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单选题 已知线性移不变系统
,信号
经过该系统,得到的响应
为()
A. 
B. 
C. 
D. 
学科：数字信号处理
时间：2023-12-29 09:47:26
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题目1单选题
给定<img src="https://tihai-oss-cloud.itihey.com/img/2c6d8a99e4fe2cee921183efa33dc054.webp">,<img src="https://tihai-oss-cloud.itihey.com/img/0ee73194f8269d1fc4cc9a0bba06e4a5.webp">,则<img src="https://tihai-oss-cloud.itihey.com/img/666bacf203fceffc773809e879ff63e1.webp">可表示为()A. <img src="https://tihai-oss-cloud.itihey.com/img/c31cc53ed1ac0b63ba4405a37a28b181.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/d6ed991af4285d7dfbb4b8799e9bdd98.webp">C. <img src="https://tihai-oss-cloud.itihey.com/img/4618975a6205b241202de5e93ff6d483.webp">D. <img src="https://tihai-oss-cloud.itihey.com/img/14c24a8a00a3eb90149243a7da042245.webp">
题目2单选题
若某离散系统的单位抽样脉冲响应为:<img src="https://tihai-oss-cloud.itihey.com/img/e1d2ae7eaf5804417b6b0fea1eeb237e.webp">,该系统的差分方程为()A. <img src="https://tihai-oss-cloud.itihey.com/img/ca0cddab7e8863fc29733a8714bc654d.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/92c9055e50125ce61f385a48b4066bc5.webp">C. <img src="https://tihai-oss-cloud.itihey.com/img/406ef14ea2a9838f2cf1f8243cab1ce0.webp">D. <img src="https://tihai-oss-cloud.itihey.com/img/a8f775ce45acc6e54bbda4cabb0b9e08.webp">
题目3单选题
下面理想数字滤波器的幅频特性图中,()为理想数字全通滤波A. <img src="https://tihai-oss-cloud.itihey.com/img/c7b857549624fc46c654160b57125f27.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/1ced96519ccbf227273102e23bd836b4.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/c0c927d12ef8f00bf665c8e9dbf23f48.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/329aea306ec0aaf658ed9afc472ad33a.png">E. <img src="https://tihai-oss-cloud.itihey.com/img/68b1e31d4c582a7f4e1638245ea26235.png">(1分)
题目4单选题
给定<img src="https://tihai-oss-cloud.itihey.com/img/70c3bb9d8d6992879df7101cf284c207.webp">,则<img src="https://tihai-oss-cloud.itihey.com/img/12705610c459453329604ccfa9acb4b0.webp">结果可表示为()A. <img src="https://tihai-oss-cloud.itihey.com/img/9c3b093d74c3ec2dd0109548acee6a30.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/eea2b08ee0c841b21b87d036b9899963.webp">C. <img src="https://tihai-oss-cloud.itihey.com/img/db4fff1a46d93bbb90bb13771c100072.webp">D. <img src="https://tihai-oss-cloud.itihey.com/img/b2bacbb4b07677d3fdb4ae9fc888f90e.webp">
题目5单选题
下图为某IIR滤波器的幅频特性曲线图.要求<img src="https://tihai-oss-cloud.itihey.com/img/042956ff49186d5f8df1b7b925cc952c.webp">频段的频率成分,衰减大于40dB,<img src="https://tihai-oss-cloud.itihey.com/img/4293b7229aff8026aec6a5533aaaf56c.webp">和<img src="https://tihai-oss-cloud.itihey.com/img/cf4fb683d47c8c406576231a5feb9615.webp">以上频段的频率成分,幅度衰减小于1dB.下列描述 不正确 的是( ). <img src="https://tihai-oss-cloud.itihey.com/img/7e1e8585deef4159ada850be5d438d71.webp">A. 设计结果不符合指标要求B. 该滤波器具有带阻滤波器的特性C. 该滤波器可能为椭圆类型滤波器D. 该滤波器通带和阻带范围都具有等波纹特性
题目6单选题
下面离散系统的零、极点分布图中,X表示极点,o表示零点,则具有高通频率特性的是()<img src="https://tihai-oss-cloud.itihey.com/img/769fa31719f7f309d02b52a264d0492c.png">A. 图AB. 图CC. 图BD. 图D
题目7单选题
已知线性移不变系统<img src="https://tihai-oss-cloud.itihey.com/img/3224c254ce2ccac2687e6523b03ef755.webp">,信号<img src="https://tihai-oss-cloud.itihey.com/img/7cee9b097f69ecd357c0a7aa672fc5bb.webp">经过该系统,得到的响应<img src="https://tihai-oss-cloud.itihey.com/img/ad4927db85a2ac1095adb51dd015c613.webp">为()<img src="https://tihai-oss-cloud.itihey.com/img/98230a2479f23c3c049b8100436d0594.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/9e8843317e783624308d158829790414.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/93a42915321229d0cc7f172f1002655e.webp">C. <img src="https://tihai-oss-cloud.itihey.com/img/b74d3f1bd1eae276dd9bdb9e45966d89.webp">D. <img src="https://tihai-oss-cloud.itihey.com/img/242cc0f0cdd9cac2317d934fa807895b.webp">
题目8单选题
若以<img src="https://tihai-oss-cloud.itihey.com/img/c0153ce1e72bc79cd5e496f4205cfa21.webp">抽样频率对某音频信号进行抽样而没有产生频谱混叠失真,则该音频信号的最高频率不会超过()A. 20KHzB. 10KHzC. 5KHzD. 2.5KHz
题目9单选题
已知某模拟信号的频率范围是0~20KHz,以下列采样频率fs抽样,不会产生频谱混叠的是()A. fs=10KHzB. fs=20KHzC. fs=0KHzD. fs=48KHz
题目10单选题
各种相同宽度的窗函数加窗后滤波器性能指标如下表,现要设计一阻带误差不小于60dB,过渡带宽不大于0.1π低通滤波器,则可选用的窗形状和宽度为()<img src="https://tihai-oss-cloud.itihey.com/img/f7caa9d9903a6d5c9c3766aa25149497.png">A. 布莱克曼窗,N≥5.5B. 布莱克曼窗,N≥20C. 布莱克曼窗,N≥110D. 布莱克曼窗,N≤110
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