernandez, M.; Kohno, R.) \|\| New Generation Wireless Commun. Res. Center, Nat. Inst. of Inf. & Commun. Technol., Yokosuka (Harada, H.; Hernandez, M.; Kohno, R.)
Abstract	We propose a novel multi-channel modulation scheme for UWB transmissions based on the discrete wavelet packet transform (DWPT) and DWT combined with spread spectrum and multiband approaches (as analogous to multicarrier CDMA and multiband OFDM). Thus, two possible structures are proposed for UWB transmissions. Namely, multiband DWT multiplexing and DWT-CDMA multiplexing. Indeed, the proposed techniques divide UWB channels into a set of parallel channels. Exploiting the properties of wavelets in time and frequency, a set of multi-channel basis functions can be formed such that the corresponding channel-output functions remain nearly orthogonal for any UWB channel. Multiple access can be introduced in the form of time-frequency hopping codes (similar to multiband OFDM) or by introducing spreading codes (similar to multicarrier CDMA). The proposals are compared to multiband OFDM and multicarrier CDMA in terms of BER performance.
Starting Page	39
Ending Page	42
File Size	125136
Page Count	4
File Format	PDF
ISBN	9781424422166
DOI	10.1109/ICUWB.2008.4653411
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-09-10
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multiplexing UWB transmission OFDM Bit error rate multi-channel modulation Time frequency analysis Wavelet packets Discrete wavelet transforms Multiaccess communication
Content Type	Text
Resource Type	Article

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