METHOD FOR CHANGING PSEUDO RANDOM BINARY SEQUENCE TRANSMITTING METHOD OF DIRECT SEQUENCE SPREAD SPECTRUM OF CHANGING PSEUDO RANDOM BINARY SEQUENCE RECEIVING METHOD OF DIRECT SEQUENCE SPREAD SPECTRUM OF CHANGING PSEUDO RANDOM BINARY SEQUENCE TRANSMITTING AND RECEIVING METHOD OF DIRECT SEQUENCE SPREAD SPECTRUM OF CHANGING PSEUDO RANDOM BINARY SEQUENCE

摘要

Disclosed are a method for automatically changing pseudo random binary sequence (PRBS), a direct sequence spread spectrum type transmitting/receiving method for automatically changing PRBS, and a transmitting and receiving method for the same. The direct sequence spread spectrum type transmitting method for automatically changing PRBS comprises: a step of, by a direct sequence spread spectrum type transmitting device, diffusing and modulating data by a direction sequence spread spectrum method using the PRBS to a direct sequence spread spectrum type receiving device, and transmitting a signal with a preamble corresponding in advance to a seed of the PRBS; and a step of receiving the signal from the direct sequence spread spectrum type transmitting device by the direct sequence spread spectrum type receiving device, performing cross correlation and multiple preamble sets including the preamble of the received signal in advance, and detecting the seed corresponding to the preamble having the highest correlation by the cross correlation among the preamble sets and performing reverse-diffusion and demodulation using the PRBS corresponding to the detected seed. According to the present invention, the method for automatically changing the PRBS, the direct sequence spread spectrum type transmitting/receiving method for automatically changing the PRBS, and the transmitting and receiving method for the same are formed to find the preamble corresponding to the seed of the PRBS in advance in a synchronization process of a receiving end by performing the correlation and the various preamble sets predetermined. Therefore, the method for automatically changing the PRBS, the direct sequence spread spectrum type transmitting/receiving method for automatically changing the PRBS, and the transmitting and receiving method for the same can safely improve communication security by safely transmitting the seed to the receiving end and frequently changing the PRBS.