Synchronization Steps for Low Complexity Chirp Spread Spectrum (CSS) Receivers

The chirp spread spectrum (CSS) has gained much attention over the recent years due to its wide adoption in low power wide area network technologies (LPWANs). It is one of the promising physical layer (PHY) options for fulfilling long range and low data rate communication that occur in many of today's Internet of Things (IoT) devices, i.e., LORA and etc. This paper discusses the low complexity and low power implementation of a CSS modem from synchronization perspectives. We address the CSS receiver architecture with consideration to its unique synchronization steps under low Signal to Noise Ratio (SNR) environment.