| 摘要 |
A method for signal reception in a digital communication system and a device for implementation thereof relate to radio engineering and may be used in digital communication systems of different application. According to the method with help of keys K1KN every bit of code pulse sequence infected with noise, having duration Тс, is strobed with sequence of short pulses havingduration and Тс quasiperiod. Pulse sequences controlling keys, which come from a shaper, follow with Тс period and are shifted one relatively another to Т, 2Т, 3Т, ..., (N-1)T. Thereby, K1KN keys connect one by one signal with noise to outputs of delay devices &Pgr;31&Pgr;3N-1, which delay all pulses except for last one for time,, ...,. As a result, all pulses are summed within the same time interval that results in increase of signal/noise ratio. Oscillations from adder output enter to a threshold devise. After a limiter amplifier, noise-free short pulses activate triggers, which generate signals of corresponding polarity with duration equals to bit length. Technical result is increase of sensitivity and a noise immunity of digital communication systems. |
