[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fGukRmAwQjKksNxIClPUGgYS6ixXaNQ6TtcM5zC0hgho":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":8,"question":15,"related":16,"source":20,"type":21},[],"2024-01-13 18:08:57",130915155,[],{"count":9,"courseId":10,"courseImg":11,"courseName":12,"workId":13,"workName":14},20,"a104bc10a4b0db4c9497047e0add6213","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F91606f9768d5808a7bda837639dadf26.jpg","数字信号处理","work_31067548","第7章 主观题","如下图所示的两个系统,单位脉冲响应h(n),哪一个系统可以实现线性相位滤波器?请说明原因.若为线性相位滤波器,画出其相应的相位特性曲线,并指出时延时多少? \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fee8e8f87882eae9b35f66c3f7ac4b7e9.png\"> \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb4a7e5dc2dad10047c496137262aba16.png\">",[17,22,27,33,39,44,49,54,60,65],{"answer":18,"createTime":5,"id":6,"options":19,"question":15,"source":20,"type":21},[],[],"v1",7,{"answer":23,"createTime":5,"id":24,"options":25,"question":26,"source":20,"type":21},[],130915158,[],"设有一FIR数字滤波器,其单位冲激响应h(n)如下图所示: \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe51d307c076b616a4c1266968bd40a08.png\"> 试求: (1)该系统的频率响应\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fde85c0ae445fc1d9655f0b171f3f044e.png\">; (2)如果记\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9dfa0bd6df854306d7c31cf26ff53e84.png\">,其中,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fecede516aeb2c0d51a6f89db07b1f756.png\">为幅度函数(可以取负值),\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F88d30259c8c3109ce6e56242381ec5bd.png\">为相位函数,试求\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb63850e72a2fb107534659ed9cf27786.png\">与\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F88d30259c8c3109ce6e56242381ec5bd.png\">; (3)判断该线性相位FIR系统是何种类型的数字滤波器?(低通、高通、带通、带阻),说明你的判断依据. (4)画出该FIR系统的线性相位型结构流图",{"answer":28,"createTime":29,"id":30,"options":31,"question":32,"source":20,"type":21},[],"2024-01-13 18:08:58",130915165,[],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe4ed3f9cbb3bba421428ae5007dd7b04.png\">",{"answer":34,"createTime":29,"id":35,"options":36,"question":37,"source":20,"type":38},[],130915167,[],"已知第一类线性相位FIR滤波器的单位脉冲响应长度为16,其16个频域幅度采样值中的前9个为:H(0)=12,H(1)=8.34,H(2)=3.79,H(3)~H(8)=0.根据第一类线性相位FIR滤波器幅度特性H(ω)的特点,求其余7个频域幅度采样值",4,{"answer":40,"createTime":29,"id":41,"options":42,"question":43,"source":20,"type":38},[],130915168,[],"已知FIR滤波器的系统函数为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F16e87430a84fb8d8650c7fac15464da5.webp\">,求出该滤波器的单位脉冲响应\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffc9a513a01d9bfe8a96b857be1c0dfd9.webp\">,判断是否具有线性相位",{"answer":45,"createTime":29,"id":46,"options":47,"question":48,"source":20,"type":38},[],130915170,[],"如果需要设计FIR低通数字滤波器,其性能要求如下: (1)阻带的衰减大于35dB,(2)主瓣宽度小于p\u002F6.请选择满足上述条件的窗函数,并确定滤波器h(n)最小长度N\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2434054be39694ca8e1aa5063113e414.png\">",{"answer":50,"createTime":29,"id":51,"options":52,"question":53,"source":20,"type":38},[],130915171,[],"已知一个线性相位FIR系统有零点\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa3028443ef5e2d49464c411117842249.webp\">,请问,系统稳定吗?该系统还有其他零点吗?如果有,请写出",{"answer":55,"createTime":29,"id":56,"options":57,"question":58,"source":20,"type":59},[],130915175,[],"FIR数字滤波器的设计方法有:_________法、__________法、最优化方法",2,{"answer":61,"createTime":29,"id":62,"options":63,"question":64,"source":20,"type":59},[],130915178,[],"用频率抽样法设计数字滤波器时,增大取样点数N能使频率响应\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1066e304a61f6e1f41fda0f26689f56c.webp\">在更多的点上更精确地逼近目标\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Feacf9eba577635ea6c67a1a4ebb379c4.webp\">,并时滤波器过渡带_______,过渡带附近的频响波动_______",{"answer":66,"createTime":29,"id":67,"options":68,"question":69,"source":20,"type":59},[],130915183,[],"窗函数法设计滤波器的过渡带带宽主要受窗函数DTFT的____(主瓣、旁瓣)影响"]