A modulation and demodulation system suitable for use with a modem (modulator and demodulator apparatus) of a first polling type. The system allows reproduction of a signal necessary for initialization of a reception section of a modulator and demodulator apparatus with certainty in a short training...http://www.google.de/patents/US5537437?utm_source=gb-gplus-sharePatent US5537437 - Initialization equalization for modulation and demodulation using special training pattern
