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Consider, your ID = AB-CDEFG-H. If the digits of your ID form 00 in any case, then use 10. Note: Copied/identical submissions will be

Consider, your ID = AB-CDEFG-H. If the digits of your ID form 00 in any case, then use 10. Note: Copied/identical submissions will be graded as 0 for all parties concerned. 1. (a) The following signal is carrying data in which data elements are encoded as signal elements. What is the value of r? If the bit rate is CE kbps, what is the average value of the baud rate if c is assumed to vary between 0 and 1? [2+31 -1011- -0010- Fig.1 (b) An ethernet cable performs properly above an SNRB above 27. What is the minimum number of bits per sample? What is the data rate through the cable if digital signal to be sent has been sampled at that number of bits per sample and the sampling frequency is 50kHz? [2+3] 2. A communication channel has a signal power S = AD x 5 milliwatts with an average noise power, N =H milliwatts. The channel's transmission medium has a bandwidth of C MHz, [3+3+4] (a) What is the channel capacity? (b) Calculate the Nyquist data rate given the same bandwidth as part (a) and assume 16 signal levels. (c) Compare the theoretical Nyquist data rate in (b) with the practical channel capacity and comment if it is possible to get the Nyquist rate for this channel. If not, assume you are using 80% of capacity as the data rate and calculate the number of levels you should use instead of 16 (bandwidth is the same). 3. For data transmission over a link, show the line coding for BD where each digit is expressed with a bit pattern of 4 bits (for example, 12 would be a stream of 0001 0010) [2x4+2] a) NRZ-I b) Manchester c) Differential Manchester d) 2B1Q Also choose the best coding scheme among the above if the requirements are a) There must be no DC component b) Synchronization problem must be solved c) The presence of inversion or lack of inversion of the voltage should determine the value of the bit.

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