Homework 15Due: Fri Dec 11 2015
0 points: A digital device uses a (2-level) NRZ encoding and transmits with a bandwidth of 120 MHz. Assuming there is no overhead for synchronization, what is the achievable bit rate? Use .5 for an average value of c.
100 points: A digital device uses a (2-level) NRZ encoding and transmits with a signal rate of 70 Mbaud. Assuming there is no overhead for synchronization, what is the achievable bit rate? Use .5 for an average value of c.
0 points: A digital device uses a (3-level) RZ encoding and transmits with a bandwidth of 120 MHz. What is the achievable bit rate? (c is a constant 1 for RZ.)
100 points: A digital device uses a (3-level) RZ encoding and transmits with a signal rate of 70 Mbaud. What is the achievable bit rate? (c is a constant 1 for RZ.)
0 points: A digital device uses a (2-level) Manchester encoding and transmits with a bandwidth of 120 MHz. What is the achievable bit rate? Use .75 for an average value of c.
100 points: A digital device uses a (2-level) Manchester and transmits with a signal rate of 70 Mbaud. What is the achievable bit rate? Use .75 for an average value of c.
0 points: A digital signal is being encoded using 3-level Alternate Mark Inversion (AMI). If the first bit is encoded using a positive voltage, what is the encoding for the bit string 10110001? Use the symbols 0, +, and - to describe the encoding.
100 points: A digital signal is being encoded using 3-level AMI. If the first bit is encoded using a negative voltage, what is the encoding for the bit string 11010101? Use the symbols 0, +, and - to describe the encoding.
100 points: Why isn't there a multi-level scheme known as 4B1Q?
0 points: What is the rate ratio, r, for the multilevel scheme 6B4T?
100 points: What is the rate ratio, r, for the multilevel scheme 6B3Q?
0 points: How many extra signal patterns go unused in the multilevel scheme 6B4T?
100 points: How many extra signal patterns go unused in the multilevel scheme 6B3Q?
Total Points: 700