Receiver for time-varying distorted signals

Details Receiver for time-varying distorted signals Receiver for time-varying distorted signals

1990-08-07

1993-02-09

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

375 15, H03H 718, H03H 730

Patent

active

051857642

ABSTRACT:
A receiver for time-varying distorted data signals, includes an equalizer and a channel estimator which generates a channel information signal with the aid of a training signal sent together with the data signal and with the aid of an image of the training signal stored in the receiver, and applies this signal to the equalizer. The receiver further includes an arrangement for channel tracking which generates correction values for the channel information signal with the aid of data detected by the equalizer. At very high relative velocities between the sender and the receiver (e.g. 200 km/h when using the mobile radio set in a motor vehicle, for example) a degradation of the bit error rate is avoided in that, at least part of or the complete received training signal is applied to the arrangement for channel tracking prior to the data signals to be equalized and detected after the channel information determined on the basis of the training signal has been transmitted.

REFERENCES:
patent: 4004226 (1977-01-01), Qureshi et al.
patent: 4047013 (1977-09-01), Milewski
patent: 4397029 (1983-08-01), Satorius et al.
patent: 4433425 (1984-02-01), de Jaeger
patent: 4674103 (1987-06-01), Chevillat et al.
patent: 4733402 (1988-03-01), Monsen
A. Baier, "Correlative and Iterative Channel Estimation in Adaptive Viterbi Equalizers for TDMA Mobile Radio Systems," ITG Fachbericht 107, at the ITG Professional Meeting, Stochastische Modelle und Methoden in der Informationstechnik, Nuremberg, Apr. 12-14, 1989, pp. 363-368.

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