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Performance improvements due to chirp gating in communication systems

In this paper we present a new method of signal processing in chirp spread spectrum systems utilizing tapped dispersive Surface Acoustic Wave (SAW) delay lines. The fundamentals of chirp impulse compression and its application to a reliable low cost data transmission system are described. The vulnerability to jammers is discussed and the necessity of interference suppression is shown. Our new suppression method in time and frequency, yields fast adaptive interference cancellation. Due to the implementation of SAW matched chirp filters for impulse compression, there is no necessity of synchronization for detection in the receiver. For verification of the theory, simulation results and some experimental results are presented.