Which of the following is generally true of Finite Impulse Response (FIR) filters?
The correct answer is A: FIR filters can delay all frequency components of the signal by the same amount. Which of the following is generally true of Finite Impulse Response (FIR) filters is that FIR filters can delay all frequency components of the signal by the same amount. FIR filters have linear phase (constant delay). For amateur radio operators, this is important for digital signal processing. Understanding this helps when working with filters.
Exam Tip
Generally true of FIR filters = can delay all frequency components by same amount. Think 'F'IR = 'F'lat delay (linear phase, constant delay). FIR filters have linear phase (constant delay). Not easier implementation, not faster response - just constant delay for all frequencies.
Memory Aid
"Generally true of FIR filters = can delay all frequency components by same amount. Think 'F'IR = 'C'onstant 'D'elay. FIR filters have linear phase (constant delay). Important for digital signal processing."
Real-World Application
Finite Impulse Response (FIR) filters: A generally true characteristic is that FIR filters can delay all frequency components of the signal by the same amount. This is called linear phase response. This is what's generally true - constant delay for all frequencies.
Key Concepts
Why Other Options Are Wrong
Option B: Incorrect. FIR filters easier to implement isn't generally true - FIR filters can delay all frequencies by same amount. Easier implementation isn't generally true.
Option C: Incorrect. FIR filters responding faster to impulses isn't generally true - FIR filters can delay all frequencies by same amount. Faster response isn't generally true.
Option D: Incorrect. Since B and C are not generally true, 'all of the above' cannot be correct. Only constant delay is generally true.
题目解析
The correct answer is A: FIR filters can delay all frequency components of the signal by the same amount. Which of the following is generally true of Finite Impulse Response (FIR) filters is that FIR filters can delay all frequency components of the signal by the same amount. FIR filters have linear phase (constant delay). For amateur radio operators, this is important for digital signal processing. Understanding this helps when working with filters.
考试技巧
Generally true of FIR filters = can delay all frequency components by same amount. Think 'F'IR = 'F'lat delay (linear phase, constant delay). FIR filters have linear phase (constant delay). Not easier implementation, not faster response - just constant delay for all frequencies.
记忆口诀
Generally true of FIR filters = can delay all frequency components by same amount. Think 'F'IR = 'C'onstant 'D'elay. FIR filters have linear phase (constant delay). Important for digital signal processing.
实际应用示例
Finite Impulse Response (FIR) filters: A generally true characteristic is that FIR filters can delay all frequency components of the signal by the same amount. This is called linear phase response. This is what's generally true - constant delay for all frequencies.
错误选项分析
Option B: Incorrect. FIR filters easier to implement isn't generally true - FIR filters can delay all frequencies by same amount. Easier implementation isn't generally true. Option C: Incorrect. FIR filters responding faster to impulses isn't generally true - FIR filters can delay all frequencies by same amount. Faster response isn't generally true. Option D: Incorrect. Since B and C are not generally true, 'all of the above' cannot be correct. Only constant delay is generally true.
知识点
Generally true, Finite Impulse Response filters, FIR filters, Delay all frequency components, Same amount
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.