What is "Nyquist's theorem," and how does it relate to the maximum data rate achievable in a communication channel
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What is "Nyquist's theorem," and how does it relate to the maximum data rate achievable in a communication channel?
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- Explain the application of DSP in communication. *The question from a communication engineering.Assume that a voice channel occupies a bandwidth of 4 kHz. We need to combine three voice channels into a link with a bandwidth of 12 kHz, from 20 to 32 kHz. Show the configuration, using the frequency domain. Assume there are no guard bands in computer communication and network?To create a Pseudo Noise code of length 15 bits, how many shift registers are required? Techniques used in Wideband Modulation are: 1. Direct Sequence Spread Spectrum 2. Orthogonal frequency Division Multiplexing 3. 1 & 2 4. Frequency Hopping 5. 1, 2, &3
- What is the probability of error with a PSK system with a bit rate of 20kpbs, BW of 50 kHz, Noise power of 10-13 W, Carrier Power of 3.3-14 Joules?2.Why do the absolute angular encoders utilize Gray code for encoding the angle? What would be the angular error in the encoder with an 8-bit Gray code?What is the worst-case value for the bit error probability for any digital communication system? Use the decimal form.
- Why SSB is preferred for transmission of good quality signal1/ A 4 MHz analog signal is to be converted to a binary signal (PCM). If the signal to peak quantization noise ratio should be at least 30 dB: a/ What is the size of the code word? b/ What is the system rate in bits per second if sampled at the Nyquist rate?Discuss the key technical specifications of fiber optic cables and their advantages over traditional copper cables in high-speed data transmission.
- Discuss how the original signal can be recovered perfectly from the output of the decoder. What are the advantages of PCM system over the other types of modulation systems?If you are concerned about sampling frequency and bit numbers for your data, which should you be more concerned about? In other words which will impact the replication of your signal more?In PCM, assuming uniform quantization, what is the signal to noise ratio in dB for 12-bit code word?