Walasey Ltd





Chirp Spread Spectrum (CSS)

Chirp Spread Spectrum (CSS) is a customized application of MDMA for the requirements of batteryˇVpowered applications, where the reliability of the transmission as well as low power consumption are of special importance. CSS forms the basis of the nanoLOC TRX Transceiver which was developed for medium data rate applications. CSS consists of Chirp pulses, an Upchirp and a Downchip, as illustrated below.

Upchirp and Downchirp
Chirp Spread Spectrum

Key Features of CSS

  • Robust against disturbances
  • Robust against multipath fading
  • Low power consumption
  • Easy to implement in silicon