Batlan is the name of the technology that powers our radios. It is ideally suited to low-power outdoor applications. Batlan provides higher data rates, lower power consumption, and better reliability than traditional technologies.
Batlan is a patented spread spectrum digital modulation technique which uses chirp signals to convey digital information over the wireless channel. Chirp signals have long been known to possess many unique properties which avail themselves well in wireless systems. Many of these properties turn out to be particularly well suited to low power applications.
Figure 1 - Typical Linear Chirp signal sweeping from f1 to f2
Chirp signals are commonly referred to as Continuous Frequency Modulated (CFM) signals and it is their continuous (rather than discrete) nature which makes them unique when used in spread-spectrum systems. Rather than carry information in their phase or instantaneous frequency, it is the evolution of their frequency over time which distinguishes one chirp signal from another. This means that phase coherency is not required between receiver and transmitter and chirp systems are very tolerant of frequency offsets. For duty cycled systems which spent most of their time in "sleep mode", this significantly reduces the time it takes to transition from a sleep mode to active transmission mode, which reduces the average power consumption.
Their tolerance to large transmitter-receiver frequency offsets also means Doppler effects (i.e. where one or both sides of the link are moving relative to the other) do not significantly impact system performance.