2. (10pts) Suppose the binary bit stream "10110101" is sent using w/4-DQPSK, with the left most bits applied to the transmitter first. The two QPSK constellations are shown in Fig. 2. The bit mapping is given in Table 1. Assume using Fig. 2(a) as the starting QPSK constellation. Assuming that Oo-0. i) Determine the carrier phase 0, the in-phase component / and the quadrature component Qk, for the input sequence. ii) Specify in sequence the constellation symbols used to transmit the input sequence (specify which QPSK constellation, e.g. for r₁ in (a), write (a)). 32 "01" "00" 23 "11" "10" @ "01" Figure 2: Problem 2 (mik, mok) 00 01 /4 3/4 TA 11 10 Table 1: 5л/4 7/4 "00" (b) "10"

2. (10pts) Suppose the binary bit stream "10110101" is sent using w/4-DQPSK, with the left most bits applied to the transmitter first. The two QPSK constellations are shown in Fig. 2. The bit mapping is given in Table 1. Assume using Fig. 2(a) as the starting QPSK constellation. Assuming that Oo-0. i) Determine the carrier phase 0, the in-phase component / and the quadrature component Qk, for the input sequence. ii) Specify in sequence the constellation symbols used to transmit the input sequence (specify which QPSK constellation, e.g. for r₁ in (a), write (a)). 32 "01" "00" 23 "11" "10" @ "01" Figure 2: Problem 2 (mik, mok) 00 01 /4 3/4 TA 11 10 Table 1: 5л/4 7/4 "00" (b) "10"

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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A. Binary sequence is 101011 Unit pulse amplitude, binary data rate Rb=1Kbps. Sketch waveforms in 1. Unipolar nrz 2. Polar nrz 3. Unipolar rz 4. Bipolar rz 5. Manchester B. Also find and sketch psd corresponding to above line codes. With Rb=1Kbps. Let f1>0 be location of 1st spectral null in psd function. If transmission bandwidth BT of a line code is determined by f1. Determine the line codes in A. as a function of Rb(for all parts)
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For the picture attached below the parameters are the following: f1 = 400 Hz m(t) = sin(2 fmt), where fm = 300 Hz. Assume ideal LPFs with a cut-o frequency of f1. What would be the value of frequency f2 be so that the carrier frequency is 2.5kHz? What modification of this system is required to generate USSB (at the same carrier frequency)? ( Note: this does not involbe changing the oscillator frequencies)
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Please solve the question and explain fully. Thanks.
The telemetry system of a geostationary communications satellite samples 150 sensors on the spacecraft in sequence. Each sample is transmitted to earth as 10 eight-bit words in a TDM frame. An additional 200 bits are added to the frame for synchronization and status information. The data are then transmitted at a rate of 2.0 kilobit per second using binary phase shift keying (BPSK) modulation of a low power carrier. a. How long does it take to send a complete set of samples to earth from the satellite? b. Including the propagation delay, what is the longest time the earth station operator must wait between a change in a parameter occurring at the spacecraft and the new value of that parameter being received via the telemetry link? (Assume a path length of 37 000 km.)
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A. How many numbers of constellation points exist in phase for 3bit ASK? B. What happens to the radio wave propagation when the frequency is below critical angle? C. If the mark frequency and space frequency are same then what happens to FSK? D. What is the Carson’s rule? E. What is the Maximum data rate in a minimum channel bandwidth is ? F. What is radio horizon and where is it used? G. What are the phase angle limitations of a BPSK? H. What is the change in channel capacity when two number of bits are increased?
I need an expert to choose the correct answer and provide proof with a drawing or a law or something from a reliable source. 1. In AM, 50% modulation indicates that ,33.3%,11.1%). of the total transmitted power is in the sidebands (0%,50% 2. To obtain coherent detection in AM receiver, an extra signal is added to the modulated signal, this signal (PLL, IF carrier, pilot carrier, subcarrier). called 3. The output spectrum of a modulator includes upper-side, lower-side frequencies, and the carrier frequency. (balanced, standard amplitude, SSB, none of the above) 4. When a signal is multiplied by the unit step function, (the positive time range is suppressed, the negative frequency range is suppressed, the negative time range is suppressed, the positive frequency range is suppressed). 5. DSB-LC requires coherent detection at the receiver, if the type of modulation is modulation, over modulation, critical modulation, none of them). 6. A continuous FT indicates a 7. In VSB transmission…