| 摘要 |
FIELD: information technology. ^ SUBSTANCE: information unit of five pulses is encoded in form of a sequence of one positive pulse, one positive pulse magnified N times, one positive pulse, one negative pulse and one positive pulse, and an information zero of five pulses is encoded in form of a sequence of one negative pulse, one negative pulse magnified N times, one negative pulse, one positive pulse and one negative pulse; the obtained sequences are transmitted to a data transmission medium, and at the receiving side, the received signal is compared with reference signals through cross-correlation. At the transmitting side, the apparatus includes an amplifier whose input is connected to a stage which generates the second pulse of the five-pulse signal, the output is connected to an adder, and at the receiving side, there is a similar amplifier whose input is connected to the output of a delay line, corresponding to the second pulse of the five-pulse signal, the output of the amplifier is connected to an adder. ^ EFFECT: improved noise immunity. ^ 2 cl, 9 dwg |
