TR2006-023
| TOA Estimation for IR-UWB Systems with Different Transciver Types | |||
| Citation: |
Guvenc, I.; Sahinoglu, Z.; Orlik, P., "TOA Estimation for IR-UWB Transceiver Types: AWGN Channel Analysis", IEEE International Conference on Communications (ICC), June 2006 (ICC 2006) * Guvenc, I.; Sahinoglu, Z.; Orlik, P.V., "TOA Estimation for IR-UWB Systems with Different Transceiver Types", IEEE Transactions on Microwave Theory and Techniques, ISSN: 0018-9480, Vol. 54, Issue 4, Part 2, pp. 1876-1886, June 2006 (IEEE Xplore) | ||
| Date: | April 2006 | ||
| MERL Contacts: | Zafer Sahinoglu, Philip Orlik | ||
In this paper, performances of stored reference (RE), transmitted-reference (TR), and energy detection (ED)based time of arrival (TOA) estimation techniques are analyzed for impulse-radio ultra-wideband (IR-UWB) systems at sub-Nyquist sampling rates. First, an additive while Gaussian noise (AWGN) channel is considered to emphasize certain fundamental issues related to these different transceivers. In particular, energy collection characteristics and decision statistics are presented. Probability of accurate peak detection is analyzed for each transceiver; and receiver operating characertistics for the leading edge are derived. Effects of number of pulses per symbol and number of averaging symbols are investigated in detail. Then, realistic multipath channels are addressed; and various maximum likelihood estimation approaches are investigated. A new estimator that jointly exploits the noise statistics and power delay profile of the channel is proposed, and a Bayesian estimator that (ideally) gives a lowe bound is analyzed. Simulation results show that while ED and TR have better energy colleciton capabilities at low-rate sampling, they suffer from distributing the energy over time. | |||
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