Optical pulse position modulation signal receiver and its data processing method

Abstract

An optical pulse position modulating signal receiver and a data processing method thereof are applicable to free space optical communication. The optical pulse position modulating signal receiver consists of a photoelectric multiplier tube, an electric signal processing module and a liquid crystal display, wherein the electric signal processing module consists of an analog digital converter, a first-in-first-out array and a digital signal processor, the photoelectric multiplier tube receives optical signals to convert the optical signals to simulated electric signals, the simulated electric signals are converted into digital signals by the analog digital converter (ADC), are input into a DSP (digital signal processor) through the first-in-first-out (FIFO) array, the DSP performs filter matching, threshold judgment, frame detection and quick RS (radio station) code decoding for the digital signals and transmits corrected information to be displayed on the liquid crystal display. The optical pulse position modulating signal receiver can solve the problem that modulation and demodulation signals can be received on the basis of optical pulse position modulating signals of RS codes under the environment of different signal channels, and is high in computing speed and reliability, convenient in use and fine in expansibility.

Description

technical field [0001] The present invention relates to the reception of an optical pulse modulation signal (abbreviated as OPPM), in particular to an optical pulse position modulation signal receiver based on Reed-Solomon code (abbreviated as RS code) and a data processing method thereof. Background technique [0002] With the continuous development of pulsed lasers, lasers are more and more widely used in the field of optical communication, among which optical fiber communication has high transmission speed, low cost and rapid development. However, due to the need to realize the connection of optical fibers on the physical link, it is not suitable for connectionless space communication and communication between moving objects. Based on free space optical communication, it not only avoids the requirement of optical fiber communication for physical connection, reduces communication cost, but also has good confidentiality. When the laser propagates in the atmosphere, due to ...

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Problems solved by technology

[0009] The problem to be solved by the present invention is to overcome the above-mentioned problems faced by the traditional hard receiver and the computer-based receiving and processing system in the application of free space optical communication, and provide an optical pulse position A modulated signal receiver and its data processing method. This receiver can solve the receiving, demodulating and decoding problems of OPPM based on RS code under different channels, background noise and pulse distortion. The receiver has fast operation speed, high reliability, Easy to use, good scalability, suitable for free space optical communication and other fields

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