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技术术语 Technical Terms in Chapter 1Accumulator 累加器 Additive property 可加性Averaging system 平均系统 Block diagram 方框图Capacitor 电容 Cascade (series) interconnection 级（串）联Complex exponential 复指数Complex numbers 复数 Continuous-time signals 连续时间信号Energy and power 能量和功率Sampling 采样Delay 延迟 Discrete-time signals 离散时间信号 Feedback interconnection 反馈连接 Fundamental frequency 基波频率 Fundamental period 基波周期Harmonic 谐波Independent variable 独立（自）变量 Inverse system 逆系统 Invertible system 可逆系统Linear time-invariant (LTI) 线性时不变 Causal 因果的 Odd signal 奇信号 Parallel interconnection 并联Periodic signal 周期信号 Real exponential signals 实周期信号 Sampling property 采样特性Sinusoidal signal 正弦信号 Stability 稳定性 Unit step function 单位阶跃函数 Technical Terms in Chapter ２ Absolutely summable impulse response 绝对可和脉冲响应 Absolutely integrable impulse response 绝对可积冲激响应 Autocorrelation functions 自相关函数Coefficient multiplier 系数乘法Accociative property 结合律 Communitive property 交换律Distributive property 分配律Convolution integral 卷积积分 Convolution sum 卷积和 Differentiator 微分 Finite impulse response 有限冲激响应 Infinite impulse response 无限冲激响应First difference 一阶差分Forced response 受迫响应 Linear constant-coefficient differential equations 线性常系数微分方程 Block diagram 方框图 Recursive filter 递归滤波器 Series (cascade) interconnection 串联 ( 级联 ) Step response 阶跃响应Unit delay 单位延迟 Sifting property 筛选性质 Unit impulse response 单位脉冲响应 Unit ramp function 单位斜坡函数 Walsh function 沃尔什函数 Wavelength 波长 Zero-input response 零输入响应 Technical Terms in Chapter 3 Accumulator property 积累特性 Aperiodic convolution 非周期卷积 Frequency shaping filter 频率成型滤波器Bandpass filters 带通滤波器 Commutative property 交换律 LTI system response LTI 系统响应 Conjugate property 共轭特性 Discrete-time Fourier series 离散傅里叶级数 Continuous-time Fourier series 连续傅里叶级数 Cutoff frequency 截止频率 Unit delay 单位延迟 Difference equation 差分方程 First order recursive difference equation 一阶递归差分方程Linear constant coefficient 线性常系数 Differential equation 微分方程 Highpass filter 高通滤波器 Lowpass filter 低通滤波器Differentiator 微分器 Discrete-time signals 离散时间信号Distribution th