Abstract
We address the problem of channel parameter estimation for time-hopping impulse radio signals received in a multipath environment and in the presence of multi-access interference. The parameters of interest are the attenuations and the delays incurred by the signal echoes in the multipath propagation. A maximum likelihood approach is adopted under the assumption that the symbol data are either known (DA estimation) or unknown (NDA estimation). The effects of the estimation errors on the performance of a Rake receiver are assessed by simulation. The results show that, as the number of users increases, so does the degradation in receiver performance as compared with ideal operation with perfectly known channel parameters. As expected, the DA method has an edge over the NDA in that, for a fixed degradation, it can handle a larger number of users. The number of users that can be accommodated is found by simulation for some values of the system parameters.
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References
M.Z.Win and R.A.Scholtz, “Ultra-Wide Bandwidth Time-Hopping Spread-Spectrum Impulse Radio for Wireless Multiple-Access Communications”, IEEE Trans. Commun., vol. COM-48, pp. 679–691, April 2000.
M.Z.Win and R.A.Scholtz, “Impulse Radio: How it Works”, IEEE Commun. Lett., vol. 2, pp. 10–12, Jan. 1998.
M.Z.Win, R.A.Scholtz and M.A.Barnes, “Ultra-Wide Bandwidth Signal Propagation for Indoor Wireless Communications”, Proc. IEEE Int. Conf. Commun., vol. 1, pp. 56–60, Montreal, Canada, June 1997.
M.Z.Win and R.A.Scholtz, “On the Robustness of Ultra-Wide Bandwidth Signals in Dense Multipath Environments”, IEEE Commun. Lett., vol. 2, pp. 51–53, Feb. 1998.
S.Verdù, Multiuser Detection,Cambridge University Press, 1998.
G.L.Turin, “Introduction to Spread-Spectrum Antimultipath Techniques and Their Application to Urban Digital Radio”, IEEE Proc, vol. 68, pp. 328–353, March 1980.
S.E.Bensley and B.Aazhang, “Maximum Likelihood Synchronization of a Single User Code-Division Multiple-Access Communication Systems”, IEEE Trans. Commun., vol. 46, pp. 392–399, March 1998.
E.G.Strom and F.Malmsten, “A Maximum Likelihood Approach for Estimating DS-CDMA Multipath Fading Channels”, IEEE J.Select. Areas Commun., vol. 18, pp. 132–140, Jan. 2000.
V.Tripathi, A.Mantravati and V.V.Veeravalli, “Channel Acquisition for Wideband CDMA Signals”, IEEE J.Select. Areas Commun., vol. 18, pp. 1483–1494, Aug. 2000.
S.M.Kay, Fundamentals of Statistical Signal Processing: Estimation Theory, Prentice-Hall, Englewood Cliffs, 1993.
A.A.M.Saleh and R.A.Valenzuela, “A Statistical Model for Indoor Multipath Propagation”, IEEE J.Select. Areas Commun., vol. 5, pp. 128–137, Feb. 1987.
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© 2002 Springer Science+Business Media New York
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Lottici, V., D’andrea, A., Mengali, U. (2002). Channel Estimation for Time-Hopping Impulse Radio. In: Fazel, K., Kaiser, S. (eds) Multi-Carrier Spread-Spectrum & Related Topics. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-3569-7_34
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DOI: https://doi.org/10.1007/978-1-4757-3569-7_34
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4419-4945-5
Online ISBN: 978-1-4757-3569-7
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