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Questions and Answers
Which of the following is associated with sampling at Nyquist rate?
At what rate can the signal be reconstructed?
Which of the following is true for uniform and non-uniform quantization?
What is cross talk in digital modulation techniques termed as?
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What can companding be used to improve?
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Study Notes
Sampling and Nyquist Rate
- Nyquist rate refers to sampling a signal at twice its highest frequency to avoid aliasing.
- A signal can be accurately reconstructed from its samples if it is sampled at or above the Nyquist rate.
Signal Reconstruction Rate
- The reconstruction of the signal can occur at the Nyquist frequency, which is equal to twice the maximum frequency component of the signal.
Quantization Types
- Uniform quantization assigns equal intervals for representing signal levels, ensuring consistent resolution across the entire range.
- Non-uniform quantization uses varying interval sizes, allowing for better representation of signal levels that occur more frequently, often resulting in improved signal fidelity.
Cross Talk in Digital Modulation
- Cross talk in digital modulation techniques refers to unwanted signal interference between communication channels, leading to accuracy loss in signal transmission.
Companding Benefits
- Companding can be used to improve the dynamic range and reduce quantization noise in quantized signals by compressing the dynamic range before transmission and expanding it back during reception.
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Description
Test your knowledge of pulse modulation and the digital representation of analog signals in this objective quiz. Topics covered include sampling at the Nyquist rate, the concept of guard bands, and signal reconstruction. Perfect for students of B.Tech. (E.C.E.) in their third or fourth year.
