Chirp spread spectrum

Additionally, chirp spread spectrum is resistant to the Doppler effect, which is typical in mobile radio applications.

[2] Chirp spread spectrum was originally designed to compete with ultra-wideband for precision ranging and low-rate wireless networks in the 2.45 GHz band.

[4] Finally, the IEEE 802.15.4a PHY standard actually mixes CSS encoding techniques with differential phase shift keying modulation (DPSK) to achieve better data rates.

Chirp spread spectrum may also be used in the future for military applications as it is very difficult to detect and intercept when operating at low power.

[5] Very similar frequency swept waveforms are used in frequency modulated continuous wave radars to measure range (distance); an unmodulated continuous wave Doppler radar can only measure range-rate (relative velocity along the line of sight).