a. Draw the constellation diagram of Grey coded 16-QAM using nearest neighbor approximation with all the decision boundaries.
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- 3. Some GPS receivers use 1 bit ADCS (Analog-to-digital Converters) to sample and quantize the signal i.e. the output of the ADC is simply 2 quantization levels: -1 or +1. This is typically done to save on power. (a) What is the quantization SNR? How does it compare to typical thermal noise SNR of a GPS signal before correlating with the CDMA code? (b) Justify, how come it is possible to sample the signal using a single bit and still get good performance.Prepare and fill in the karnaugh map of the bole algebra function in the photo. (do not download)Design a 3x8 decoder by using 1x2 DEMUXE..
- 2. Draw the Block Diagram, List the truth table and write the Bolan function to: a) Half Subtractor 6) Encoder: 4-to-2 ......... ...See the figure below for Manchester scheme on CH-1 of Scope. Write the corresponding input bit stream. DE2.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?
- Two M-QAM modulation schemes, 16-QAM and 64-QAM, having equal error performance (I.e same value of Pbe). SNR-13 dB 16-QAM system. Calculate the E/N, in 64-QAM system. Compare the results. What are the maximum transmission rate (free from ISI problem) in both modulation schemes? Assume B=20 kHz.Design a Moore-type circuit for the pattern recognizer described above using D-flipflop. Show the following: a.)K-maps and equations b.)Corresponding circuits of the solved equations.Q24)This multiple choice question from DIGITAL COMMUNICATIONS course.just write for me the final answer. The choice of the number of bits per PCM word depends on the a. SNR b. Bandwidth c. None of the mentioned d. SNR and bandwidth
- III. Theory/ Discussion 1) Arduino IDE consists of 2 functions. What are they? a) else () and loop () b) Setup () and build () c) Setup () and loop () d) Setup () and elseif () 2) When forward biased, LED emits light because of Recombination of carriers and Light produced by collisions. 3) ATmega328p microprocessor is used in arduino UNO. (TRUE/FALSE) (TRUE/FALSE) IV. Circuit Diagram (Before Simulation) Draw the circuit and write the program codes by considering input pin as A2 and output and output pin as 9 for green, 10 for yellow LED & 11 for red LED. Also verify the results if (gas >= 100) red LED should glow, if (gas >= 60) yellow LED should glow, otherwise green LED should glow. V. Connection Diagram and Results after simulation hpTwo M-QAM modulation schemes, 16-QAM and 64-QAM, having equal error performance (i.e same value of Pbe). SNR=10 dB in 16-QAM system. (a) Calculate the Eb/No in 64-QAM system. Compare the results. (b) What are the maximum transmission rate (free from ISI problem) in both modulation schemes? Assume B=20 kHz.d. MTN AMPS (advanced mobile phone system) cellular operator is allocated a frequency of 12.5 MHz for each simplex band, and if Band-guard is taken to be 10 KHz, and Bc is 30 kHz, compute the number of channels existing in an FDMA system. Also find the new allocated frequency if the computed number of channels was increased by 20%.