Series light emitting diode array-based detection bandwidth improvement method applied to underwater wireless optical communication system

Abstract

The invention belongs to the technical field of underwater wireless optical communication, and discloses a bandwidth improving method of a detector based on a series light emitting diode (LED) array, which is applied to an underwater wireless optical communication system, and analyzes bandwidth restrictive factors of the underwater wireless optical communication system adopting LEDs as transmitting and receiving ends. When an LED array is used as a detector of an underwater wireless optical communication system, theoretical analysis and simulation are carried out on the improvement effect of the normalized bandwidth of the system in a series connection mode. On the basis that the detection area is increased by adopting the LED array at the receiving end, the system bandwidth is effectively improved by adopting a series connection mode, so that the alignment difficulty of the underwater wireless optical communication system based on LED detection is reduced, and the data rate of the system is improved. According to the invention, the system capacity of an underwater wireless optical communication system adopting an LED as a transmitting and receiving end at present can be effectively improved, the performance of the system is verified through experiments, and the system has practical significance of multiplexing an existing lighting system to transmit and receive optical signals.

Description

technical field [0001] The present invention relates to the technical field of underwater wireless optical communication, and more specifically, relates to a method for increasing the bandwidth of a detector based on a serial light-emitting diode array used in an underwater wireless optical communication system. Background technique [0002] With the enrichment of marine resources development means and the improvement of the demand for underwater environment monitoring, underwater wireless communication technology is facing diversified demands. Due to the skin effect, the attenuation of electromagnetic waves propagating in water is extremely large, and the transmission distance of traditional high-speed radio frequency communication under water is extremely short. At present, underwater acoustic communication is the most widely used underwater communication technology, but it is often limited by the disadvantages of low rate, high delay, and complex channels. With the advan...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of insufficient bandwidth of the current underwater wireless optical communication system based on LEDs as detectors, and proposes a method of using an array of series-connected LEDs as a detector at the receiving end to effectively compensate the system frequency response High-frequency attenuation, thereby improving the normalized bandwidth of the system, increasing the system capacity, and reducing the bit error rate

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