In An Electronic Surveillance System, Digital Signal Processing Module Hardware Design

Electronic reconnaissance systems search, identify, locate and analysis the radio signals of the enemy's electronic devices, then determine the technical parameters of these devices, and then get the enemy's intelligence. Digital signal processing technology is the soul of electronic reconnaissance systems, directly determine the detection rate, sensitivity, range and other technical indicators. With the development of DSP technology and software radio technology, electronic reconnaissance systems are moving towards all-digital direction.Signal processing module is the computer center of electronic reconnaissance systems. And it is composed by hardware and software. Software includes algorithms and program. Hardware including the processing chip, peripheral chips, connectors, and PCB and so on. Hardware includes the processing chip, peripheral chips, connectors, and PCB and so on. To a large extent, hardware design determines the capabilities, performance, reliability, manufacturability, maintainability, electromagnetic compatibility of the device. Hardware design needs to comply with strict standards and processes. This is a significant difference between the engineering design and academic research,This paper introduces the chip selection, hardware design and PCB design process of the signal processing module in an electronic reconnaissance system. On the one hand it describes the principles of signal processing module, on the other hand highlights the hardware design and PCB design process, the important specification and precautions. On this basis, the paper also briefly describes the underlying software design and logic design principles and processes.The framework of the signal processing module is "DSP+FPGA", respectively using TS201S, Virtex4. DSP chips are the core of digital signal processing. The primary algorithms are implemented by program running on the DSP. FPGA is the interface of control and data signal, and also is the auxiliary signal processing center. An embedded computer controls the signal processing unit through the local bus.We use the ORCAD Capture software of Cadence company to design schematics and the allegro software of Cadence company to design PCB. We referenced the hardware design guide and reference designs and considered the signal quality, high-speed wiring and other considerations. We use the integrated design tools named tornado of windriver Corporation to design driver software and FPGA design tools to design and simulate logic circuit.Through the work of this paper, we completed the chip selection, schematics design, PCB design, part of the FPGA design, but also completed a driver software design (the master control computer unit). So we build a stable and reliable hardware platform for digital signal processing software.