Low-frequency band sound wave communication data transmission anti-interference coding algorithm

Abstract

The invention provides a low-frequency band sound wave communication data transmission anti-interference coding algorithm, comprising the steps of determining available coding frequency points: 1100HZ, 1200HZ, 1300HZ, 1400HZ, 1500HZ, 1600HZ,1700HZ, 1800HZ, 1900HZ, 2000HZ, 2100HZ, 2200HZ, 2300HZ, 2400HZ, 2500HZ, 2600HZ, 2700HZ, 2800HZ and 2900HZ, totally 19 frequency point resources, wherein everytwo coding frequency points are spaced by 100HZ; carrying out mixed coding through adoption of three coding frequency points according to the determined 19 frequency point resources, and fixing middlecoding frequency points as 1800HZ, 1900HZ and 2000HZ, wherein the same energy decibel value is employed for the three coded sound wave coding frequency points; and obtaining a specific coding combination value according to a coding rule. The transmission reliability under a relatively complex sound environment can be greatly improved, the probability of being interfered by the environment is reduced, the transmission accuracy is improved, the efficiency is improved, and the reliable and practical low-cost little data communication method is provided in an application with relatively cheap sound sending and receiving devices.

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...

AI Technical Summary

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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