| Line 4: | Line 4: | ||
Q: What is ECE 438 about? | Q: What is ECE 438 about? | ||
| + | |||
A: Digital signals and systems. | A: Digital signals and systems. | ||
Q: What is a digital signal? | Q: What is a digital signal? | ||
| + | |||
A: A signal that can be represented by a sequence of 0's and 1's. | A: A signal that can be represented by a sequence of 0's and 1's. | ||
The signal must be discrete time (D.T.): x[n], n e Z | The signal must be discrete time (D.T.): x[n], n e Z | ||
| Line 13: | Line 15: | ||
x[n] e {0,1,2,3,...,255} (grayscale values) | x[n] e {0,1,2,3,...,255} (grayscale values) | ||
| − | The | + | The Digital System |
digital signal -> system -> digital signal | digital signal -> system -> digital signal | ||
Three main types | Three main types | ||
| − | Software (MATLAB, C | + | # Software (MATLAB, C program) |
| − | Firmware | + | # Firmware |
| − | Hardware | + | # Hardware |
| − | Advantages of | + | Advantages of Digital Signals & Systems |
Digital Systems are: | Digital Systems are: | ||
| − | + | *Precise | |
| − | + | *Reproducible | |
| − | + | *Easy to build | |
| − | + | *Adaptable | |
| − | + | *Easy to upgrade/fix | |
| − | + | *Can be saved on a bistable storage device | |
x(t) CT World -------------------> x[n] DT World | x(t) CT World -------------------> x[n] DT World | ||
| − | + | ||
| − | + | The Continuous Time (C.T.) World | |
| − | + | *Most natural signals live here | |
| + | *Things are intuitive | ||
| + | *Easy Math | ||
| + | |||
| + | The Discrete Time (D.T.) World | ||
| + | *Digital lives here, along with computers, MATLAB, and digital circuits. | ||
[[ ECE438 (BoutinFall2009)|Back to ECE438 (BoutinFall2009)]] | [[ ECE438 (BoutinFall2009)|Back to ECE438 (BoutinFall2009)]] | ||
Revision as of 10:00, 21 September 2009
under construction
Q: What is ECE 438 about?
A: Digital signals and systems.
Q: What is a digital signal?
A: A signal that can be represented by a sequence of 0's and 1's. The signal must be discrete time (D.T.): x[n], n e Z The signal values must come from a discrete and finite signal. e.g. x[n] e {0,1}
x[n] e {0,1,2,3,...,255} (grayscale values)
The Digital System
digital signal -> system -> digital signal
Three main types
- Software (MATLAB, C program)
- Firmware
- Hardware
Advantages of Digital Signals & Systems Digital Systems are:
- Precise
- Reproducible
- Easy to build
- Adaptable
- Easy to upgrade/fix
- Can be saved on a bistable storage device
x(t) CT World -------------------> x[n] DT World
The Continuous Time (C.T.) World
- Most natural signals live here
- Things are intuitive
- Easy Math
The Discrete Time (D.T.) World
- Digital lives here, along with computers, MATLAB, and digital circuits.
