used when longer ranges and devices moving at high speeds are part of work. Nanotron's CSS implementation was actually seen to work at a range of 570 meters between devices. Further, Nanotron's implementation can work at data rates of up to 2 Mbit/s - higher than specified in 802.15.4a. 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.РChirp 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.Р4、Time-hoppingРTime-Hopping munications, a type of spread spectrum technology in which the carrier is turned on and off by the pseudorandom code sequence. In here we will not go into detail.
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