An anti-interference coding method for low-frequency acoustic wave communication data transmission

Abstract

The present invention provides an anti-interference encoding algorithm for low-frequency acoustic wave communication data transmission, including determining available encoding frequency points: 1100HZ, 1200HZ, 1300HZ, 1400HZ, 1500HZ, 1600HZ, 1700HZ, 1800HZ, 1900HZ, 2000HZ, 2100HZ, 2200HZ, 2300HZ, 2400HZ, 2500HZ, 2600HZ, 2700HZ, 2800HZ, 2900HZ a total of 19 frequency resources, the interval between each coding frequency point is 100HZ; according to the determined 19 frequency point resources, use three coding frequency point mixed coding, and fix the middle coding The frequency points are: 1800HZ, 1900HZ, 2000HZ; the three encoded sound wave encoding frequency points adopt the same energy decibel value; according to the encoding rules, the specific encoding combination value can be obtained, which can greatly improve the transmission reliability in a more complex sound environment and reduce the The probability of being disturbed by the environment improves the accuracy of transmission and thus improves the efficiency, and provides a reliable, practical, and low-cost means of small-volume data communication in applications where sound sending and receiving equipment is relatively cheap.

Description

[technical field] [0001] The invention relates to the technical field of encoding algorithms, in particular to an anti-interference encoding algorithm for low-frequency band acoustic wave communication data transmission with high reliability, practicality and low cost. [Background technique] [0002] Existing security monitoring and all walks of life have used sound waves as a means of data communication. The main channel of sound waves is 20HZ-20KHZ. If the frequency is too low, the transmission efficiency is low and it is easy to be interfered. Negative impact, so the main application transmission frequency band of consumer electronics is 1KHZ-10KHZ. In the application products with limited hardware performance, the sampling frequency of 8KHZ is mainly used. In this case, the transmission frequency range is limited to the range of 1KHZ-3KHZ. The biggest challenge of 1KHZ-3KHZ sound wave communication is: this frequency band is used for human speech and daily life. The mai...

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Problems solved by technology

[0002] Existing security monitoring and all walks of life have used sound waves as a means of data communication. The main channel of sound waves is 20HZ-20KHZ. If the frequency is too low, the transmission efficiency is low and it is easy to be interfered. Negative impact, so the main application transmission frequency band of consumer electronics is 1KHZ-10KHZ

In the application products with limited hardware performance, the sampling frequency of 8KHZ is mainly used. In this case, the transmission frequency range is limited to the range of 1KHZ-3KHZ. The biggest challenge of 1KHZ-3KHZ sound wave communication is: this frequency band is used for human speech and daily life. The main frequency band of sound, very susceptible to interference

Common applications either use higher hardware configurations to increase the communication frequency band to 5KHZ-10KHZ, which increases hardware costs and system resource consumption

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