Podcast
Questions and Answers
What is the relationship between the input signals I(t) and Q(t) on the quadrature modulator and the output signal s(t)?
What is the relationship between the input signals I(t) and Q(t) on the quadrature modulator and the output signal s(t)?
- s(t) = I(t) * cos(2πfIF t) + Q(t) * sin(2πfIF t)
- s(t) = I(t) + Q(t) * cos(2πfIF t)
- s(t) = I(t) * cos(2πfIF t) - Q(t) * sin(2πfIF t) (correct)
- s(t) = I(t) + Q(t)
What is the advantage of using a quadrature modulator compared to a single D/A converter and lowpass filter?
What is the advantage of using a quadrature modulator compared to a single D/A converter and lowpass filter?
- The quadrature modulator requires less hardware components.
- The quadrature modulator has a lower data conversion time. (correct)
- The quadrature modulator has a higher bandwidth.
- The quadrature modulator requires only one D/A converter and lowpass filter.
What is the drawback of using a quadrature modulator compared to a single D/A converter and lowpass filter?
What is the drawback of using a quadrature modulator compared to a single D/A converter and lowpass filter?
- The quadrature modulator has a lower bandwidth.
- The quadrature modulator has a higher data conversion time.
- The quadrature modulator requires more hardware components. (correct)
- The quadrature modulator requires a more complex signal processing algorithm.
What is the spectrum of the D/A converted signal xs(t)?
What is the spectrum of the D/A converted signal xs(t)?
What is the required cut-off frequency of the lowpass (aliasing) filter?
What is the required cut-off frequency of the lowpass (aliasing) filter?
What is the significance of the parameter ΔT in the context of the digital pulse generation system?
What is the significance of the parameter ΔT in the context of the digital pulse generation system?
What does the impulse response h(t) of the latching filter represent?
What does the impulse response h(t) of the latching filter represent?
What is the transfer function H(f) used for in the given context?
What is the transfer function H(f) used for in the given context?
What is the maximum deformation caused by the sinc-function in a practical D/A converter?
What is the maximum deformation caused by the sinc-function in a practical D/A converter?
In digital pulse coding, how is the quantization step eo calculated?
In digital pulse coding, how is the quantization step eo calculated?
What does the error signal e(n) represent in digital pulse coding?
What does the error signal e(n) represent in digital pulse coding?
What characteristic does the transfer function H(f) describe for a practical D/A converter?
What characteristic does the transfer function H(f) describe for a practical D/A converter?
What is the primary difference between the output signal of a practical D/A-converter and an ideal D/A-converter?
What is the primary difference between the output signal of a practical D/A-converter and an ideal D/A-converter?
What is the effect of the finite number of bits in the binary numbers on the output signal of a practical D/A-converter?
What is the effect of the finite number of bits in the binary numbers on the output signal of a practical D/A-converter?
How can the difference between the output signal of a practical D/A-converter and an ideal D/A-converter be described?
How can the difference between the output signal of a practical D/A-converter and an ideal D/A-converter be described?
What is the mathematical expression for the output signal of a practical D/A-converter?
What is the mathematical expression for the output signal of a practical D/A-converter?
What is the relationship between the convolution in the time domain and the multiplication in the frequency domain for the output signal of a practical D/A-converter?
What is the relationship between the convolution in the time domain and the multiplication in the frequency domain for the output signal of a practical D/A-converter?
What is the purpose of the rectangular pulse $p(t)$ in the expression for the output signal of a practical D/A-converter?
What is the purpose of the rectangular pulse $p(t)$ in the expression for the output signal of a practical D/A-converter?
