SEQUENTIAL DIGITAL ADAPTIVE EQUALIZER

摘要

PURPOSE:To reduce the scale of memory and the like capacity without deteriorating the equalization characteristic by conducting training based on a training signal in the middle part of a burst signal and applying equalizing processing to data parts before and after tne training signal separately. CONSTITUTION:A burst signal formed by inserting a training signal between data parts is received and stored in a buffer memory 1. The training signal in the burst signal is read and a propagation path impulse response calculation section 2 calculates an impulse response of the propagation path by reading the training signal in the burst signal and using a know training signal. When the processing as to the training signal is finished, the data part before or after the training signal is sequentially read from the buffer memory 1. Then a replica signal based on the impulse response and an equalizing output signal is generated from a replica generating section 3 and adder 5 is used to eliminate a delay wave component and an the result is inputted to a sequential equalization section 4. The sequential equalization section 4 uses the sequential decoding algorithm such as fano algorithm or stack algorithm to conduct equalization processing and an equalization output signal is obtained.