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中文摘要：
随机共振作为一种新颖的信号处理手段在各个领域得到广泛应用，它的硬件实现具有重要的工程应用价值。介绍了一种便携式变步长随机共振仪，硬件采用片上系统（system on chip）作为CPU。为了同时实现FFT和随机共振算法，选用了FPGA作为协处理器。仪器软件建立在实时操作系统基础上，使系统性能更加稳定。介绍了随机共振仪的软硬件组成，给出了仿真实例，验证了算法在随机共振仪上实现的有效性。
英文摘要：
Stochastic resonance （SR） is a novel signal processing method, which has been applied widely in various areas. Its hardware implementation has important engineering application value. This paper introduces a portable step-changed stochastic resonance instrument. In the instrument, a kind of system on chip is used as CPU and FPGA is used as the co-processor to realize FFT and SR algorithms. The instrument software is built on RTOS （real time operation system） , which makes the instrument more stable. The hardware and software structure of the instrument is introduced and a simulation example is given to prove the validity of the instrument.
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