What kind of digital signal processing audio filter is used to remove unwanted noise from a received SSB signal?
The correct answer is A: An adaptive filter. What kind of digital signal processing audio filter is used to remove unwanted noise from a received SSB signal is an adaptive filter. Adaptive filters adjust to reduce noise. For amateur radio operators, this is important for DSP. Understanding this helps when working with SDRs.
Exam Tip
DSP audio filter to remove noise from SSB = adaptive filter. Think 'A'daptive 'F'ilter = 'A'djusts to 'F'ilter noise. Adaptive filters adjust to reduce noise. Not crystal-lattice (analog), not Hilbert-transform (SSB generation), not phase-inverting - just adaptive filter.
Memory Aid
"DSP audio filter to remove noise from SSB = adaptive filter. Think 'A'daptive 'F'ilter = 'N'oise removal. Adaptive filters adjust to reduce noise. Important for DSP."
Real-World Application
A digital signal processing audio filter to remove unwanted noise from a received SSB signal: An adaptive filter is used. Adaptive filters adjust their characteristics to minimize noise. This is the filter - adaptive filter for noise removal.
Key Concepts
Why Other Options Are Wrong
Option B (Crystal-lattice filter): Incorrect. Crystal-lattice filter isn't DSP - adaptive filter is DSP for noise removal. Crystal-lattice isn't DSP.
Option C (Hilbert-transform filter): Incorrect. Hilbert-transform filter is for SSB generation, not noise removal - adaptive filter removes noise. Hilbert-transform isn't for noise removal.
Option D (Phase-inverting filter): Incorrect. Phase-inverting filter isn't for noise removal - adaptive filter removes noise. Phase-inverting isn't for noise removal.
题目解析
The correct answer is A: An adaptive filter. What kind of digital signal processing audio filter is used to remove unwanted noise from a received SSB signal is an adaptive filter. Adaptive filters adjust to reduce noise. For amateur radio operators, this is important for DSP. Understanding this helps when working with SDRs.
考试技巧
DSP audio filter to remove noise from SSB = adaptive filter. Think 'A'daptive 'F'ilter = 'A'djusts to 'F'ilter noise. Adaptive filters adjust to reduce noise. Not crystal-lattice (analog), not Hilbert-transform (SSB generation), not phase-inverting - just adaptive filter.
记忆口诀
DSP audio filter to remove noise from SSB = adaptive filter. Think 'A'daptive 'F'ilter = 'N'oise removal. Adaptive filters adjust to reduce noise. Important for DSP.
实际应用示例
A digital signal processing audio filter to remove unwanted noise from a received SSB signal: An adaptive filter is used. Adaptive filters adjust their characteristics to minimize noise. This is the filter - adaptive filter for noise removal.
错误选项分析
Option B (Crystal-lattice filter): Incorrect. Crystal-lattice filter isn't DSP - adaptive filter is DSP for noise removal. Crystal-lattice isn't DSP. Option C (Hilbert-transform filter): Incorrect. Hilbert-transform filter is for SSB generation, not noise removal - adaptive filter removes noise. Hilbert-transform isn't for noise removal. Option D (Phase-inverting filter): Incorrect. Phase-inverting filter isn't for noise removal - adaptive filter removes noise. Phase-inverting isn't for noise removal.
知识点
Digital signal processing audio filter, Remove unwanted noise, Received SSB signal, Adaptive filter
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.