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Question
If \(\displaystyle m= \frac{\gamma\cdot\max|s(t)|}{A} \leq 1\), then a simple demodulation of the received antenna signal \(r_{HF}(t)\) can be achieved by the following circuit: [Answer Circuit Diagram and Description of each components]
Answer
- | · |: First the negative signal values of \(r_{HF}(t)\) are turned into positive values by the modulus operation | · |, which can be carried out by a diode;
- LPF: The resultant signal is then smoothened by an appropriate low pass filter (LPF) upon averaging the carrier-frequency oscillations; this is referred to as an envelope detector.
- Offset Removal: After the DC offset (zero freq. component) is removed, we have \(r(t)\), which is the estimate of the transmitted baseband signal.
- LPF: The resultant signal is then smoothened by an appropriate low pass filter (LPF) upon averaging the carrier-frequency oscillations; this is referred to as an envelope detector.
- Offset Removal: After the DC offset (zero freq. component) is removed, we have \(r(t)\), which is the estimate of the transmitted baseband signal.
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#has-images
Question
If \(\displaystyle m= \frac{\gamma\cdot\max|s(t)|}{A} \leq 1\), then a simple demodulation of the received antenna signal \(r_{HF}(t)\) can be achieved by the following circuit: [Answer Circuit Diagram and Description of each components]
Answer
?
Tags
#has-images
Question
If \(\displaystyle m= \frac{\gamma\cdot\max|s(t)|}{A} \leq 1\), then a simple demodulation of the received antenna signal \(r_{HF}(t)\) can be achieved by the following circuit: [Answer Circuit Diagram and Description of each components]
Answer
- | · |: First the negative signal values of \(r_{HF}(t)\) are turned into positive values by the modulus operation | · |, which can be carried out by a diode;
- LPF: The resultant signal is then smoothened by an appropriate low pass filter (LPF) upon averaging the carrier-frequency oscillations; this is referred to as an envelope detector.
- Offset Removal: After the DC offset (zero freq. component) is removed, we have \(r(t)\), which is the estimate of the transmitted baseband signal.
- LPF: The resultant signal is then smoothened by an appropriate low pass filter (LPF) upon averaging the carrier-frequency oscillations; this is referred to as an envelope detector.
- Offset Removal: After the DC offset (zero freq. component) is removed, we have \(r(t)\), which is the estimate of the transmitted baseband signal.
Summary
| status | not learned | measured difficulty | 37% [default] | last interval [days] | |||
|---|---|---|---|---|---|---|---|
| repetition number in this series | 0 | memorised on | scheduled repetition | ||||
| scheduled repetition interval | last repetition or drill |
Details
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