Optical wavelet signals processing and multiplexing
EURASIP Journal on Applied Signal Processing
Performance of quasisynchronous scale time code division multiple access for AWGN channel
Computers and Electrical Engineering
MobiMedia '06 Proceedings of the 2nd international conference on Mobile multimedia communications
A cognitive radio system for home theatre "5+1 audio" surround applications
Proceedings of the 2009 International Conference on Wireless Communications and Mobile Computing: Connecting the World Wirelessly
Searching better wavelet packet tree for ISI and ICI reduction in WOFDM
WTS'09 Proceedings of the 2009 conference on Wireless Telecommunications Symposium
Performance limits of OWSS: A spectrally efficient WLAN system
Digital Signal Processing
Better wavelet packet tree based OFDM for multipath powerline channel
Computers and Electrical Engineering
An Investigation on the Sensitivity of Wavelet Packet Modulation to Time Synchronization Error
Wireless Personal Communications: An International Journal
WPSS communication system based on CRBF network equalizers
ICIC'06 Proceedings of the 2006 international conference on Intelligent Computing - Volume Part I
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Wavelet packet division multiplexing (WPDM) is a multiple signal transmission technique in which the message signals are waveform coded onto wavelet packet basis functions for transmission. The overlapping nature of such waveforms in time and frequency provides a capacity improvement over the commonly used frequency division multiplexing (FDM) and time division multiplexing (TDM) schemes while their orthogonality properties ensure that the overlapping message signals can be separated by a simple correlator receiver. The interference caused by timing offset in transmission is examined. A design procedure that exploits the inherent degrees of freedom in the WPDM structure to mitigate the effects of timing error is introduced, and a waveform that minimizes the energy of the timing error interference is designed. An expression for the probability of error due to the presence of Gaussian noise and timing error for the transmission of binary data is derived. The performance advantages of the designed waveform over standard wavelet packet basis functions are demonstrated by both analytical and simulation methods. The capacity improvement of WPDM, its simple implementation, and the possibility of having optimum waveform designs indicate that WPDM holds considerable promise as a multiple signal transmission technique