Method for modulating polarization differential pulse position
A modulation method and differential pulse technology, which can be used in electrical components, transmission systems, etc., to solve the problems of insufficient bandwidth utilization, unsuitable underwater mass data transmission, and high bit error rate.
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[0026] The present invention will be further described below with reference to the accompanying drawings and in combination with preferred embodiments.
[0027] The present invention mainly optimizes the symbol structure of the DPPM modulation mode, and introduces light pulses of different polarization directions into the symbols, thereby forming a signal composed of an initial pulse and no continuous "0" time slots. The specific method is as follows "
[0028] The polarization differential pulse position modulation method introduces light pulses with different polarization directions in the coding symbols to represent the initial pulse, using N ( N ≥2, preferably 2 or a multiple of 2) light pulses with different polarization directions to represent different information, which includes the following steps:
[0029] A. Segment raw data into M an ordered sequence of groups of bit binary data;
[0030] B. For each group M bit binary data, write it as , and define ;
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