Kalman equalizer

Details Kalman equalizer Kalman equalizer

1981-12-31

1984-09-18

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

364124, 333 18, H04L 2503, H03H 1502, H04B 318

Patent

active

044728123

ABSTRACT:
An improved Kalman equalizer for providing a tap weight of a transversal filter for equalizing a transmission line has been found. A complex number fast Kalman equalizer (FIG. 27), which is the improvement of the prior fast real number Kalman equalizer (see; "Fast calculation of gain matrices for recursive estimation schemes" by Lennart Ljung, et al, INT. J. Control, 1978, vol. 27, No. 1, 1-19), has a complex conjugate generator (C.sub.2) for processing a complex input signal so that an equalization can be performed on the bandwidth division concept, and a transmission line having a complex impulse response can be equalized. Then, a bandwidth division equalization in which a whole bandwidth is separated into a plurality of sub-bandwidth each being equalized by a related sub-equalizer becomes possible. Also, a QAM signal (Quadrature Amplitude Modulation) which has a complex impulse response can be equalized. A bandwidth division fast Kalman equalizer (FIG. 68) is also possible as the modification of the present invention.

REFERENCES:
patent: 4288872 (1981-09-01), Tamburelli
patent: 4320526 (1982-03-01), Gitlin
International Journal of Control U.S.A., 1978, vol. 27, No. 1, pp. 1-19.

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