| Inheriting all merits of a multiuser transmitted reference (MTR) ultra-wideband (UWB) transceiver, a biorthogonal MTR (BO-MTR) transceiver for high data-rate communication has been recently reported. It utilizes 4-ary biorthogonal signaling to carry two bits of each user's information in amplitude and position of the data pulse simultaneously. Assisted by a simple coding scheme, both bits are independently decoded using low complexity correlators whose templates are obtained from aggregated reference signals spanning multiple symbol intervals. This paper further studies its performance in different scenarios. In a multipath-free fading scenario, the receiver's symbol error rate (SER) performance is shown to be optimal while no complex joint detection of two bits is necessary, and the bit error rate (BER) performance of each detector is balanced. For multipath channels, when channel parameters are either deterministic and estimated with errors, or random in Rician distribution, the Chernoff bounds are derived for BER of each detector. A much tighter bound is also provided according to the property of the complementary Gaussian distribution function. |
| Daniel Xu received both the B.S. and M.S. degrees in electronic engineering from Tsinghua University, Beijing, China, in 1989 and 1991 respectively, and the Ph.D. degree in electrical engineering from Stevens Institute of Technology, Hoboken, NJ, in 1999.
From 1991 to 1996, he worked as an engineer and department manager at the Tsinghua Unisplendour Group Corp. of Tsinghua University. Since 1999, he has been with the Department of Electrical Engineering, University of California, Riverside, as an assistant professor and currently associate professor with tenure. His research interests include detection and estimation theory, spread spectrum and ultra-wideband wireless technology, wireless optical communication, wireless sensor networks and network security.
Dr. Xu received the Outstanding Student Award and the Motorola Scholarship from Tsinghua University, and the Peskin Award from Stevens Institute of Technology. He also received the Academic Senate Research Award and the Regents' Faculty Award from University of California, Riverside. He has served as a session chair and technical program committee member for various international conferences. He is an IEEE senior member, an elected member of the IEEE Signal Processing Society's Technical Committee on Signal Processing for Communications, an associate editor for the IEEE Transactions on Signal Processing, Transactions on Vehicular Technology and guest editor for the IEEE Journal of Selected Topics in Signal Processing, special issue on Performance Limits of Ultra-Wideband Systems. He served as an associate editor for the IEEE Communications Letters for three years. |