Low Complexity DSSS Acquisition Method of LEO Satellite Communication ASIC

Abstract

Low-Earth orbit (LEO) satellite communication application specific integrated circuit (ASIC) is being applied in satellite communication payloads due to their advantages of small size, low power consumption, and resistance to single event upset (SEU). In this study, a direct sequence spread spectrum (DSSS) receiver model is introduced for LEO satellite communication ASIC. To meet the requirement of low logical resources consumption, a low complexity DSSS acquisition method is proposed to achieve fast acquisition under the circumstance of high dynamic and low signal-to-noise ratio (SNR). Compared with the conventional acquisition methods, the new method can significantly reduce the consumption of random access memory (RAM) resources and lookup table (LUT) resources 51% and 75%, respectively, and consumes none hard IP cores such as digital signal processing 48E1 (DSP48E1) resources. Currently, this method has been successfully applied to several LEO satellite communication ASICs.