Experimento Performance of Different Modulation types Obiective: Compare the performance of the different modulation schemes(ASK-FSK PSK). Theoretical Background: (1) ASK has many cases, but the case we are interested in here is the special case which is called OOK. (2) PSK has many cases, but the case we are interested in here is the special case which is called PRK. (3) FSK has many cases, but the case we are interested in here is the special case which is called orthogonal-FSK, in which the 2 transmitted bits are sent on 2 orthogonal carriers. Procedure: (4) Simulation parameters: a. Number of bits/SNR=1e6bits b. Signal to noise ratio range=0 to 30 dB with 2 dB steps. (5) Generate random binary data vector (you can make use of randint or randi ). (6) Modulate the signal according to the type of modulation you want, ex : OOK: No change in the bits will be required PRK: You will have to represent the 1 by 1 and the O bit by -1 (i.e you can use this formula: 2*vector_bits-1) FSK: You will have to modulate the first bit of the bit stream on a certain carrier and the other biton a carrier orthogonal on it and so on (it can be done by matlab as: if bit to send=O send 1 else sendi, where i:is the complex number) (7) Apply noise to bits(or symbols in case of FSK) (Hint: you must calculate the signal power in this case because it is not unity) Rx_sequence=bits+noise. Or Rx_sequence=awgn (bits, snr,' measured') (8) Decide whether the Rx_sequence is 'l' or 'O (Hint: try to use relational operators and indexing to make the code more efficient) (9) Compare the original bits with the detected bits and calculate number of errors (you can make Activate Go to Setti use of xor orbiterr ). (10) Save the probability of error of each SNR in matrix, BER BER= [BER new prob. of error] (11) Plot the BER curve against SNR (use semilogy) Report requirement: (1) Well commented M-file. (2) Softcopy report containing required figures (BERfigure for all 3 types of modulation on the same figure). (3) Which type of modulation has the best performance? Why? (4) At which value of SNR the system is nearly without error (for each type of modulation)? (5) Evaluate the same curves using the MATLAB built-in function modem.pskmod, modem.pammod ....... (6) Evaluate the probability of error of the 160AM modulation