Abstract: A dynamic reconfigurable digital system is proposed. By defining modulation and demodulation as reconfigurable modules, the proposed modem changes its modulation scheme and data rate according to underwater channel estimation results to provide low bit error rate and low energy consumption communication. The digital system is implemented on Xilinx XUPV5 FPGA board. Hardware and software co-verification show that the digital system works correctly and can be reconfigured to 2FSK and 2PSK mode. Compared to traditional FPGA development approach, dynamic reconfigurable design method improves flexibility of algorithm design and saves resource utilization of the digital system.

Key words: acoustic modem, dynamic reconfigurable, underwater sensor network, embedded system

摘要： 提出一种动态可重构的水下声学调制解调器数字系统, 此系统将调制、解调模块定义为可重构模块, 根据水下声学信道的检测结果, 动态调整其调制解调方式和数据率, 以提供低误码率、低能耗的通信。在Xilinx XUPV5 FPGA开发板上完成数字系统的实现与软硬件协同验证, 结果表明功能正确, 数字系统可以动态配置为2FSK和2PSK模式。与传统FPGA实现方法相比, 动态可重构的设计方法提高了算法设计的灵活性, 节约了数字系统硬件实现的资源。

关键词: 水声调制解调器, 动态可重构, 水下无线传感器网络, 嵌入式系统