Method of equalizing a receive data block in a time-division mul

Details Method of equalizing a receive data block in a time-division mul Method of equalizing a receive data block in a time-division mul

1994-03-02

1996-07-16

Chin, Stephen

Pulse or digital communications

Equalizers

Automatic

375232, 375348, 370 953, H03H 730

Patent

active

055374387

ABSTRACT:
In mobile radio communications systems using time-division multiple access (TDMA), intersymbol interference caused by time differences in multipath media is avoided by equalizing data blocks. When a data block (BD) is received, the impulse response of the channel on which the block was transmitted is estimated, a set of receive parameters (PP) is evaluated, an optimal length (Nopt) of the block (BD) is determined from the parameters (PP), and when the optimal length (Nopt) is less than the actual length (N) of the block (BD), channel variation tracking (PO) is undertaken.

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Doherty eet al, "Equalization for Mobile Communications Channels", 1990 IEEE Military Communications Conference, vol. 2 of 3, Sep. 1990, pp. 643-647.
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G. W. Davidson, et al, "An investigation of Block-Adaptive Decision Feedback Equalization for Frequency Selective Fading Channels", Can. J. Elect. & Comp. Eng., vol. 13, No. 3-4, 1988., pp. 106-111.
Robert A. Ziegler, et al "Estimation of Time-Varying Digital Radio Channels", IEEE Transactions On Vehicular Technology, vol. 41, No. 2, May 1992, pp. 134-151.

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