Time dispersion measurement in radio communications systems

Details Time dispersion measurement in radio communications systems Time dispersion measurement in radio communications systems

1997-09-26

2000-07-04

Pham, Chi H.

Multiplex communications

Duplex

Transmit/receive interaction control

370321, 455 676, 375321, 375340, H04B 320, H04B 1700, H03D 124, H03D 100

Patent

active

060848626

ABSTRACT:
Time dispersion of a signal that has been received from a channel is measured by utilizing metrics to determine the energy inside an equalizer window and outside of the equalizer window. In one embodiment, the estimate of the energy outside the window is a difference between residual interference estimates. In another embodiment, the estimate of the energy outside the window is a difference between residual impulse response power estimates.

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J.D. Parsons, et al., "Sounding Techniques for Wideband Mobile Radio Channels: A Review", IEE Proceedings-I, vol. 138, No. 5, Oct. 1991, pp. 437-446.
Jan-Erik Berg, et al., "Specular Reflections from High-Rise Buildings in 900 MHZ Cellular Systems", 41.sup.st IEEE Vehicular Technology Society Conference VTS '91, May 1991, pp. 1-6.
Simon Haykin, "Method of Least Squares", Adaptive Filter Theory, Prentice-Hall, ISBN 0-13-004052-5 025, 1986, Chapter 7, pp. 307-323.

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