| 摘要 |
A signal transmission method according to the principle of quadrature/amplitude modulation, in which digital data occurring at a time interval T are formed into a transmit signal with the aid of pulse shapers (3a, 3b) having a given unit pulse response r(t) in a transmitter (4), the transmit signal is transmitted by means of a carrier oscillation via a channel (5) having a channel unit pulse response h(t), when an additive white noise w(t) is superimposed on it, so that a receive signal y(t) is present in a receiver (10), and in which the receive signal y(t) is preprocessed by channel-matched filters (7 a, 7b) in the receiver (10), has channel-matched filters (7a, 7b) which are matched to a filter cascade H(t) formed by pulse shapers (3a, 3b) and channel (5) as a whole. The channel-matched filters f(7a, 7b) are preferably transverse filters the data points of which are at a time interval DELTA T which is small in relation to the time interval T of the digital data. An estimation of the channel unit pulse response h(t) is determined in that the unit pulse response of the filter cascade H(t) is convoluted with a filter r-1(t) which is inverse to the pulse shaper.
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