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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Hongbing Zhang Fan, H.H. Lindsey, A. |
| Copyright Year | 2001 |
| Description | Author affiliation: GIRD Syst. Inc., Cincinnati, OH, USA (Hongbing Zhang) |
| Abstract | One significant difference between CDMA systems and FDMA/TDMA systems is that the number of users supported in a CDMA system is not hard-limited by the number of frequency bands or time slots. Whenever a new user is added to a CDMA system, the existing users will suffer a slightly higher interference level. The interference level highly depends on the orthogonality of user waveforms. We present an algorithm to construct a set of wavelet packet based user waveforms for CDMA systems. This algorithm provides more signature waveforms than previously proposed wavelet packet based waveform division systems. The basic waveform set is constructed utilizing double orthogonality based on wavelet packets and binary Walsh codes. This double orthogonality produces auto- and cross-correlations that are much better than the conventional wavelet packet sets and are comparable to the pseudo random binary codes. Under system overload, the waveforms introduce a tolerable interference level to the users. |
| Starting Page | 1025 |
| Ending Page | 1029 |
| File Size | 468667 |
| Page Count | 5 |
| File Format | |
| ISBN | 0780370058 |
| ISSN | 10903038 |
| DOI | 10.1109/VTC.2001.956929 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2001-10-07 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Multiaccess communication Wavelet packets Interference Algorithm design and analysis Timing Amplitude modulation Narrowband Binary codes Detectors Contracts |
| Content Type | Text |
| Resource Type | Article |
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