Communication coding method for marine oil exploration acoustic locating transponder

Abstract

The invention discloses a communication coding method for a marine oil exploration acoustic locating transponder, and belongs to the technical field of the seaborne geophysical exploration. The communication coding method for the marine oil exploration acoustic locating transponder comprises the following steps: generating a source code, generating a combination code, and generating a final code, wherein in the step of generating the source code, c is a feedback coefficient and is also a characteristic multinomial coefficient, the values of the coefficients can be ''1'' or ''0'', ''1'' represents that a feedback branch is communicated, ''0'' represents that the branch is cut off, the period of a shifting register output sequence can be changed if the connection states of feedback lines are different, and the value of c determines the feedback connection and the sequence structure of the shifting register; in the step of generating the combination code, firstly, a source code optimization pair is optimized, and the combination code is obtained; and in the step of generating the final code, according to the relevant characteristic, the amount of the combination code and the balance of the combination code, selection is carried out to generate the final code. According to the communication coding method for the marine oil exploration acoustic locating transponder, which is disclosed by the invention, the noise of a receiver is lowered, the signal to noise ratio of the receiver is improved, and meanwhile, the problem of mutual interference due to the fact that a plurality of transponders simultaneously response can be effectively overcome.

Description

technical field [0001] The invention relates to a communication coding method for an acoustic positioning transponder for offshore oil exploration, and belongs to the technical field of offshore geophysical exploration. Background technique [0002] In recent years, with the rapid development of offshore seismic exploration, the exploration workload is also increasing year by year, so more demands and higher requirements are put forward for the offshore acoustic positioning system and its supporting products. Among these requirements, the most important ones are the distance of communication distance and the reliability of communication, and the factors that determine these two key indicators are the coding of the system. At present, there are two main ways of multi-user communication coding: Frequency Division Multiple Access (FDMA) and Time Division Multiple Access (TDMA). Frequency division multiple access is to divide the total frequency band of the communication system...

AI Technical Summary

Problems solved by technology

The disadvantage is that the time-division multiple access mobile communication system needs the synchronization of the whole network, the technology is relatively complicated, and the power consumption of the submarine transponder is relatively large

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