receiving apparatus based on correlation width for underwater acoustic communication system with differential phase shift keying and receiving method thereof

摘要

In order to improve the restoration accuracy of a symbol, the present invention is characterized in that a modulation signal in which a symbol corresponding to one bit data is diffused and transmitted according to a predetermined pseudo noise code is received, and a phase difference between a pair of consecutive symbols A receiver processor for receiving and filtering the modulated signal and transmitting a filtered signal; and a receiver for receiving the modulated signal and restoring the bit data corresponding to the received signal. A delay unit for delaying the filtered signal by a period corresponding to one symbol to transmit a delayed signal; A first correlator for generating a first output signal by mixing a target symbol of the filtered signal and a reference symbol of the delayed signal corresponding to a pair of consecutive symbols of the modulated signal; A second correlator for generating a second output signal by mixing the inverse symbol of which the waveform of the object symbol is inverted and the reference symbol; And extracting an output position of the main pick from a width between the first output signal and the second output signal and comparing the first output signal and the second output signal based on the extracted output value of the main pick, And a decision unit which decodes the bit data of the object symbol and restores the bit data of the object symbol.