(25M) Consider the analog signal x,(t) =3cos(100 a t) + sin(150 t). a) Determine the minimum Fs to avoid aliasing. o) Suppose that x. (1) is sampled at F-200HZ. What is the discrete-time signal after sampling?
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- a) Draw the graph of the NRZ-I, Manchester & differential Manchester using data stream01010101, assuming that the last signal level has been positiveConsider a convolutional code with k = 1, n = 3 and L = 3. The encoder generators aregiven by 91 = [110], 92 = [001] and 93 = [011].Assume the Viterbi algorithm is used for decoding at the receiver and considerthe received bit sequence at the input of the channel decoder being [10 0100110011].Answer the following questions.(a) What is the decoded information bit sequence? (b) What is the value of the cumulative metric (i.e., Hamming distance) of thefinal survivor path of the decoding process?(c) Draw the final survivor path of the trellis for the decoding process.Instruction for Part (c): An example of drawing a path in the trellis is shown below.2.Consider the bit stream 01101101. Draw the waveforms for following line codes.(i)(ii)Biphase Manchester codingBiphase Differential Manchester codingPolar PSEUDOTERNARY(iii)(iv)Multilevel -8B6T(v)Multilevel-2B1Q Assume that the signal level for the most recent preceding 0 bit (pseudoternary) has a negative voltage.
- Draw the graph of the NRZ-L scheme using each of the following data streams,assuming that the last signa11evel has been positive. From the graphs, guess thebandwidth for this scheme using the average number of changes in the signal level.Compare your guess with the corresp.onding entry in Table 4.1.a. 00000000b. 11111111c. 01010101d. 00110011The basic principle of differential coding techniques like Differentil PCM (DPCM) and Adaptive Differential PCM (ADPCM) is to transmit information _____. A. about the changes in sample value B. approximation to the input signal C. using artificial signal D. of the actual sample values themselvesImplement MATLAB program that plots channel capacity vs signal to noise ratio for 2-PSK,4-PSK,8-PSK modulations
- answer with proper explanation and step by step solution. Question: d the x-intercept (s) and y-int ercep f(x)=(4x-7)/(2x^(2)+1)Q3: By means of DTFT and IDTFT, show that the output response of an LTI system h(n) = a"u(n) to the input x(n) = B"u(n), where |a| < 1, |B] < 1, and a # ß is given byQ1 If a signal has a frequency of 30KHZ what is the period in Microseconds?
- Discuss the following outdoor propagation Longley-rice model Okumura model Hata model Explain in detail about types of small-scale fading based on multipath time delay spreadConsider a (127, 92) linear block code capable of triple error corrections.(a)What is the probability of message error for an uncodedblock of 92 bits if the channel symbol error probability is10-3?(b)What is the probability of message error when using the(127, 92) block code if the channel symbol errorprobability is 10-3?#45.! Consider the following bit stream-a. 00000000 b. 11111111 c. 01010101 d. 00110011 Draw the graph of the i. Manchester using each of the given data streams, assuming that the last signal level has been positive. From thegraphs, guess the bandwidth for this scheme using the average number of changes in the signal level... .