are specifications of Digital modulation techniques?

Q5/ The information in an analog waveform with maximum frequency fm transmitted over M-level PCM system where the number of quantization levels is M = 16. The quantization distortion is specified not to exceed 1% of peak-to-peak analog signal. = 3 KHz is to be i) What would be the maximum number of bits per sample that should be used in this PCM system? (ans,n = 4 bits) What is the minimum sampling rate and what is the resulting bit transmission rate? ii) (ans.r > 24 x 103 bits/sec)

What do you mean by fractional sampling rate conversion? Explain with an example of converting 48 kHz signal to 44.1 kHz signal using multi-stage fractional sampling rate converter. (ii) What are the effects of finite word length in digital filters

Please describe as simply as possible in detail, what a multiplexer circuit is, how it works. Please also provide as many examples as possible.

Implement the function F(A, B, C) Em(0.1.3.5.6.7) using a 4-way multiplexer Select one: 1

6-24 For a single-tone modulating signal of 5 kHz and a carrier frequency of 600 kHz, list the frequencies appearing in the spectra of the following modulated signals: (a) DSB, (b) conventional AM, (c) SSB-LSB, and (d) SSB-USB.

Describe the principles of modulation and demodulation in the context of transmitting digital data over analog transmission media.

1. a) An analog signal contains frequencies up to 12 kHz. (i) What range of sampling frequencies dose allow exact reconstruction of this signal from its samples? (ii) Suppose that we sample this signal with a sampling frequency Fs = 9 kHz. Examine with proper diagram what happens to the frequency component F1 = 6 kHz after passing through the digital to analog converter. (iii) Repeat part (ii) for a frequency component F2 = 11 kHz. b) Why is it necessary to introduce an analog low-pass filter before analog to digital converter? Illustrate the fact with necessary diagram.

Which statement describe a digital signal? a. is a smoothly and continuously varying voltage or current. b. will take on finite set of voltage levels. c. take on all possible values of amplitude. d. can have an infinite number of values in a range

Q1. A PCM encoder using A-law has a dynamic range of +2 V. Determine the code word when the input signal is (a) -120 mV, (b) 0.5 V, (c) -1.5 V, (d) 1.8 V. determine the input signal value if the code word is (a) 0110 1001, and (b) 1001 1011.