21-01-2021 дата публикации
Номер: US20210021296A1
Принадлежит:
The present disclosure discloses an M-ary DCSK method based on chaotic shape-forming filtering. The method includes the following steps: at S1, parameters of a communication system are set; at S2, HP information and LP information to be sent in each time slot are prepared; at S3, the information to be sent is modulated; at S4, a chaotic carrier is generated through a chaotic shape-forming filter; at S5, a transmitted signal is prepared; at S6, down-carrier frequency and matched filter is performed to a received signal; at S7, the sampling of a maximum SNR point is performed to an output signal of a matched filter; at S8, the decision of high priority information bits is resumed; and at S9, the decision of low priority information bits is resumed. 2. The M-ary DCSK method based on chaotic shape-forming filter as claimed in claim 1 , wherein an operation at Step 2 comprises:{'sub': l', '1', '2', 'l', 'N', {'sub2': 's'}, '1', '2', 'N', {'sub2': 's'}], 'sup': HP', 'HP', 'HP', 'HP', 'LP', 'LP', 'LP', 'LP, 'preparing HP information B=(b,b, . . . , b) and LP information B=(b,b, . . . ,b) to be sent in each transmission time slot, wherein a value of each information bit to be sent is 1 or 0.'}5. The M-ary DCSK method based on chaotic shape-forming filter as claimed in claim 4 , wherein an operation at Step 5 comprises: {'br': None, 'i': T=u', 't', 'f', 't, 'sub': 'c', '()·sin(2π);'}, 'performing digital up-carrier processing to the chaotic carrier signal u(t) to obtain a channel transmission signal T(t), and an expression of the T(t) is{'sub': 'c', 'wherein fis a digital up-carrier frequency.'} The present disclosure claims priority of Chinese Patent Application No. 201910655934.1, filed to China Patent Office on Jul. 19, 2019. Contents of the present disclosure are hereby incorporated by reference in entirety of the Chinese Patent Application.The present disclosure relates to the technical field of Chaotic Spread Spectrum (CSS) Communication, and in particular to an M-ary ...
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