Abstract
AbstractSome means to cope with frequency‐selective fading is indispensable to the realization of a wideband digital mobile communication, and various investigations have been made to this end. For example, the decision feedback equalizer (DFE) is considered promising, since it requires smaller‐scale equipment and is versatile in applications.The application of DFE to mobile communication requires tracking to the time‐varying channel as well as the fast initial adaptation. Thus, comprehensive investigations, including the construction of the equalizer and tap‐updating algorithm are needed.The Kalman algorithm is employed as the tap‐updating algorithm. By introducing the memory factor into the algorithm, the tracking performance to the time‐varying channel is improved as well as the speed of the initial adaptation.A computer simulation is made for the proposed method based on the model of 256 kbit/s TDMA system with QPSK modulation. It is verified that DFE is useful in compensating for the frequency‐selective fading in mobile communication.
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