In order to satisfy the requirement for the multi-channel multi-parameter simulated signal generator in the underwater multi-target localization and tracking, an underwater multi-channel multi-parameter simulated signal generator based on USB and FPGA is designed and developed. The key problems of producing multi-channel signals independently or jointly, generating long data uninterruptedly, and controlling the parameters of the outputs and channels synchronously are solved. The experimental results show that this signal generator is real-time and convenient, and can be used not only in the study on multi-target detection and tracking, but also as a multi-channel arbitrary signal generator.

提出了一种基于DSP实时处理的水下个人语音水声通信系统的设计方案,构建了通信系统的结构模型,方案中采用CELP码激励线性预测编码,差分MPSK调制,卷积信道编码,以及判决反馈均衡技术,并对其关键技术进行了性能仿真和分析比较.结果表明,该系统可满足语音信息在水下信道的传输,有良好的原始语音恢复性能,误码率在10-3以下,具有较好的开发潜力.