Answer Happy

Q1) given the following block diagram: Square multiplier X LPF Determination device Determine: 1. What is the input X and the output Y? (equations) 2. For what purpose this block is used for? 3. What is the modulation type? Why? How many symbols? Bits/symbols? 4. Draw the reverse block diagram that has input Y and output X. What does it used for? Q2) A signal has a symbol rate of 8000 symbols/sec and bit rate 24000 bits/sec. Find: 1. Bits/symbol? 2. Number of symbols? 3. What is the type of modulation (given that amplitude is fixed for all symbols)? Why? 4. How can we increase the efficiency of the system (increase data rate)? Give a suggestion and calculate the symbol and bit rate. 5. How to prohibit the phase transition of 180°? Explain with figure. Q4) design a binary FSK modulator for the following bits: I= (01011) Use carrier frequency Fe = 100K Hz and Af=50 KHz. Plot the modulated signal according to input bits (1), show the frequency for each symbol. Then, answer: 1. How many symbols exist? 2. How many bits/symbol? 3. How much the phase of the modulated signal changes for each symbol?
Guz find: Given 16 PSK modulation. if 1. Constellation Diagram with all symbol combination no of symbols and of bit/symbols 2 no. 3. Ts 4. Rb and Rs ть 1 мг,
Quiz: Compare between 128PSK and 1- Phase shift between adjacent symbols. 2. no. of Symbols. 3. bits/symbol 4. First 5 symbol-bit contination 5. constellation dingram (sketch for first 5 symbols). 16 PSK in terms of :