基于DPSK的多载波水声跳频通信系统性能仿真  

Performance Simulation of Multi-Carrier Frequency-Hopping Underwater Acoustic Communication System Based on DPSK

作　　者：陈博恒 王明洲[1] 岳玲[1] 寇小明[1] 张文波[1] CHEN Bo-heng;WANG Ming-zhou;YUE Ling;KOU Xiao-ming;ZHANG Wen-bo(The 705 Research Institute,China Shipbuilding Industry Corporation,Xi’an 710077,China)

机构地区：[1]中国船舶重工集团公司第705研究所,陕西西安710077

出　　处：《水下无人系统学报》2020年第2期182-186,201,共6页Journal of Unmanned Undersea Systems

摘　　要：由于海水中介质不均匀分布、海底海面边界条件以及海水声吸收的影响,水声信道极其复杂且不稳定,主要表现为强多途、快时变、可用通信频带有限以及多普勒效应等,现有水声通信系统的抗干扰能力和通信速率尚不能满足需求。基于此,文中针对水声信道的可用通信频带较为有限且具有强多途效应等特点,提出了一种新的水声通信体制。该方法通过结合多载波通信频带利用率高和跳频通信抗多途的优点,建立了采用多载波跳频差分相移键控调制(MC/FH-DPSK)的水声通信系统,对其原理和实现过程进行了详细描述,并给出了该系统在加性高斯白噪声信道、瑞利衰落信道和频率选择性两径瑞利衰落信道下的误码率性能仿真结果。仿真结果验证了该系统具有可靠的抗噪声性能,在跳频间隙与码元宽度设置参数相同的情况下,相比频移键控水声跳频(FH/MFSK)通信系统的带宽利用率提升了近2倍,且抗多途能力性能与其相仿。文中的工作可为水声通信新体制的探索提供理论参考。Focusing on the problem that underwater acoustic channel has limited available communication bands and strong multi-path effects, a new underwater acoustic communication scheme is proposed. A multi-carrier underwater acoustic communication system is established by using differential phase shift keying(DPSK) and making use of the high bandwidth utilization ratio of multi-carrier(MC) communication and the anti-multipath capability of frequency hopping(FH) communication. And its principle and implementation process are described in detail. Moreover, the bit error ratio(BER) performances of the system under additive white Gaussian noise channel, Rayleigh fading channel and frequency-selective two-path Rayleigh fading channel are simulated and analyzed, and its reliable anti-noise performance is verified. Compared with FH/MFSK communication system, the proposed MC/FH-DPSK communication system achieves almost two times higher bandwidth utilization ratio and the similar performance of anti-multipath in the condition of same frequency hopping clearance and parameter of symbol width.

关 键 词：水声信道 多载波通信 跳频通信 多途效应 差分相移键控 

分 类 号：TJ630.34[兵器科学与技术—武器系统与运用工程] TN929.3[电子电信—通信与信息系统]