Design and Implementation of Digital Signal Processing Platform for Ultra-short Baseline Positioning System Based on PSOC

With the gradual increase in human exploitation of the ocean, more and more underwater operations require underwater positioning to assist developers in managing underwater equipment and developing resources. Ultra-short Baseline positioning system, with its small size and ease of installation, boasts a wide range of application scenarios. However, the majority of the existing digital processing platforms for USBL positioning systems use a structure that combines discrete MCU with discrete FPGA. This structure increases the number of components, enlarges the occupied area, and introduces potential failure points. Therefore, this article proposes the design and implementation of a digital signal processing platform based on the PSOC chip. The PSOC chip integrates the CPU and FPGA into a single chip, reducing the number of components and the communication costs between different devices, as well as shortening the development cycle. This article analyzes the design of the main control module and the storage circuit module of the platform, and focuses on the design of the power supply module. It also introduces the chip selection for other modules and implements these designs on a PCB. The final tests demonstrate that the digital signal processing platform designed and implemented in this article meets the design requirements and can operate normally.