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用LH9124开发通用FFT模板及其在SAR实时成像处理中的应用 总被引:1,自引:0,他引:1
新一代高分辨率、远作用距离机载合成孔径雷达(SAR)成像侦察系统中,作为实时成像处理器核心运算部件的高速DSP模板的研制是最为关键的一环,其他关键技术的方案和实现在很大程度上由它来决定.在SAR成像中所使用的时域-频域快速相干算法以FFT为时频变换工具,SHARP公司的DSP专用芯片LH9124及其配套芯片LH9320可以完成相应的高速FFT运算.本文介绍了采用LH9124/LH9320实现DSP运算的几种方案及F9124通用FFT模板的研制,主要用于完成SAR实时成像处理器方位多视处理过程的运算,通过合理配置可适用于其它需要高速DSP运算的场合.本文还概述了如何将LH9124/LH9320与TMS320系列DSP器件配合使用完成SAR实时臧像方位处理的方案. 相似文献
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星载SAR实时成像处理器的FPGA实现 总被引:9,自引:0,他引:9
本文提出了一种用FPGA实现星载合成孔径雷达实时成像处理器的方法,用来实现星载SAR的CS算法(或RMA算法).该实时成像处理器由7片Xilinx公司的商业FPGA实现,其中4片作为并行的处理单元;一片为CS因子的生成单元;一片为SDRAM控制单元;一片为系统的控制单元.该系统将流水处理和并行处理相结合,从而极大的减少了处理时间.同时根据算法各运算对数据的精度要求不同,将浮点运算和定点运算结合在一块,减少了硬件开销.该系统工作在100MHz时,33秒左右能完成16k*16k星载样本点的成像,并对加拿大Radarsat的雷达原始信号进行成像处理,成像质量能达到要求. 相似文献
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用ADSP21062高速信号处理系统实现机载SAR实时成像处理器的方位向处理 总被引:1,自引:0,他引:1
机载SAR实时成像处理器可以在载机飞行的同时获得高分辨率的SAR图像,对于实时监测、军事侦察等应用具有重要意义。实时成像处理器就是用高速数字信号处理系统来实时地实现SAR的成像算法。该文介绍SAR实时成像处理器方位向处理部分的研制,该部分采用了自行开发的、基于ADSP21062的高速信号处理系统,8片ADSP21062被安排在4个并行处理通道中,具有960MFLOPS的峰值处理速度,优化的软件设计保证了硬件资源的利用效率。仿真测试和外场实验证明了该系统的设计是成功的。该文对方位向处理部分的实现原理、硬件结构、软件设计进行了详细介绍。 相似文献
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视频处理机是基于TI的DSPTM320DM642芯片设计,高速信息处理性能,计算能力达4Gips使视频处理达到理想效果,可以做实时的视频采集,实现复杂的音视频压缩算法,带有以太网口,可以通过网络传输数据。主要应用于网络视频监控和其它复杂图象处理的高速DsP应用。 相似文献
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《Microelectronics Journal》2015,46(7):637-655
This paper proposes a new processor architecture called VVSHP for accelerating data-parallel applications, which are growing in importance and demanding increased performance from hardware. VVSHP merges VLIW and vector processing techniques for a simple, high-performance processor architecture. One key point of VVSHP is the execution of multiple scalar instructions within VLIW and vector instructions on unified parallel execution datapaths. Another key point is to reduce the complexity of VVSHP by designing a two-part register file: (1) shared scalar–vector part with eight-read/four-write ports 64×32-bit registers (64 scalar or 16×4 vector registers) for storing scalar/vector data and (2) vector part with two-read/one-write ports 48 vector-registers, each stores 4×32-bit vector data. Moreover, processing vector data with lengths varying from 1 to 256 represents a key point for reducing the loop overheads. VVSHP can issue up to four scalar/vector operations in each cycle for parallel processing a set of operands and producing up to four results to be written back into VVSHP register file. However, it cannot issue more than one memory operation at a time, which loads/stores 128-bit scalar/vector data from/to data memory. The design of our proposed VVSHP processor is implemented using VHDL targeting the Xilinx FPGA Virtex-5 and its performance is evaluated. 相似文献
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《电子学报:英文版》2017,(6):1198-1205
FPGA based soft vector processing accelerators are used frequently to perform highly parallel data processing tasks. Since they are not able to implement complex control manipulations using software, most FPGA systems now incorporate either a soft processor or hard processor. A FPGA based AXI bus compatible vector accelerator architecture is proposed which utilises fully pipelined and heterogeneous ALU for performance, and microcoding is employed for reusability. The design is tested with several design examples in four different lane configurations. Compared with Central processing unit (CPU), Digital signal processor (DSP), Altera C2H tool and OpenCL SDK implementations, the vector processor improves on execution time and energy consumption by factors of up to 6.6 and 6.4 respectively. 相似文献
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Shahriar Shahabuddin Janne Janhunen Markku Juntti Amanullah Ghazi Olli Silvén 《Analog Integrated Circuits and Signal Processing》2014,78(3):611-622
In order to meet the requirement of high data rates for next generation wireless systems, efficient implementations of receiver algorithms are essential. On the other hand, faster time-to-market motivates the investigation of programmable implementations. This paper presents a novel design of a programmable turbo decoder as an application-specific instruction-set processor (ASIP) using transport triggered architecture (TTA). The processor architecture is designed in such a manner that it can be programmed with high level language to support different suboptimal maximum a posteriori (MAP) algorithms in a single TTA processor. The design enables the designer to change the algorithms according to the frame error rate performance requirement. A quadratic polynomial permutation interleaver is used for contention-free memory access and to make the processor 3GPP LTE compliant. Several optimization techniques to enable real time processing on programmable platforms are introduced. The essential parts of the turbo decoding algorithm are designed with vector function units. Unlike most other turbo decoder ASIPs, high level language is used to program the processor to meet the time-to-market requirements. With a single iteration, 68.35 Mbps decoding speed is achieved for the max-log-MAP algorithm at a clock frequency of 210 MHz on 90 nm technology. 相似文献
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实时中值滤波器的实现 总被引:4,自引:0,他引:4
针对二维中值滤波器的邻域数据处理的特点,提出了基于邻域图像帧存在体的并行处理方法,从而实现了实时的中值滤波器,论述了领域数据的形成及并行处理器结构,给出了3*3实时的中值滤波器系统的逻辑框图。 相似文献
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《Very Large Scale Integration (VLSI) Systems, IEEE Transactions on》2008,16(10):1321-1334
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按频率抽取的基4FFT算法在FPGA中实现 总被引:2,自引:0,他引:2
雷达成像的数据处理运算量非常巨大,要达到准实时甚至全实时的成像处理速度,就需要高性能的处理设备。结合自己的工程实践,介绍了按频率抽取的基4 FFT算法在FPGA器件中的实现。基于高速FPGA的SAR实时信号处理机是该系统的核心部分,这方面的研究国内才刚刚起步,该文的工作对SAR雷达系统的硬件实现具有重要意义,为SAR实时成像处理提供了一条有效途径,具有良好的应用前景,此技术的实现在实时信号处理领域也具有重要意义。 相似文献