海豚等动物神经系统处理多普勒信号的一种可能性方案  

A possible way for dolphin and other animals to handle Doppler signals

作　　者：张宏[1] 方路平[2] 童勤业[1] 

机构地区：[1]浙江大学生物医学工程系 [2]浙江大学神经信息学中心,杭州310027

出　　处：《物理学报》2007年第12期7339-7345,共7页Acta Physica Sinica

基　　金：国家重点基础研究发展规划(批准号:5132103ZZT21B);国家重大基础研究专项基金(批准号:2002CCA01800);国家自然科学基金(批准号:30170267)资助的课题.~~

摘　　要：海豚、蝙蝠等动物具有功能强大的生物声纳,生物神经系统处理多普勒效应的网络结构可能会有多种形式.对这类生物的神经系统信号处理机制及结构的研究,将能为信息处理提供新的视角.根据序空间神经编码理论,构建了一个生物神经回路处理多普勒信号.经计算机仿真可知,该生物神经网络运算速度快、分辨率高,并能处理任意的连续变频率多普勒信号.所研究的仅由1—2个神经元组成的网络结构是最简单的,由于网络只有一级神经元的延时,保证了处理的快速性,在神经元输出10个脉冲的情况下分辨率可达7-10.Animals such as dolphin and bat feature powerful biological sonar structure. The research on the mechanism and principle of signal processing performed by neural system will provide a novel viewpoint for signal processing. In this paper, a biological neural loop is established to handle Doppler signal based on neural coding theory of ordered space. From simulation, the system loop achieves fast operation and high resolution. Furthermore, Doppler signals of continuously-changing frequency can be properly coped with as well. The network structure for handling Doppler signals may take many forms. However, the structure proposed in the paper is possibly the simplest one, for it comprises only one or two neuron（s）, ensuring rapid processing and high resolution.

关 键 词：多普勒效应 海豚 神经编码 神经脉冲序列 

分 类 号：Q42[生物学—神经生物学]