摘要
正交频分复用(OFDM)技术具有抗多径、频带利用充分、传输数据率高的优点,在水声通信中具有重要的发展前景。但是目前的相关研究多集中在几百米到几千米的近程水声通信,随着传输距离的增加,信道条件恶劣,多径、多普勒频移影响加剧,需要设计相应的OFDM系统并采取有效手段改善系统性能。该文综合分析了10公里距离水声通信的影响因素,设计出相应OFDM系统和合理系统参数,仿真了系统对信道、多普勒影响的校正,并给出湖试结果。分析表明该系统性能可靠,传输数据率高。
OFDM （Orthogonal Frequency Division Multiplexing） has many advantages such as counter - muhipaths, fully use of the frequency band and high data rate, and has a promising future in UWA communication. At the beginning, almost all the researches are about short - range communication. The longer the transmission range is, the worse the underwater conditions are due to the multipaths and Doppler effects, so there exists a need to design the system parameters and take practical methods to improve the system. In this paper, a new communication system based on OFDM is proposed, aiming at reliable 10km shallow water communication, and revisions of multipaths and Doppler effect are simulated. Additionally the lake experiments show that the method is reliable and with high data rate in 10km UWA communication.
出处
《计算机仿真》
CSCD
2006年第2期18-20,278,共4页
Computer Simulation
