Digital vs. Analog Signals: Flexibility, Development, Accuracy, Storage, Error Handling - , Assignments of Electrical and Electronics Engineering

Download Digital vs. Analog Signals: Flexibility, Development, Accuracy, Storage, Error Handling - and more Assignments Electrical and Electronics Engineering in PDF only on Docsity! Solutions CH9 EE100-03 Problem 1: “A signal can be thought of formally as a function of one or more variables that convey information. So, basically any transmission, be it light, sound, electrical impulses, or electromagnetic radiation can be considered a signal as long as it contains information that can be extracted in some way.” Problem 3: An analog signal will have a data point for any fractional time value between 0 and 1 second. On the other hand, if we have a discrete-time signal, the number of data points will be dependent on the resolution of the signal and will always be less than infinity. So, a discrete-time signal divides the time variable up into a series of discrete points at which the amplitude is known. -20 -15 -10 -5 0 5 10 15 20 -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1 -20 -15 -10 -5 0 5 10 15 20 -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1 DiscreteAnalog Problem 7: Flexibility: As we noted earlier, an analog device, once developed, is fixed. In other words, it cannot be changed or improved without changing circuit boards. A digital system, on the other hand, can be changed simply by modifying the programming of the device. For example, if you have ever upgraded the “firmware” on an electronic product (digital camera, CD or DVD drive, or network switch for example), you have changed the programming of the microprocessor. The flexibility of digital signal processing devices is probably best illustrated by the computer. Based on the program that is running, a computer can do numerous things that involve processing signals from input and sending signals to output devices in a wide variety of ways. Compare this to your television set. It receives a television signal and decodes it to output the resulting signals to the screen and speakers. It can’t be easily reconfigured to do anything else. Ease of Development: While analog systems must be developed as electrical circuits, digital signal processing can be developed as computer software and later moved to a dedicated microprocessor system. Thus, development and testing of a digital signal processor is easier and more cost-effective than the equivalent processes for an analog signal processor.