Frequency Shifting: Difference between revisions
(Created page with "This tutorial describes how to perform frequency shifting, causing the frequency of a signal to change. ==Frequency Shifting== Frequency shifting is the process of changing the position of a signal within the frequency domain. Equivalently, it can be stated that frequency shifting is the process of changing the center frequency of a signal. Frequency shifted can be implemented many different ways, although this tutorial will focus on the simple method of multiplication...") |
No edit summary |
||
| Line 15: | Line 15: | ||
* Low Pass Filter | * Low Pass Filter | ||
* QT GUI Frequency Sink | * QT GUI Frequency Sink | ||
[[File:frequency_shifting_flowgraph.png]] | |||
Revision as of 21:26, 5 April 2024
This tutorial describes how to perform frequency shifting, causing the frequency of a signal to change.
Frequency Shifting
Frequency shifting is the process of changing the position of a signal within the frequency domain. Equivalently, it can be stated that frequency shifting is the process of changing the center frequency of a signal. Frequency shifted can be implemented many different ways, although this tutorial will focus on the simple method of multiplication by a complex sinusoid.
Multiplying a signal by a complex sinusoid with frequency f Hz will translate or shift the center frequency of the signal by f Hz. For example, to frequency shift a signal by 1 MHz a complex signal must be generated with frequency 1 MHz, and then multiplied against the desired signal in order to frequency shift it.
Build Example Signal
First an example signal needs to be built. A simple signal of filtered noise is created. Drag in the following blocks and connect them:
- Noise Source
- Throttle
- Low Pass Filter
- QT GUI Frequency Sink
