Howtosignalprocessing
- What is chirp spread spectrum modulation?
- Which of the following modulation techniques spreads a signal over a larger frequency band?
- What is spread spectrum in data communication?
- How does CSS modulation work?
What is chirp spread spectrum modulation?
Chirp, or Chirp Spread Spectrum (CSS), is a long-range radio-frequency technology for wireless communication that can be leveraged to detect and track the location of people, assets, and devices both in and outdoors, across large-scale facilities.
Which of the following modulation techniques spreads a signal over a larger frequency band?
Spreading operation spreads the signal energy over a wider frequency bandwidth. Spread-spectrum modulation is applied on top of a conventional modulation such as BPSK or direct conversion.
What is spread spectrum in data communication?
Spread Spectrum refers to a system originally developed for military applications, to provide secure communications by spreading the signal over a large frequency band. Figure 1 represents a narrow band signal in the frequency domain. These narrowband signals are easily jammed by any other signal in the same band.
How does CSS modulation work?
Chirp Spread Spectrum (CSS) modulation starts with digital data that enters a modulator containing an encoder and an interleaver. The Encoder receives the digital data and uses a Gray code to convert each bit into a codeword.
