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为了满足水声通信以及水下信号处理和目标识别等方面对高速实时并行处理系统的要求,文章设计并研制了一种基于4片SHARC-DSP芯片(ADSP21160)和多通道同步采样ADC芯片的多处理器并行数字信号处理系统,解决了水声通信与阵列信号处理中多通道同步采样和大数据量的高速实时处理的问题,同时该系统具有良好的稳定性和通用性。 相似文献
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ADSP-TS101 is a high performance DSP with good properties of parallel processing and high speed. According to the real-time processing requirements of underwater acoustic communication algorithms, a real-time parallel processing system with multi-channel synchronous sample, which is composed of multiple ADSP-TS101s, is designed and carried out. For the hardware design, field programmable gate array (FPGA) logical control is adopted for the design of multi-channel synchronous sample module and cluster/data flow associated pin connection mode is adopted for multiprocessing parallel processing configuration respectively: And the software is optimized by two kinds of communication ways: broadcast writing way through shared bus and point-to-point way through link ports. Through the whole system installation, connective debugging, and experiments in a lake, the results show that the real-time parallel processing system has good stability and real-time processing capability and meets the technical design requirements of real-time processing. 相似文献
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Tiger SHARC系列的ADSP-TS101是ADI公司开发的一款高性能的利于并行处理的高速信号处理器.为了实现水下多目标定位算法的实时处理,设计并实现了由FPGA和ADSP-TS101构成的多通道同步采样和多处理器并行实时处理系统;该系统采用FPGA的逻辑控制,完成了多通道同步采样.采用多处理器并行结构,完成了多目标定位系统中方位估计算法的实时并行实现,解决了在水下多目标定位系统的多通道同步采样和大数据量的高速实时处理的问题;实验结果证明,该系统具有良好的稳定性和通用性,满足了多目标定位的高速实时处理要求. 相似文献
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在水下目标检测和跟踪系统中,多目标方位估计算法起着重要的作用,MUSIC算法是最具代表性的方法;为了满足目标方位估计对高速实时并行处理技术的要求,针对水下阵列信号处理的实际应用,采用有效的并行算法和并行结构来减少运算量,设计并研制了一种基于4片ADSP-TS101S的多处理器并行实时处理系统;经过对算法的运算时间和方位估计的性能进行分析,表明该系统提高了处理效率,解决了阵列信号处理中大运算量的高速实时处理的问题,具有良好的方位估计性能和实时处理能力,满足工程实际需求。 相似文献
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Study on M-ary Spread Spectrum Underwater Acoustic Communication 总被引:1,自引:0,他引:1
Aim at the low data rate of direct sequence spread spectrum underwater acoustic communication,a higher data rate spread spectrum system based on orthogonal sequences was designed.Lake tests were conducted and the results showed the data rate of 189 bps with BER less than 10^-4 and SNR about 0 dB in the range of 25 km.In order to improve the data rate of MNSS,a time overlapping method is introduced.The simulation results,based on the real channel model,show its robustness and relative data rate improvement with slight performance decrease if the number of sequences N is small.Meanwhile,a novel method for combining multipath messages using FFT/IFFT is also proposed to improve the performance of matched filters in underwater multipath environments.Simulation results show its effectiveness. 相似文献
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在水下目标检测和跟踪系统中,多目标检测算法起着重要的作用,AIC算法是最具代表性的方法。为了满足目标检测对高速实时并行处理技术的要求,针对水下阵列信号处理的实际应用,采用有效的并行算法和并行结构来减少运算量,设计并研制了一种基于4片ADSP-TS101S的多处理器并行实时处理系统。经过对算法的运算时间和目标检测的性能进行分析,表明该系统提高了处理效率,解决了阵列信号处理中大运算量的高速实时处理的问题,具有良好的目标检测性能和实时处理能力,满足工程实际需求。 相似文献