Wavelet Packet Based Multicarrier CDMA Wireless Communication Systems
Hongbing Zhang · OhioLink ETD Center (Ohio Library and Information Network) · 2004
As demand for higher data rates is continuously rising, there is always a need to develop more efficient wireless communication systems.The work described in this thesis is our effort in this direction.We have developed and evaluated a wavelet packet based multicarrier CDMA wireless communication system.In this system design a set of wavelet packets are used as the modulation waveforms in a multicarrier CDMA system.The need for cyclic prefix is eliminated in the system design due to the good orthogonality and time-frequency localization properties of the wavelet packets.New detection algorithms are developed to work in either time domain or wavelet packet domain to combat multiuser and inter symbol interferences.Better performance is achieved by utilizing the saved cyclic prefix overhead for error correction coding.In developing the above system and detection algorithms, we also explored a new method of channel modeling by using wavelet packets as basis functions.ACKNOWLEDGEMENT I would like to give my thanks to my advisor, Dr. Fan.Without his guidance and support I would have never involved in and completed this interesting work.His valuable thoughts and recommendations is critical throughout all the stages of this work.I also would like to thank Dr Wee