Study On Dynamic Characteristic Analysis And Signal Detection Technology Of OFDM Over The Random Time-varying Rough Sea Surface

With the strategy of "one Belt and one Road" proposed by general secretary Xi Jinping and the establishment of Hainan Free Trade Zone,Hainan's economic,cultural and technological development has been promoted.Therefore,we should strengthen the information construction in Hainan and make contributions to the construction of science.technology and culture in Hainan Province.Nowadays,China's economy and international trade are growing rapidly,and its overseas trade is also expanding.To speed up the export of trade culture in China,it is necessary to ensure the safety of traders.At the same time,the sea area of our country is very vast.In order to protect the sea area of our country,it is very important to establish a perfect maritime communication system.But nowadays,the maritime communication is still very backward.Compared with the land mobile communication,these drawbacks are caused by the particularity of all aspects of the maritime communication environment.At present,there are many shortcomings in the marine wireless transmission system.For example,the transmission distance,speed,reliability and anti-interference ability.The limited frequency resources at sea have also restricted the development of wireless communication at sea.For the development of wireless communication at sea,it is the most important thing to establish a good wireless system at sea.Nowadays,with the continuous improvement of information technology,wireless communication system will surely develop towards broadband and high-speed wireless communication.This paper focuses on the research of signal transmission dynamic characteristics analysis and signal detection technology of Orthogonal Frequency Division Multiplexing(OFDM)technology for stochastic time-varying rough sea surface.OFDM can effectively counteract inter-symbol interference,and has the characteristics of higher spectrum utilization and better anti-frequency selective fading.OFDM technology is more suitable for transmission in multipath environment and fading channel of high-speed data.In the complex and changeable maritime communication environment,the quality and speed of communication can no longer meet the needs of maritime operations and operations.Wireless communication is disturbed by various aspects,such as the earth's radian and rough sea surface,or the shielding effect of ships,waves and so on.At the same time,there are deep fading and multipath effects over the sea.Therefore,it is necessary to establish a broadband wireless communication system on the sea.In this paper,the performance of OFDM technology is mainly studied,and the application of broadband wireless communication system on the sea based on OFDM technology is analyzed and studied according to the actual trial situation.Compared with other modes of maritime communication,the use of OFDM technology can make maritime communication faster and more effective,improve the efficiency of information transmission,reduce the cost of communication,increase the capacity of the system,and reduce the communication delay.By comparing the transmission of OFDM communication on the road,we can make good use of OFDM technology on the sea,make OFDM technology play its advantages well,contribute to the development of wireless communication on the sea,and lay a solid foundation for the future theory of wireless communication on the sea.