Sawtooth Modulation
In Frequency-Modulated Continuous Wave (FMCW) Radar, the changing pattern of a sawtooth frequency is basic. This method lets us work easily with signals and accurately measure things like distance to targets or how fast they’re moving. This change in pattern goes up regularly and linearly with the sent signal, then suddenly resets to start again making a wave shape like teeth of saw. FMCW Radar systems often use a sawtooth pattern for frequencies changing. This is important in tasks like measuring range and speed in cars, where accuracy matters. This simple pattern of modulation in FMCW radar tech helps make it work better and more trustworthy.
- Continuous Increase: The sent signal gets stronger slowly with time, giving a reliable pattern of change.
- Reset (Sawtooth Pattern): When it hits a particular level, the change quickly goes back to where it started and forms an up-and-down wave shape. This reset is very important for making the signal processing and analysis easier.
Where:
fD: is the Doppler frequency shift, which is the difference between the frequency of the transmitted signal and the frequency of the received signal. It is caused by the relative motion between the radar and the target.
Delta f: is the frequency difference between the reflected wave and a local oscillator wave. this is used to determine the distance to the target.
Delta t: is the time delay between the transmission of the signal and the reception of the echo. this is used to determine the distance to the target.
In the outline, the x-pivot addresses time, and the y-hub addresses the moment recurrence of the communicated signal. The sawtooth design delineates the ceaseless expansion in recurrence followed by an unexpected reset, rehashing over the long run.
FMCW Radar
In this article, we will be going through FMCW Radar, First we will start our Article with the definition of the FMCW Radar, Then we will go through the Principle Operation of FMCWR with its characteristics, Then we will go through the definition of the Maximum Range and Range Resolution and go through Block diagram of the FMCW Radar. At Last, we will conclude our Article with its Advantages, Disadvantages, Application, and Some FAQs.
Table of Content
- What is Continuous Wave Radar?
- Principle of Operation
- Characteristics
- Modulation Pattern
- Block Diagram
- Imaging FMCW Radar
- Non- Imaging FMCW Radar
- Advantages and Disadvantages
- Applications